diff --git a/javatests/com/google/gerrit/acceptance/BUILD b/javatests/com/google/gerrit/acceptance/BUILD
index 32804ef..54b3626 100644
--- a/javatests/com/google/gerrit/acceptance/BUILD
+++ b/javatests/com/google/gerrit/acceptance/BUILD
@@ -6,6 +6,7 @@
     deps = [
         "//java/com/google/gerrit/acceptance:lib",
         "//java/com/google/gerrit/server/util/time",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib:guava",
         "//lib/jgit/org.eclipse.jgit:jgit",
         "//lib/truth",
diff --git a/javatests/com/google/gerrit/acceptance/MergeableFileBasedConfigTest.java b/javatests/com/google/gerrit/acceptance/MergeableFileBasedConfigTest.java
index 49c23e3..69fdc7e 100644
--- a/javatests/com/google/gerrit/acceptance/MergeableFileBasedConfigTest.java
+++ b/javatests/com/google/gerrit/acceptance/MergeableFileBasedConfigTest.java
@@ -18,13 +18,14 @@
 import static java.nio.charset.StandardCharsets.UTF_8;
 
 import com.google.common.collect.ImmutableList;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.io.File;
 import java.nio.file.Files;
 import org.eclipse.jgit.lib.Config;
 import org.eclipse.jgit.util.FS;
 import org.junit.Test;
 
-public class MergeableFileBasedConfigTest {
+public class MergeableFileBasedConfigTest extends GerritBaseTests {
   @Test
   public void mergeNull() throws Exception {
     MergeableFileBasedConfig cfg = newConfig();
diff --git a/javatests/com/google/gerrit/common/AutoValueTest.java b/javatests/com/google/gerrit/common/AutoValueTest.java
index 947fe4a..89d7bf4 100644
--- a/javatests/com/google/gerrit/common/AutoValueTest.java
+++ b/javatests/com/google/gerrit/common/AutoValueTest.java
@@ -17,9 +17,10 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.auto.value.AutoValue;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class AutoValueTest {
+public class AutoValueTest extends GerritBaseTests {
   @AutoValue
   abstract static class Auto {
     static Auto create(String val) {
diff --git a/javatests/com/google/gerrit/common/BUILD b/javatests/com/google/gerrit/common/BUILD
index 9c5700e..88ddcd5 100644
--- a/javatests/com/google/gerrit/common/BUILD
+++ b/javatests/com/google/gerrit/common/BUILD
@@ -12,6 +12,7 @@
         "//java/com/google/gerrit/common:version",
         "//java/com/google/gerrit/launcher",
         "//java/com/google/gerrit/reviewdb:server",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib:guava",
         "//lib/auto:auto-value",
         "//lib/auto:auto-value-annotations",
diff --git a/javatests/com/google/gerrit/common/data/AccessSectionTest.java b/javatests/com/google/gerrit/common/data/AccessSectionTest.java
index a59c015..b162f8f 100644
--- a/javatests/com/google/gerrit/common/data/AccessSectionTest.java
+++ b/javatests/com/google/gerrit/common/data/AccessSectionTest.java
@@ -17,6 +17,7 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.common.collect.ImmutableList;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
@@ -25,7 +26,7 @@
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class AccessSectionTest {
+public class AccessSectionTest extends GerritBaseTests {
   @Rule public ExpectedException exception = ExpectedException.none();
 
   private static final String REF_PATTERN = "refs/heads/master";
diff --git a/javatests/com/google/gerrit/common/data/EncodePathSeparatorTest.java b/javatests/com/google/gerrit/common/data/EncodePathSeparatorTest.java
index dcd3c05..3dd2db3 100644
--- a/javatests/com/google/gerrit/common/data/EncodePathSeparatorTest.java
+++ b/javatests/com/google/gerrit/common/data/EncodePathSeparatorTest.java
@@ -16,9 +16,10 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class EncodePathSeparatorTest {
+public class EncodePathSeparatorTest extends GerritBaseTests {
   @Test
   public void defaultBehaviour() {
     assertThat(new GitwebType().replacePathSeparator("a/b")).isEqualTo("a/b");
diff --git a/javatests/com/google/gerrit/common/data/FilenameComparatorTest.java b/javatests/com/google/gerrit/common/data/FilenameComparatorTest.java
index ec71e05..055f57d 100644
--- a/javatests/com/google/gerrit/common/data/FilenameComparatorTest.java
+++ b/javatests/com/google/gerrit/common/data/FilenameComparatorTest.java
@@ -16,9 +16,10 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class FilenameComparatorTest {
+public class FilenameComparatorTest extends GerritBaseTests {
   private FilenameComparator comparator = FilenameComparator.INSTANCE;
 
   @Test
diff --git a/javatests/com/google/gerrit/common/data/GroupReferenceTest.java b/javatests/com/google/gerrit/common/data/GroupReferenceTest.java
index fdc9dc6..921b421 100644
--- a/javatests/com/google/gerrit/common/data/GroupReferenceTest.java
+++ b/javatests/com/google/gerrit/common/data/GroupReferenceTest.java
@@ -18,11 +18,12 @@
 
 import com.google.gerrit.reviewdb.client.AccountGroup;
 import com.google.gerrit.reviewdb.client.AccountGroup.UUID;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class GroupReferenceTest {
+public class GroupReferenceTest extends GerritBaseTests {
   @Rule public ExpectedException exception = ExpectedException.none();
 
   @Test
diff --git a/javatests/com/google/gerrit/common/data/LabelFunctionTest.java b/javatests/com/google/gerrit/common/data/LabelFunctionTest.java
index 985f514..ef71b67 100644
--- a/javatests/com/google/gerrit/common/data/LabelFunctionTest.java
+++ b/javatests/com/google/gerrit/common/data/LabelFunctionTest.java
@@ -23,13 +23,14 @@
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.PatchSet.Id;
 import com.google.gerrit.reviewdb.client.PatchSetApproval;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.sql.Date;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.List;
 import org.junit.Test;
 
-public class LabelFunctionTest {
+public class LabelFunctionTest extends GerritBaseTests {
   private static final String LABEL_NAME = "Verified";
   private static final LabelId LABEL_ID = new LabelId(LABEL_NAME);
   private static final Change.Id CHANGE_ID = new Change.Id(100);
diff --git a/javatests/com/google/gerrit/common/data/LabelTypeTest.java b/javatests/com/google/gerrit/common/data/LabelTypeTest.java
index 6c3befb..db0df2e 100644
--- a/javatests/com/google/gerrit/common/data/LabelTypeTest.java
+++ b/javatests/com/google/gerrit/common/data/LabelTypeTest.java
@@ -17,9 +17,10 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.common.collect.ImmutableList;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class LabelTypeTest {
+public class LabelTypeTest extends GerritBaseTests {
   @Test
   public void sortLabelValues() {
     LabelValue v0 = new LabelValue((short) 0, "Zero");
diff --git a/javatests/com/google/gerrit/common/data/ParameterizedStringTest.java b/javatests/com/google/gerrit/common/data/ParameterizedStringTest.java
index b646d2b..b22a511 100644
--- a/javatests/com/google/gerrit/common/data/ParameterizedStringTest.java
+++ b/javatests/com/google/gerrit/common/data/ParameterizedStringTest.java
@@ -17,11 +17,12 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.common.collect.ImmutableMap;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.HashMap;
 import java.util.Map;
 import org.junit.Test;
 
-public class ParameterizedStringTest {
+public class ParameterizedStringTest extends GerritBaseTests {
   @Test
   public void emptyString() {
     ParameterizedString p = new ParameterizedString("");
diff --git a/javatests/com/google/gerrit/common/data/PermissionRuleTest.java b/javatests/com/google/gerrit/common/data/PermissionRuleTest.java
index 14c47b4..7a7d5f3 100644
--- a/javatests/com/google/gerrit/common/data/PermissionRuleTest.java
+++ b/javatests/com/google/gerrit/common/data/PermissionRuleTest.java
@@ -18,12 +18,13 @@
 
 import com.google.gerrit.common.data.PermissionRule.Action;
 import com.google.gerrit.reviewdb.client.AccountGroup;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class PermissionRuleTest {
+public class PermissionRuleTest extends GerritBaseTests {
   @Rule public ExpectedException exception = ExpectedException.none();
 
   private GroupReference groupReference;
diff --git a/javatests/com/google/gerrit/common/data/PermissionTest.java b/javatests/com/google/gerrit/common/data/PermissionTest.java
index f76323f..84fb2f0 100644
--- a/javatests/com/google/gerrit/common/data/PermissionTest.java
+++ b/javatests/com/google/gerrit/common/data/PermissionTest.java
@@ -18,12 +18,13 @@
 
 import com.google.common.collect.ImmutableList;
 import com.google.gerrit.reviewdb.client.AccountGroup;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.ArrayList;
 import java.util.List;
 import org.junit.Before;
 import org.junit.Test;
 
-public class PermissionTest {
+public class PermissionTest extends GerritBaseTests {
   private static final String PERMISSION_NAME = "foo";
 
   private Permission permission;
diff --git a/javatests/com/google/gerrit/common/data/SubmitRecordTest.java b/javatests/com/google/gerrit/common/data/SubmitRecordTest.java
index 5386b87..5b9fde7 100644
--- a/javatests/com/google/gerrit/common/data/SubmitRecordTest.java
+++ b/javatests/com/google/gerrit/common/data/SubmitRecordTest.java
@@ -16,11 +16,12 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.ArrayList;
 import java.util.Collection;
 import org.junit.Test;
 
-public class SubmitRecordTest {
+public class SubmitRecordTest extends GerritBaseTests {
   private static final SubmitRecord OK_RECORD;
   private static final SubmitRecord FORCED_RECORD;
   private static final SubmitRecord NOT_READY_RECORD;
diff --git a/javatests/com/google/gerrit/elasticsearch/BUILD b/javatests/com/google/gerrit/elasticsearch/BUILD
index cc849eb..51d45f2 100644
--- a/javatests/com/google/gerrit/elasticsearch/BUILD
+++ b/javatests/com/google/gerrit/elasticsearch/BUILD
@@ -86,6 +86,7 @@
     tags = ["elastic"],
     deps = [
         "//java/com/google/gerrit/elasticsearch",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib:guava",
         "//lib/guice",
         "//lib/jgit/org.eclipse.jgit:jgit",
diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticConfigurationTest.java b/javatests/com/google/gerrit/elasticsearch/ElasticConfigurationTest.java
index 559b8c7..86b564b 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticConfigurationTest.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticConfigurationTest.java
@@ -27,6 +27,7 @@
 import static java.util.stream.Collectors.toList;
 
 import com.google.common.collect.ImmutableList;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.inject.ProvisionException;
 import java.util.Arrays;
 import java.util.concurrent.TimeUnit;
@@ -35,7 +36,7 @@
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class ElasticConfigurationTest {
+public class ElasticConfigurationTest extends GerritBaseTests {
   @Rule public ExpectedException exception = ExpectedException.none();
 
   @Test
diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticVersionTest.java b/javatests/com/google/gerrit/elasticsearch/ElasticVersionTest.java
index b598a0a..56584b1 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticVersionTest.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticVersionTest.java
@@ -16,11 +16,12 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class ElasticVersionTest {
+public class ElasticVersionTest extends GerritBaseTests {
   @Rule public ExpectedException exception = ExpectedException.none();
 
   @Test
diff --git a/javatests/com/google/gerrit/extensions/BUILD b/javatests/com/google/gerrit/extensions/BUILD
index 069c915..adf696d 100644
--- a/javatests/com/google/gerrit/extensions/BUILD
+++ b/javatests/com/google/gerrit/extensions/BUILD
@@ -7,6 +7,7 @@
     deps = [
         "//java/com/google/gerrit/extensions:api",
         "//java/com/google/gerrit/extensions/common/testing:common-test-util",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib/guice",
         "//lib/truth",
     ],
diff --git a/javatests/com/google/gerrit/extensions/api/lfs/LfsDefinitionsTest.java b/javatests/com/google/gerrit/extensions/api/lfs/LfsDefinitionsTest.java
index 0be10ee..86dce04 100644
--- a/javatests/com/google/gerrit/extensions/api/lfs/LfsDefinitionsTest.java
+++ b/javatests/com/google/gerrit/extensions/api/lfs/LfsDefinitionsTest.java
@@ -16,11 +16,12 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import org.junit.Test;
 
-public class LfsDefinitionsTest {
+public class LfsDefinitionsTest extends GerritBaseTests {
   private static final String[] URL_PREFIXES = new String[] {"/", "/a/", "/p/", "/a/p/"};
 
   @Test
diff --git a/javatests/com/google/gerrit/extensions/client/RangeTest.java b/javatests/com/google/gerrit/extensions/client/RangeTest.java
index b8938aa..2c713b5 100644
--- a/javatests/com/google/gerrit/extensions/client/RangeTest.java
+++ b/javatests/com/google/gerrit/extensions/client/RangeTest.java
@@ -16,9 +16,10 @@
 
 import static com.google.gerrit.extensions.common.testing.RangeSubject.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class RangeTest {
+public class RangeTest extends GerritBaseTests {
 
   @Test
   public void rangeOverMultipleLinesWithSmallerEndCharacterIsValid() {
diff --git a/javatests/com/google/gerrit/extensions/conditions/BUILD b/javatests/com/google/gerrit/extensions/conditions/BUILD
index e2d5951..7ad2ad3 100644
--- a/javatests/com/google/gerrit/extensions/conditions/BUILD
+++ b/javatests/com/google/gerrit/extensions/conditions/BUILD
@@ -5,6 +5,7 @@
     srcs = glob(["*.java"]),
     deps = [
         "//java/com/google/gerrit/extensions:lib",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib/truth",
     ],
 )
diff --git a/javatests/com/google/gerrit/extensions/conditions/BooleanConditionTest.java b/javatests/com/google/gerrit/extensions/conditions/BooleanConditionTest.java
index f9f1fa85..81cb719 100644
--- a/javatests/com/google/gerrit/extensions/conditions/BooleanConditionTest.java
+++ b/javatests/com/google/gerrit/extensions/conditions/BooleanConditionTest.java
@@ -20,9 +20,10 @@
 import static com.google.gerrit.extensions.conditions.BooleanCondition.valueOf;
 import static org.junit.Assert.assertEquals;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class BooleanConditionTest {
+public class BooleanConditionTest extends GerritBaseTests {
 
   private static final BooleanCondition NO_TRIVIAL_EVALUATION =
       new BooleanCondition() {
diff --git a/javatests/com/google/gerrit/extensions/registration/DynamicSetTest.java b/javatests/com/google/gerrit/extensions/registration/DynamicSetTest.java
index 0542c35..d950224 100644
--- a/javatests/com/google/gerrit/extensions/registration/DynamicSetTest.java
+++ b/javatests/com/google/gerrit/extensions/registration/DynamicSetTest.java
@@ -17,13 +17,14 @@
 import static com.google.common.truth.Truth.assertThat;
 import static java.util.stream.Collectors.toSet;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.inject.Key;
 import com.google.inject.Provider;
 import com.google.inject.util.Providers;
 import java.util.Iterator;
 import org.junit.Test;
 
-public class DynamicSetTest {
+public class DynamicSetTest extends GerritBaseTests {
   // In tests for {@link DynamicSet#contains(Object)}, be sure to avoid
   // {@code assertThat(ds).contains(...) @} and
   // {@code assertThat(ds).DoesNotContains(...) @} as (since
diff --git a/javatests/com/google/gerrit/git/BUILD b/javatests/com/google/gerrit/git/BUILD
index 458bdf9..d57d73f 100644
--- a/javatests/com/google/gerrit/git/BUILD
+++ b/javatests/com/google/gerrit/git/BUILD
@@ -10,6 +10,7 @@
     tags = ["no_windows"],
     deps = [
         "//java/com/google/gerrit/git",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib:guava",
         "//lib:junit",
         "//lib/jgit/org.eclipse.jgit:jgit",
@@ -27,6 +28,7 @@
     ),
     deps = [
         "//java/com/google/gerrit/git",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib:guava",
         "//lib/jgit/org.eclipse.jgit:jgit",
         "//lib/truth",
diff --git a/javatests/com/google/gerrit/git/RefUpdateUtilRepoTest.java b/javatests/com/google/gerrit/git/RefUpdateUtilRepoTest.java
index 99247b8..cdc94c2 100644
--- a/javatests/com/google/gerrit/git/RefUpdateUtilRepoTest.java
+++ b/javatests/com/google/gerrit/git/RefUpdateUtilRepoTest.java
@@ -19,6 +19,7 @@
 import com.google.common.collect.ImmutableList;
 import com.google.common.io.MoreFiles;
 import com.google.common.io.RecursiveDeleteOption;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import org.eclipse.jgit.internal.storage.dfs.DfsRepositoryDescription;
@@ -35,7 +36,7 @@
 import org.junit.runners.Parameterized.Parameters;
 
 @RunWith(Parameterized.class)
-public class RefUpdateUtilRepoTest {
+public class RefUpdateUtilRepoTest extends GerritBaseTests {
   public enum RepoSetup {
     LOCAL_DISK {
       @Override
diff --git a/javatests/com/google/gerrit/git/RefUpdateUtilTest.java b/javatests/com/google/gerrit/git/RefUpdateUtilTest.java
index fe40fb4..429583a 100644
--- a/javatests/com/google/gerrit/git/RefUpdateUtilTest.java
+++ b/javatests/com/google/gerrit/git/RefUpdateUtilTest.java
@@ -19,6 +19,7 @@
 import static com.google.common.truth.Truth.assert_;
 
 import com.google.common.collect.ImmutableList;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.io.IOException;
 import java.util.function.Consumer;
 import org.eclipse.jgit.internal.storage.dfs.DfsRepositoryDescription;
@@ -32,7 +33,7 @@
 import org.junit.runners.JUnit4;
 
 @RunWith(JUnit4.class)
-public class RefUpdateUtilTest {
+public class RefUpdateUtilTest extends GerritBaseTests {
   private static final Consumer<ReceiveCommand> OK = c -> c.setResult(ReceiveCommand.Result.OK);
   private static final Consumer<ReceiveCommand> LOCK_FAILURE =
       c -> c.setResult(ReceiveCommand.Result.LOCK_FAILURE);
diff --git a/javatests/com/google/gerrit/git/testing/BUILD b/javatests/com/google/gerrit/git/testing/BUILD
index 56e9ec2..1309185 100644
--- a/javatests/com/google/gerrit/git/testing/BUILD
+++ b/javatests/com/google/gerrit/git/testing/BUILD
@@ -5,6 +5,7 @@
     srcs = glob(["*.java"]),
     deps = [
         "//java/com/google/gerrit/git/testing",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib/truth",
     ],
 )
diff --git a/javatests/com/google/gerrit/git/testing/PushResultSubjectTest.java b/javatests/com/google/gerrit/git/testing/PushResultSubjectTest.java
index 3bf815b..5ab52d4 100644
--- a/javatests/com/google/gerrit/git/testing/PushResultSubjectTest.java
+++ b/javatests/com/google/gerrit/git/testing/PushResultSubjectTest.java
@@ -18,9 +18,10 @@
 import static com.google.gerrit.git.testing.PushResultSubject.parseProcessed;
 import static com.google.gerrit.git.testing.PushResultSubject.trimMessages;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class PushResultSubjectTest {
+public class PushResultSubjectTest extends GerritBaseTests {
   @Test
   public void testTrimMessages() {
     assertThat(trimMessages(null)).isNull();
diff --git a/javatests/com/google/gerrit/gpg/GerritPublicKeyCheckerTest.java b/javatests/com/google/gerrit/gpg/GerritPublicKeyCheckerTest.java
index 689d786..b90ccf7c 100644
--- a/javatests/com/google/gerrit/gpg/GerritPublicKeyCheckerTest.java
+++ b/javatests/com/google/gerrit/gpg/GerritPublicKeyCheckerTest.java
@@ -44,6 +44,7 @@
 import com.google.gerrit.server.schema.ReviewDbSchemaCreator;
 import com.google.gerrit.server.util.RequestContext;
 import com.google.gerrit.server.util.ThreadLocalRequestContext;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.InMemoryDatabase;
 import com.google.gerrit.testing.InMemoryModule;
 import com.google.gerrit.testing.NoteDbMode;
@@ -69,7 +70,7 @@
 import org.junit.Test;
 
 /** Unit tests for {@link GerritPublicKeyChecker}. */
-public class GerritPublicKeyCheckerTest {
+public class GerritPublicKeyCheckerTest extends GerritBaseTests {
   @Inject @ServerInitiated private Provider<AccountsUpdate> accountsUpdateProvider;
 
   @Inject private AccountManager accountManager;
diff --git a/javatests/com/google/gerrit/gpg/PublicKeyCheckerTest.java b/javatests/com/google/gerrit/gpg/PublicKeyCheckerTest.java
index 48d5266..6d94bd0 100644
--- a/javatests/com/google/gerrit/gpg/PublicKeyCheckerTest.java
+++ b/javatests/com/google/gerrit/gpg/PublicKeyCheckerTest.java
@@ -38,6 +38,7 @@
 import static org.junit.Assert.assertEquals;
 
 import com.google.gerrit.gpg.testing.TestKey;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -61,7 +62,7 @@
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class PublicKeyCheckerTest {
+public class PublicKeyCheckerTest extends GerritBaseTests {
   @Rule public ExpectedException thrown = ExpectedException.none();
 
   private InMemoryRepository repo;
diff --git a/javatests/com/google/gerrit/gpg/PublicKeyStoreTest.java b/javatests/com/google/gerrit/gpg/PublicKeyStoreTest.java
index 2fc06a6..95c0e85 100644
--- a/javatests/com/google/gerrit/gpg/PublicKeyStoreTest.java
+++ b/javatests/com/google/gerrit/gpg/PublicKeyStoreTest.java
@@ -28,6 +28,7 @@
 
 import com.google.common.collect.Iterators;
 import com.google.gerrit.gpg.testing.TestKey;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
@@ -49,7 +50,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class PublicKeyStoreTest {
+public class PublicKeyStoreTest extends GerritBaseTests {
   private TestRepository<?> tr;
   private PublicKeyStore store;
 
diff --git a/javatests/com/google/gerrit/gpg/PushCertificateCheckerTest.java b/javatests/com/google/gerrit/gpg/PushCertificateCheckerTest.java
index 266f868..67bf050 100644
--- a/javatests/com/google/gerrit/gpg/PushCertificateCheckerTest.java
+++ b/javatests/com/google/gerrit/gpg/PushCertificateCheckerTest.java
@@ -23,6 +23,7 @@
 import static org.junit.Assert.assertEquals;
 
 import com.google.gerrit.gpg.testing.TestKey;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.InputStreamReader;
@@ -53,7 +54,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class PushCertificateCheckerTest {
+public class PushCertificateCheckerTest extends GerritBaseTests {
   private InMemoryRepository repo;
   private PublicKeyStore store;
   private SignedPushConfig signedPushConfig;
diff --git a/javatests/com/google/gerrit/httpd/AllRequestFilterFilterProxyTest.java b/javatests/com/google/gerrit/httpd/AllRequestFilterFilterProxyTest.java
index 1c6559b0..e2c58d8 100644
--- a/javatests/com/google/gerrit/httpd/AllRequestFilterFilterProxyTest.java
+++ b/javatests/com/google/gerrit/httpd/AllRequestFilterFilterProxyTest.java
@@ -21,6 +21,7 @@
 import com.google.gerrit.extensions.registration.DynamicSet;
 import com.google.gerrit.extensions.registration.ReloadableRegistrationHandle;
 import com.google.gerrit.server.plugins.Plugin;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.util.http.testutil.FakeHttpServletRequest;
 import com.google.gerrit.util.http.testutil.FakeHttpServletResponse;
 import com.google.inject.Key;
@@ -35,7 +36,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class AllRequestFilterFilterProxyTest {
+public class AllRequestFilterFilterProxyTest extends GerritBaseTests {
   /**
    * Set of filters for FilterProxy
    *
diff --git a/javatests/com/google/gerrit/httpd/BUILD b/javatests/com/google/gerrit/httpd/BUILD
index ec2df15..fe76d54 100644
--- a/javatests/com/google/gerrit/httpd/BUILD
+++ b/javatests/com/google/gerrit/httpd/BUILD
@@ -10,6 +10,7 @@
         "//java/com/google/gerrit/httpd",
         "//java/com/google/gerrit/reviewdb:server",
         "//java/com/google/gerrit/server",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//java/com/google/gerrit/util/http",
         "//javatests/com/google/gerrit/util/http/testutil",
         "//lib:gson",
diff --git a/javatests/com/google/gerrit/httpd/RemoteUserUtilTest.java b/javatests/com/google/gerrit/httpd/RemoteUserUtilTest.java
index f012ee3..e19085d 100644
--- a/javatests/com/google/gerrit/httpd/RemoteUserUtilTest.java
+++ b/javatests/com/google/gerrit/httpd/RemoteUserUtilTest.java
@@ -17,9 +17,10 @@
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.gerrit.httpd.RemoteUserUtil.extractUsername;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class RemoteUserUtilTest {
+public class RemoteUserUtilTest extends GerritBaseTests {
   @Test
   public void testExtractUsername() {
     assertThat(extractUsername(null)).isNull();
diff --git a/javatests/com/google/gerrit/httpd/plugins/ContextMapperTest.java b/javatests/com/google/gerrit/httpd/plugins/ContextMapperTest.java
index 684a241..2de3788 100644
--- a/javatests/com/google/gerrit/httpd/plugins/ContextMapperTest.java
+++ b/javatests/com/google/gerrit/httpd/plugins/ContextMapperTest.java
@@ -16,11 +16,12 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.util.http.testutil.FakeHttpServletRequest;
 import javax.servlet.http.HttpServletRequest;
 import org.junit.Test;
 
-public class ContextMapperTest {
+public class ContextMapperTest extends GerritBaseTests {
 
   private static final String CONTEXT = "/context";
   private static final String PLUGIN_NAME = "my-plugin";
diff --git a/javatests/com/google/gerrit/httpd/raw/IndexServletTest.java b/javatests/com/google/gerrit/httpd/raw/IndexServletTest.java
index 307a23e..b4f8e7a 100644
--- a/javatests/com/google/gerrit/httpd/raw/IndexServletTest.java
+++ b/javatests/com/google/gerrit/httpd/raw/IndexServletTest.java
@@ -17,11 +17,12 @@
 import static com.google.common.truth.Truth.assertThat;
 import static java.nio.charset.StandardCharsets.UTF_8;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.template.soy.data.SoyMapData;
 import java.net.URISyntaxException;
 import org.junit.Test;
 
-public class IndexServletTest {
+public class IndexServletTest extends GerritBaseTests {
   static class TestIndexServlet extends IndexServlet {
     private static final long serialVersionUID = 1L;
 
diff --git a/javatests/com/google/gerrit/httpd/raw/ResourceServletTest.java b/javatests/com/google/gerrit/httpd/raw/ResourceServletTest.java
index 6dd15bc..cfcc1d0 100644
--- a/javatests/com/google/gerrit/httpd/raw/ResourceServletTest.java
+++ b/javatests/com/google/gerrit/httpd/raw/ResourceServletTest.java
@@ -28,6 +28,7 @@
 import com.google.common.jimfs.Configuration;
 import com.google.common.jimfs.Jimfs;
 import com.google.gerrit.httpd.raw.ResourceServlet.Resource;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.util.http.testutil.FakeHttpServletRequest;
 import com.google.gerrit.util.http.testutil.FakeHttpServletResponse;
 import java.io.ByteArrayInputStream;
@@ -44,7 +45,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class ResourceServletTest {
+public class ResourceServletTest extends GerritBaseTests {
   private static Cache<Path, Resource> newCache(int size) {
     return CacheBuilder.newBuilder().maximumSize(size).recordStats().build();
   }
diff --git a/javatests/com/google/gerrit/httpd/restapi/HttpLogRedactTest.java b/javatests/com/google/gerrit/httpd/restapi/HttpLogRedactTest.java
index fb1ebd9..fa3eaea 100644
--- a/javatests/com/google/gerrit/httpd/restapi/HttpLogRedactTest.java
+++ b/javatests/com/google/gerrit/httpd/restapi/HttpLogRedactTest.java
@@ -16,9 +16,10 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class HttpLogRedactTest {
+public class HttpLogRedactTest extends GerritBaseTests {
   @Test
   public void redactAuth() {
     assertThat(LogRedactUtil.redactQueryString("query=status:open")).isEqualTo("query=status:open");
diff --git a/javatests/com/google/gerrit/httpd/restapi/ParameterParserTest.java b/javatests/com/google/gerrit/httpd/restapi/ParameterParserTest.java
index 13732b0..30d318b 100644
--- a/javatests/com/google/gerrit/httpd/restapi/ParameterParserTest.java
+++ b/javatests/com/google/gerrit/httpd/restapi/ParameterParserTest.java
@@ -22,13 +22,14 @@
 import com.google.common.collect.ImmutableSet;
 import com.google.gerrit.extensions.restapi.BadRequestException;
 import com.google.gerrit.httpd.restapi.ParameterParser.QueryParams;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.util.http.testutil.FakeHttpServletRequest;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonPrimitive;
 import org.junit.Test;
 
-public class ParameterParserTest {
+public class ParameterParserTest extends GerritBaseTests {
   @Test
   public void convertFormToJson() throws BadRequestException {
     JsonObject obj =
diff --git a/javatests/com/google/gerrit/index/BUILD b/javatests/com/google/gerrit/index/BUILD
index 5597ed1..e3436bc 100644
--- a/javatests/com/google/gerrit/index/BUILD
+++ b/javatests/com/google/gerrit/index/BUILD
@@ -9,6 +9,7 @@
         "//antlr3:query_parser",
         "//java/com/google/gerrit/index",
         "//java/com/google/gerrit/index:query_exception",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib:guava",
         "//lib:junit",
         "//lib/antlr:java-runtime",
diff --git a/javatests/com/google/gerrit/index/SchemaUtilTest.java b/javatests/com/google/gerrit/index/SchemaUtilTest.java
index 3c0bbe0..1cfed3d 100644
--- a/javatests/com/google/gerrit/index/SchemaUtilTest.java
+++ b/javatests/com/google/gerrit/index/SchemaUtilTest.java
@@ -19,13 +19,14 @@
 import static com.google.gerrit.index.SchemaUtil.getPersonParts;
 import static com.google.gerrit.index.SchemaUtil.schema;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.Map;
 import org.eclipse.jgit.lib.PersonIdent;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class SchemaUtilTest {
+public class SchemaUtilTest extends GerritBaseTests {
   @Rule public ExpectedException exception = ExpectedException.none();
 
   static class TestSchemas {
diff --git a/javatests/com/google/gerrit/index/query/QueryParserTest.java b/javatests/com/google/gerrit/index/query/QueryParserTest.java
index 448f292..2175f7d 100644
--- a/javatests/com/google/gerrit/index/query/QueryParserTest.java
+++ b/javatests/com/google/gerrit/index/query/QueryParserTest.java
@@ -16,10 +16,11 @@
 
 import static org.junit.Assert.assertEquals;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.antlr.runtime.tree.Tree;
 import org.junit.Test;
 
-public class QueryParserTest {
+public class QueryParserTest extends GerritBaseTests {
   @Test
   public void projectBare() throws QueryParseException {
     Tree r;
diff --git a/javatests/com/google/gerrit/mail/AbstractParserTest.java b/javatests/com/google/gerrit/mail/AbstractParserTest.java
index 6ab4ca2..c375aff 100644
--- a/javatests/com/google/gerrit/mail/AbstractParserTest.java
+++ b/javatests/com/google/gerrit/mail/AbstractParserTest.java
@@ -18,6 +18,7 @@
 
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.Comment;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.sql.Timestamp;
 import java.time.Instant;
 import java.util.ArrayList;
@@ -25,7 +26,7 @@
 import org.junit.Ignore;
 
 @Ignore
-public class AbstractParserTest {
+public class AbstractParserTest extends GerritBaseTests {
   protected static final String CHANGE_URL =
       "https://gerrit-review.googlesource.com/c/project/+/123";
 
diff --git a/javatests/com/google/gerrit/mail/MailHeaderParserTest.java b/javatests/com/google/gerrit/mail/MailHeaderParserTest.java
index 2d2c2ea..cdc8d7a 100644
--- a/javatests/com/google/gerrit/mail/MailHeaderParserTest.java
+++ b/javatests/com/google/gerrit/mail/MailHeaderParserTest.java
@@ -16,13 +16,14 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.time.Instant;
 import java.time.LocalDateTime;
 import java.time.Month;
 import java.time.ZoneOffset;
 import org.junit.Test;
 
-public class MailHeaderParserTest {
+public class MailHeaderParserTest extends GerritBaseTests {
   @Test
   public void parseMetadataFromHeader() {
     // This tests if the metadata parser is able to parse metadata from the
diff --git a/javatests/com/google/gerrit/mail/ParserUtilTest.java b/javatests/com/google/gerrit/mail/ParserUtilTest.java
index 47a5367..ed40a57 100644
--- a/javatests/com/google/gerrit/mail/ParserUtilTest.java
+++ b/javatests/com/google/gerrit/mail/ParserUtilTest.java
@@ -16,9 +16,10 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class ParserUtilTest {
+public class ParserUtilTest extends GerritBaseTests {
   @Test
   public void trimQuotationLineOnMessageWithoutQuoatationLine() throws Exception {
     assertThat(ParserUtil.trimQuotation("One line")).isEqualTo("One line");
diff --git a/javatests/com/google/gerrit/metrics/dropwizard/BUILD b/javatests/com/google/gerrit/metrics/dropwizard/BUILD
index 98d12b2..63d4452 100644
--- a/javatests/com/google/gerrit/metrics/dropwizard/BUILD
+++ b/javatests/com/google/gerrit/metrics/dropwizard/BUILD
@@ -7,6 +7,7 @@
     visibility = ["//visibility:public"],
     deps = [
         "//java/com/google/gerrit/metrics/dropwizard",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib/truth",
     ],
 )
diff --git a/javatests/com/google/gerrit/metrics/dropwizard/DropWizardMetricMakerTest.java b/javatests/com/google/gerrit/metrics/dropwizard/DropWizardMetricMakerTest.java
index 9b21bf6..d6bcb62 100644
--- a/javatests/com/google/gerrit/metrics/dropwizard/DropWizardMetricMakerTest.java
+++ b/javatests/com/google/gerrit/metrics/dropwizard/DropWizardMetricMakerTest.java
@@ -16,9 +16,10 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class DropWizardMetricMakerTest {
+public class DropWizardMetricMakerTest extends GerritBaseTests {
   DropWizardMetricMaker metrics =
       new DropWizardMetricMaker(null /* MetricRegistry unused in tests */);
 
diff --git a/javatests/com/google/gerrit/metrics/proc/BUILD b/javatests/com/google/gerrit/metrics/proc/BUILD
index 91e5cf6..7d8af90 100644
--- a/javatests/com/google/gerrit/metrics/proc/BUILD
+++ b/javatests/com/google/gerrit/metrics/proc/BUILD
@@ -9,6 +9,7 @@
         "//java/com/google/gerrit/lifecycle",
         "//java/com/google/gerrit/metrics",
         "//java/com/google/gerrit/metrics/dropwizard",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib/dropwizard:dropwizard-core",
         "//lib/guice",
         "//lib/truth",
diff --git a/javatests/com/google/gerrit/metrics/proc/ProcMetricModuleTest.java b/javatests/com/google/gerrit/metrics/proc/ProcMetricModuleTest.java
index 91b01f6..f904686 100644
--- a/javatests/com/google/gerrit/metrics/proc/ProcMetricModuleTest.java
+++ b/javatests/com/google/gerrit/metrics/proc/ProcMetricModuleTest.java
@@ -30,6 +30,7 @@
 import com.google.gerrit.metrics.Field;
 import com.google.gerrit.metrics.MetricMaker;
 import com.google.gerrit.metrics.dropwizard.DropWizardMetricMaker;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.inject.Guice;
 import com.google.inject.Inject;
 import com.google.inject.Injector;
@@ -40,7 +41,7 @@
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class ProcMetricModuleTest {
+public class ProcMetricModuleTest extends GerritBaseTests {
   @Rule public ExpectedException exception = ExpectedException.none();
 
   @Inject MetricMaker metrics;
diff --git a/javatests/com/google/gerrit/pgm/init/LibrariesTest.java b/javatests/com/google/gerrit/pgm/init/LibrariesTest.java
index af21ad0..1f42373 100644
--- a/javatests/com/google/gerrit/pgm/init/LibrariesTest.java
+++ b/javatests/com/google/gerrit/pgm/init/LibrariesTest.java
@@ -21,12 +21,13 @@
 
 import com.google.gerrit.pgm.init.api.ConsoleUI;
 import com.google.gerrit.server.config.SitePaths;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.inject.Provider;
 import java.nio.file.Paths;
 import java.util.Collections;
 import org.junit.Test;
 
-public class LibrariesTest {
+public class LibrariesTest extends GerritBaseTests {
   @Test
   public void create() throws Exception {
     final SitePaths site = new SitePaths(Paths.get("."));
diff --git a/javatests/com/google/gerrit/proto/BUILD b/javatests/com/google/gerrit/proto/BUILD
index 0940f6b..a249638 100644
--- a/javatests/com/google/gerrit/proto/BUILD
+++ b/javatests/com/google/gerrit/proto/BUILD
@@ -4,6 +4,7 @@
     name = "proto_tests",
     srcs = glob(["*.java"]),
     deps = [
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib/truth:truth-proto-extension",
         "//proto:reviewdb_java_proto",
 
diff --git a/javatests/com/google/gerrit/proto/ReviewDbProtoTest.java b/javatests/com/google/gerrit/proto/ReviewDbProtoTest.java
index 49cd2921..d6ffee5 100644
--- a/javatests/com/google/gerrit/proto/ReviewDbProtoTest.java
+++ b/javatests/com/google/gerrit/proto/ReviewDbProtoTest.java
@@ -18,9 +18,10 @@
 
 import com.google.gerrit.proto.reviewdb.Reviewdb.Change;
 import com.google.gerrit.proto.reviewdb.Reviewdb.Change_Id;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class ReviewDbProtoTest {
+public class ReviewDbProtoTest extends GerritBaseTests {
   @Test
   public void generatedProtoApi() {
     Change c1 = Change.newBuilder().setChangeId(Change_Id.newBuilder().setId(1234).build()).build();
diff --git a/javatests/com/google/gerrit/server/ChangeUtilTest.java b/javatests/com/google/gerrit/server/ChangeUtilTest.java
index 5f73d2c..5cb474d 100644
--- a/javatests/com/google/gerrit/server/ChangeUtilTest.java
+++ b/javatests/com/google/gerrit/server/ChangeUtilTest.java
@@ -16,10 +16,11 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.regex.Pattern;
 import org.junit.Test;
 
-public class ChangeUtilTest {
+public class ChangeUtilTest extends GerritBaseTests {
   @Test
   public void changeMessageUuid() throws Exception {
     Pattern pat = Pattern.compile("^[0-9a-f]{8}_[0-9a-f]{8}$");
diff --git a/javatests/com/google/gerrit/server/IdentifiedUserTest.java b/javatests/com/google/gerrit/server/IdentifiedUserTest.java
index da6c56d..a8daac3 100644
--- a/javatests/com/google/gerrit/server/IdentifiedUserTest.java
+++ b/javatests/com/google/gerrit/server/IdentifiedUserTest.java
@@ -31,6 +31,7 @@
 import com.google.gerrit.server.util.time.TimeUtil;
 import com.google.gerrit.testing.ConfigSuite;
 import com.google.gerrit.testing.FakeAccountCache;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.inject.AbstractModule;
 import com.google.inject.Guice;
 import com.google.inject.Inject;
@@ -44,7 +45,7 @@
 import org.junit.runner.RunWith;
 
 @RunWith(ConfigSuite.class)
-public class IdentifiedUserTest {
+public class IdentifiedUserTest extends GerritBaseTests {
   @ConfigSuite.Parameter public Config config;
 
   private IdentifiedUser identifiedUser;
diff --git a/javatests/com/google/gerrit/server/account/AuthorizedKeysTest.java b/javatests/com/google/gerrit/server/account/AuthorizedKeysTest.java
index 80a15a3..fff8a86 100644
--- a/javatests/com/google/gerrit/server/account/AuthorizedKeysTest.java
+++ b/javatests/com/google/gerrit/server/account/AuthorizedKeysTest.java
@@ -17,12 +17,13 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.gerrit.reviewdb.client.Account;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
 import org.junit.Test;
 
-public class AuthorizedKeysTest {
+public class AuthorizedKeysTest extends GerritBaseTests {
   private static final String KEY1 =
       "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAAgQCgug5VyMXQGnem2H1KVC4/HcRcD4zzBqS"
           + "uJBRWVonSSoz3RoAZ7bWXCVVGwchtXwUURD689wFYdiPecOrWOUgeeyRq754YWRhU+W28"
diff --git a/javatests/com/google/gerrit/server/account/GroupUUIDTest.java b/javatests/com/google/gerrit/server/account/GroupUUIDTest.java
index 3b72b08..70887e6 100644
--- a/javatests/com/google/gerrit/server/account/GroupUUIDTest.java
+++ b/javatests/com/google/gerrit/server/account/GroupUUIDTest.java
@@ -17,10 +17,11 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.gerrit.reviewdb.client.AccountGroup;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.eclipse.jgit.lib.PersonIdent;
 import org.junit.Test;
 
-public class GroupUUIDTest {
+public class GroupUUIDTest extends GerritBaseTests {
   @Test
   public void createdUuidsForSameInputShouldBeDifferent() {
     String groupName = "Users";
diff --git a/javatests/com/google/gerrit/server/account/HashedPasswordTest.java b/javatests/com/google/gerrit/server/account/HashedPasswordTest.java
index 4955c06..9a0c9cb9 100644
--- a/javatests/com/google/gerrit/server/account/HashedPasswordTest.java
+++ b/javatests/com/google/gerrit/server/account/HashedPasswordTest.java
@@ -17,10 +17,11 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.common.base.Strings;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.apache.commons.codec.DecoderException;
 import org.junit.Test;
 
-public class HashedPasswordTest {
+public class HashedPasswordTest extends GerritBaseTests {
 
   @Test
   public void encodeOneLine() throws Exception {
diff --git a/javatests/com/google/gerrit/server/account/externalids/AllExternalIdsTest.java b/javatests/com/google/gerrit/server/account/externalids/AllExternalIdsTest.java
index f29ff1f..edf6bdd 100644
--- a/javatests/com/google/gerrit/server/account/externalids/AllExternalIdsTest.java
+++ b/javatests/com/google/gerrit/server/account/externalids/AllExternalIdsTest.java
@@ -25,12 +25,13 @@
 import com.google.gerrit.server.account.externalids.AllExternalIds.Serializer;
 import com.google.gerrit.server.cache.proto.Cache.AllExternalIdsProto;
 import com.google.gerrit.server.cache.proto.Cache.AllExternalIdsProto.ExternalIdProto;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.inject.TypeLiteral;
 import java.util.Arrays;
 import org.eclipse.jgit.lib.ObjectId;
 import org.junit.Test;
 
-public class AllExternalIdsTest {
+public class AllExternalIdsTest extends GerritBaseTests {
   @Test
   public void serializeEmptyExternalIds() throws Exception {
     assertRoundTrip(allExternalIds(), AllExternalIdsProto.getDefaultInstance());
diff --git a/javatests/com/google/gerrit/server/cache/BUILD b/javatests/com/google/gerrit/server/cache/BUILD
index 4950266..c255e61 100644
--- a/javatests/com/google/gerrit/server/cache/BUILD
+++ b/javatests/com/google/gerrit/server/cache/BUILD
@@ -5,6 +5,7 @@
     srcs = glob(["*.java"]),
     deps = [
         "//java/com/google/gerrit/server",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib:junit",
         "//lib/truth",
     ],
diff --git a/javatests/com/google/gerrit/server/cache/PerThreadCacheTest.java b/javatests/com/google/gerrit/server/cache/PerThreadCacheTest.java
index cfb5f3f..8f4f23f 100644
--- a/javatests/com/google/gerrit/server/cache/PerThreadCacheTest.java
+++ b/javatests/com/google/gerrit/server/cache/PerThreadCacheTest.java
@@ -16,12 +16,13 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.function.Supplier;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class PerThreadCacheTest {
+public class PerThreadCacheTest extends GerritBaseTests {
   @Rule public ExpectedException exception = ExpectedException.none();
 
   @Test
diff --git a/javatests/com/google/gerrit/server/cache/serialize/BUILD b/javatests/com/google/gerrit/server/cache/serialize/BUILD
index 35d8527..ddad4b9 100644
--- a/javatests/com/google/gerrit/server/cache/serialize/BUILD
+++ b/javatests/com/google/gerrit/server/cache/serialize/BUILD
@@ -6,6 +6,7 @@
     deps = [
         "//java/com/google/gerrit/server/cache/serialize",
         "//java/com/google/gerrit/server/cache/testing",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib:guava",
         "//lib:gwtorm",
         "//lib:junit",
diff --git a/javatests/com/google/gerrit/server/cache/serialize/BooleanCacheSerializerTest.java b/javatests/com/google/gerrit/server/cache/serialize/BooleanCacheSerializerTest.java
index 7504850..c634a78 100644
--- a/javatests/com/google/gerrit/server/cache/serialize/BooleanCacheSerializerTest.java
+++ b/javatests/com/google/gerrit/server/cache/serialize/BooleanCacheSerializerTest.java
@@ -18,10 +18,11 @@
 import static com.google.common.truth.Truth.assert_;
 import static java.nio.charset.StandardCharsets.UTF_8;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.protobuf.TextFormat;
 import org.junit.Test;
 
-public class BooleanCacheSerializerTest {
+public class BooleanCacheSerializerTest extends GerritBaseTests {
   @Test
   public void serialize() throws Exception {
     assertThat(BooleanCacheSerializer.INSTANCE.serialize(true))
diff --git a/javatests/com/google/gerrit/server/cache/serialize/EnumCacheSerializerTest.java b/javatests/com/google/gerrit/server/cache/serialize/EnumCacheSerializerTest.java
index 0b80fc7..c6efc21 100644
--- a/javatests/com/google/gerrit/server/cache/serialize/EnumCacheSerializerTest.java
+++ b/javatests/com/google/gerrit/server/cache/serialize/EnumCacheSerializerTest.java
@@ -18,9 +18,10 @@
 import static com.google.common.truth.Truth.assert_;
 import static java.nio.charset.StandardCharsets.UTF_8;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class EnumCacheSerializerTest {
+public class EnumCacheSerializerTest extends GerritBaseTests {
   @Test
   public void serialize() throws Exception {
     assertRoundTrip(MyEnum.FOO);
diff --git a/javatests/com/google/gerrit/server/cache/serialize/IntKeyCacheSerializerTest.java b/javatests/com/google/gerrit/server/cache/serialize/IntKeyCacheSerializerTest.java
index 987a62a..56dd6ad 100644
--- a/javatests/com/google/gerrit/server/cache/serialize/IntKeyCacheSerializerTest.java
+++ b/javatests/com/google/gerrit/server/cache/serialize/IntKeyCacheSerializerTest.java
@@ -17,11 +17,12 @@
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth.assert_;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gwtorm.client.IntKey;
 import com.google.gwtorm.client.Key;
 import org.junit.Test;
 
-public class IntKeyCacheSerializerTest {
+public class IntKeyCacheSerializerTest extends GerritBaseTests {
 
   private static class MyIntKey extends IntKey<Key<?>> {
     private static final long serialVersionUID = 1L;
diff --git a/javatests/com/google/gerrit/server/cache/serialize/IntegerCacheSerializerTest.java b/javatests/com/google/gerrit/server/cache/serialize/IntegerCacheSerializerTest.java
index c2db808..1d54010 100644
--- a/javatests/com/google/gerrit/server/cache/serialize/IntegerCacheSerializerTest.java
+++ b/javatests/com/google/gerrit/server/cache/serialize/IntegerCacheSerializerTest.java
@@ -19,10 +19,11 @@
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.primitives.Bytes;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.protobuf.TextFormat;
 import org.junit.Test;
 
-public class IntegerCacheSerializerTest {
+public class IntegerCacheSerializerTest extends GerritBaseTests {
   @Test
   public void serialize() throws Exception {
     for (int i :
diff --git a/javatests/com/google/gerrit/server/cache/serialize/JavaCacheSerializerTest.java b/javatests/com/google/gerrit/server/cache/serialize/JavaCacheSerializerTest.java
index 6596730..9fcb8a4 100644
--- a/javatests/com/google/gerrit/server/cache/serialize/JavaCacheSerializerTest.java
+++ b/javatests/com/google/gerrit/server/cache/serialize/JavaCacheSerializerTest.java
@@ -17,10 +17,11 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.auto.value.AutoValue;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.io.Serializable;
 import org.junit.Test;
 
-public class JavaCacheSerializerTest {
+public class JavaCacheSerializerTest extends GerritBaseTests {
   @Test
   public void builtInTypes() throws Exception {
     assertRoundTrip("foo");
diff --git a/javatests/com/google/gerrit/server/cache/serialize/ObjectIdCacheSerializerTest.java b/javatests/com/google/gerrit/server/cache/serialize/ObjectIdCacheSerializerTest.java
index c56f8f8..257be54 100644
--- a/javatests/com/google/gerrit/server/cache/serialize/ObjectIdCacheSerializerTest.java
+++ b/javatests/com/google/gerrit/server/cache/serialize/ObjectIdCacheSerializerTest.java
@@ -18,10 +18,11 @@
 import static com.google.common.truth.Truth.assert_;
 import static com.google.gerrit.server.cache.testing.CacheSerializerTestUtil.byteArray;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.eclipse.jgit.lib.ObjectId;
 import org.junit.Test;
 
-public class ObjectIdCacheSerializerTest {
+public class ObjectIdCacheSerializerTest extends GerritBaseTests {
   @Test
   public void serialize() {
     ObjectId id = ObjectId.fromString("aabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
diff --git a/javatests/com/google/gerrit/server/cache/serialize/ProtoCacheSerializersTest.java b/javatests/com/google/gerrit/server/cache/serialize/ProtoCacheSerializersTest.java
index 69694fe..8a02af2 100644
--- a/javatests/com/google/gerrit/server/cache/serialize/ProtoCacheSerializersTest.java
+++ b/javatests/com/google/gerrit/server/cache/serialize/ProtoCacheSerializersTest.java
@@ -22,11 +22,12 @@
 import com.google.gerrit.server.cache.proto.Cache.ChangeNotesKeyProto;
 import com.google.gerrit.server.cache.proto.Cache.ChangeNotesStateProto;
 import com.google.gerrit.server.cache.serialize.ProtoCacheSerializers.ObjectIdConverter;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.protobuf.ByteString;
 import org.eclipse.jgit.lib.ObjectId;
 import org.junit.Test;
 
-public class ProtoCacheSerializersTest {
+public class ProtoCacheSerializersTest extends GerritBaseTests {
   @Test
   public void objectIdFromByteString() {
     ObjectIdConverter idConverter = ObjectIdConverter.create();
diff --git a/javatests/com/google/gerrit/server/cache/serialize/StringCacheSerializerTest.java b/javatests/com/google/gerrit/server/cache/serialize/StringCacheSerializerTest.java
index fa3b7d7..ff0cf9a 100644
--- a/javatests/com/google/gerrit/server/cache/serialize/StringCacheSerializerTest.java
+++ b/javatests/com/google/gerrit/server/cache/serialize/StringCacheSerializerTest.java
@@ -17,11 +17,12 @@
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth.assert_;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.nio.charset.CharacterCodingException;
 import java.nio.charset.StandardCharsets;
 import org.junit.Test;
 
-public class StringCacheSerializerTest {
+public class StringCacheSerializerTest extends GerritBaseTests {
   @Test
   public void serialize() {
     assertThat(StringCacheSerializer.INSTANCE.serialize("")).isEmpty();
diff --git a/javatests/com/google/gerrit/server/change/ChangeKindCacheImplTest.java b/javatests/com/google/gerrit/server/change/ChangeKindCacheImplTest.java
index b847ed7..335ff12 100644
--- a/javatests/com/google/gerrit/server/change/ChangeKindCacheImplTest.java
+++ b/javatests/com/google/gerrit/server/change/ChangeKindCacheImplTest.java
@@ -23,10 +23,11 @@
 import com.google.gerrit.server.cache.proto.Cache.ChangeKindKeyProto;
 import com.google.gerrit.server.cache.serialize.CacheSerializer;
 import com.google.gerrit.server.change.ChangeKindCacheImpl.Key;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.eclipse.jgit.lib.ObjectId;
 import org.junit.Test;
 
-public class ChangeKindCacheImplTest {
+public class ChangeKindCacheImplTest extends GerritBaseTests {
   @Test
   public void keySerializer() throws Exception {
     ChangeKindCacheImpl.Key key =
diff --git a/javatests/com/google/gerrit/server/change/HashtagsTest.java b/javatests/com/google/gerrit/server/change/HashtagsTest.java
index 780ac71..49d2952 100644
--- a/javatests/com/google/gerrit/server/change/HashtagsTest.java
+++ b/javatests/com/google/gerrit/server/change/HashtagsTest.java
@@ -17,9 +17,10 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.common.collect.Sets;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class HashtagsTest {
+public class HashtagsTest extends GerritBaseTests {
   @Test
   public void emptyCommitMessage() throws Exception {
     assertThat(HashtagsUtil.extractTags("")).isEmpty();
diff --git a/javatests/com/google/gerrit/server/change/LabelNormalizerTest.java b/javatests/com/google/gerrit/server/change/LabelNormalizerTest.java
index 842a5b0..fe980f9 100644
--- a/javatests/com/google/gerrit/server/change/LabelNormalizerTest.java
+++ b/javatests/com/google/gerrit/server/change/LabelNormalizerTest.java
@@ -48,6 +48,7 @@
 import com.google.gerrit.server.util.RequestContext;
 import com.google.gerrit.server.util.ThreadLocalRequestContext;
 import com.google.gerrit.server.util.time.TimeUtil;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.InMemoryDatabase;
 import com.google.gerrit.testing.InMemoryModule;
 import com.google.inject.Guice;
@@ -62,7 +63,7 @@
 import org.junit.Test;
 
 /** Unit tests for {@link LabelNormalizer}. */
-public class LabelNormalizerTest {
+public class LabelNormalizerTest extends GerritBaseTests {
   @Inject private AccountManager accountManager;
   @Inject private AllProjectsName allProjects;
   @Inject private GitRepositoryManager repoManager;
diff --git a/javatests/com/google/gerrit/server/change/MergeabilityCacheImplTest.java b/javatests/com/google/gerrit/server/change/MergeabilityCacheImplTest.java
index e10a236..c5d35f6 100644
--- a/javatests/com/google/gerrit/server/change/MergeabilityCacheImplTest.java
+++ b/javatests/com/google/gerrit/server/change/MergeabilityCacheImplTest.java
@@ -22,10 +22,11 @@
 import com.google.common.collect.ImmutableMap;
 import com.google.gerrit.extensions.client.SubmitType;
 import com.google.gerrit.server.cache.proto.Cache.MergeabilityKeyProto;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.eclipse.jgit.lib.ObjectId;
 import org.junit.Test;
 
-public class MergeabilityCacheImplTest {
+public class MergeabilityCacheImplTest extends GerritBaseTests {
   @Test
   public void keySerializer() throws Exception {
     MergeabilityCacheImpl.EntryKey key =
diff --git a/javatests/com/google/gerrit/server/config/ConfigUtilTest.java b/javatests/com/google/gerrit/server/config/ConfigUtilTest.java
index 231b584..75fb94e 100644
--- a/javatests/com/google/gerrit/server/config/ConfigUtilTest.java
+++ b/javatests/com/google/gerrit/server/config/ConfigUtilTest.java
@@ -22,13 +22,14 @@
 import static java.util.concurrent.TimeUnit.SECONDS;
 
 import com.google.gerrit.extensions.client.Theme;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
 import org.eclipse.jgit.lib.Config;
 import org.junit.Test;
 
-public class ConfigUtilTest {
+public class ConfigUtilTest extends GerritBaseTests {
   private static final String SECT = "foo";
   private static final String SUB = "bar";
 
diff --git a/javatests/com/google/gerrit/server/config/GitwebConfigTest.java b/javatests/com/google/gerrit/server/config/GitwebConfigTest.java
index cb6de34..bf7e4fd 100644
--- a/javatests/com/google/gerrit/server/config/GitwebConfigTest.java
+++ b/javatests/com/google/gerrit/server/config/GitwebConfigTest.java
@@ -16,9 +16,10 @@
 
 import static com.google.common.truth.Truth.assertWithMessage;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class GitwebConfigTest {
+public class GitwebConfigTest extends GerritBaseTests {
   private static final String VALID_CHARACTERS = "*()";
   private static final String SOME_INVALID_CHARACTERS = "09AZaz$-_.+!',";
 
diff --git a/javatests/com/google/gerrit/server/config/ListCapabilitiesTest.java b/javatests/com/google/gerrit/server/config/ListCapabilitiesTest.java
index fd9c925..a4a196b 100644
--- a/javatests/com/google/gerrit/server/config/ListCapabilitiesTest.java
+++ b/javatests/com/google/gerrit/server/config/ListCapabilitiesTest.java
@@ -25,6 +25,7 @@
 import com.google.gerrit.server.permissions.PermissionBackend;
 import com.google.gerrit.server.restapi.config.ListCapabilities;
 import com.google.gerrit.server.restapi.config.ListCapabilities.CapabilityInfo;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.inject.AbstractModule;
 import com.google.inject.Guice;
 import com.google.inject.Injector;
@@ -33,7 +34,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class ListCapabilitiesTest {
+public class ListCapabilitiesTest extends GerritBaseTests {
   private Injector injector;
 
   @Before
diff --git a/javatests/com/google/gerrit/server/config/RepositoryConfigTest.java b/javatests/com/google/gerrit/server/config/RepositoryConfigTest.java
index 3da35b2..2a473f4 100644
--- a/javatests/com/google/gerrit/server/config/RepositoryConfigTest.java
+++ b/javatests/com/google/gerrit/server/config/RepositoryConfigTest.java
@@ -20,6 +20,7 @@
 import com.google.common.collect.ImmutableList;
 import com.google.gerrit.extensions.client.SubmitType;
 import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.List;
@@ -27,7 +28,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class RepositoryConfigTest {
+public class RepositoryConfigTest extends GerritBaseTests {
 
   private Config cfg;
   private RepositoryConfig repoCfg;
diff --git a/javatests/com/google/gerrit/server/config/ScheduleConfigTest.java b/javatests/com/google/gerrit/server/config/ScheduleConfigTest.java
index 70893a9..f0e9153 100644
--- a/javatests/com/google/gerrit/server/config/ScheduleConfigTest.java
+++ b/javatests/com/google/gerrit/server/config/ScheduleConfigTest.java
@@ -22,6 +22,7 @@
 import static java.util.concurrent.TimeUnit.MINUTES;
 
 import com.google.gerrit.server.config.ScheduleConfig.Schedule;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.time.LocalDateTime;
 import java.time.Month;
 import java.time.ZoneOffset;
@@ -31,7 +32,7 @@
 import org.eclipse.jgit.lib.Config;
 import org.junit.Test;
 
-public class ScheduleConfigTest {
+public class ScheduleConfigTest extends GerritBaseTests {
 
   // Friday June 13, 2014 10:00 UTC
   private static final ZonedDateTime NOW =
diff --git a/javatests/com/google/gerrit/server/edit/ChangeEditTest.java b/javatests/com/google/gerrit/server/edit/ChangeEditTest.java
index 6509c4b..4c0b5a1 100644
--- a/javatests/com/google/gerrit/server/edit/ChangeEditTest.java
+++ b/javatests/com/google/gerrit/server/edit/ChangeEditTest.java
@@ -20,9 +20,10 @@
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.RefNames;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class ChangeEditTest {
+public class ChangeEditTest extends GerritBaseTests {
   @Test
   public void changeEditRef() throws Exception {
     Account.Id accountId = new Account.Id(1000042);
diff --git a/javatests/com/google/gerrit/server/events/EventDeserializerTest.java b/javatests/com/google/gerrit/server/events/EventDeserializerTest.java
index 997fda9..0e63715 100644
--- a/javatests/com/google/gerrit/server/events/EventDeserializerTest.java
+++ b/javatests/com/google/gerrit/server/events/EventDeserializerTest.java
@@ -20,11 +20,12 @@
 import com.google.common.base.Suppliers;
 import com.google.gerrit.server.data.AccountAttribute;
 import com.google.gerrit.server.data.RefUpdateAttribute;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import org.junit.Test;
 
-public class EventDeserializerTest {
+public class EventDeserializerTest extends GerritBaseTests {
 
   @Test
   public void refUpdatedEvent() {
diff --git a/javatests/com/google/gerrit/server/events/EventTypesTest.java b/javatests/com/google/gerrit/server/events/EventTypesTest.java
index c822d6c..dd5c7f9 100644
--- a/javatests/com/google/gerrit/server/events/EventTypesTest.java
+++ b/javatests/com/google/gerrit/server/events/EventTypesTest.java
@@ -16,9 +16,10 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class EventTypesTest {
+public class EventTypesTest extends GerritBaseTests {
   public static class TestEvent extends Event {
     private static final String TYPE = "test-event";
 
diff --git a/javatests/com/google/gerrit/server/extensions/webui/UiActionsTest.java b/javatests/com/google/gerrit/server/extensions/webui/UiActionsTest.java
index 08d7082..6c5c5b0 100644
--- a/javatests/com/google/gerrit/server/extensions/webui/UiActionsTest.java
+++ b/javatests/com/google/gerrit/server/extensions/webui/UiActionsTest.java
@@ -30,6 +30,7 @@
 import com.google.gerrit.server.permissions.PermissionBackendCondition;
 import com.google.gerrit.server.permissions.PermissionBackendException;
 import com.google.gerrit.server.permissions.ProjectPermission;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.Collection;
 import java.util.Map;
 import java.util.Set;
@@ -38,7 +39,7 @@
 import org.eclipse.jgit.lib.Repository;
 import org.junit.Test;
 
-public class UiActionsTest {
+public class UiActionsTest extends GerritBaseTests {
 
   private static class FakeForProject extends ForProject {
     private boolean allowValueQueries = true;
diff --git a/javatests/com/google/gerrit/server/fixes/FixReplacementInterpreterTest.java b/javatests/com/google/gerrit/server/fixes/FixReplacementInterpreterTest.java
index c1a65bb..2866c91 100644
--- a/javatests/com/google/gerrit/server/fixes/FixReplacementInterpreterTest.java
+++ b/javatests/com/google/gerrit/server/fixes/FixReplacementInterpreterTest.java
@@ -26,6 +26,7 @@
 import com.google.gerrit.server.change.FileContentUtil;
 import com.google.gerrit.server.edit.tree.TreeModification;
 import com.google.gerrit.server.project.ProjectState;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.List;
@@ -37,7 +38,7 @@
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class FixReplacementInterpreterTest {
+public class FixReplacementInterpreterTest extends GerritBaseTests {
 
   @Rule public ExpectedException expectedException = ExpectedException.none();
 
diff --git a/javatests/com/google/gerrit/server/fixes/LineIdentifierTest.java b/javatests/com/google/gerrit/server/fixes/LineIdentifierTest.java
index f638346..67acc12 100644
--- a/javatests/com/google/gerrit/server/fixes/LineIdentifierTest.java
+++ b/javatests/com/google/gerrit/server/fixes/LineIdentifierTest.java
@@ -16,11 +16,12 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class LineIdentifierTest {
+public class LineIdentifierTest extends GerritBaseTests {
 
   @Rule public ExpectedException expectedException = ExpectedException.none();
 
diff --git a/javatests/com/google/gerrit/server/fixes/StringModifierTest.java b/javatests/com/google/gerrit/server/fixes/StringModifierTest.java
index d23e928..1cfd935 100644
--- a/javatests/com/google/gerrit/server/fixes/StringModifierTest.java
+++ b/javatests/com/google/gerrit/server/fixes/StringModifierTest.java
@@ -16,12 +16,13 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class StringModifierTest {
+public class StringModifierTest extends GerritBaseTests {
 
   @Rule public ExpectedException expectedException = ExpectedException.none();
 
diff --git a/javatests/com/google/gerrit/server/git/GroupCollectorTest.java b/javatests/com/google/gerrit/server/git/GroupCollectorTest.java
index e5e8e26..f694299 100644
--- a/javatests/com/google/gerrit/server/git/GroupCollectorTest.java
+++ b/javatests/com/google/gerrit/server/git/GroupCollectorTest.java
@@ -21,6 +21,7 @@
 import com.google.common.collect.SortedSetMultimap;
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.PatchSet;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.eclipse.jgit.internal.storage.dfs.DfsRepositoryDescription;
 import org.eclipse.jgit.internal.storage.dfs.InMemoryRepository;
 import org.eclipse.jgit.junit.TestRepository;
@@ -31,7 +32,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class GroupCollectorTest {
+public class GroupCollectorTest extends GerritBaseTests {
   private TestRepository<?> tr;
 
   @Before
diff --git a/javatests/com/google/gerrit/server/git/TagSetHolderTest.java b/javatests/com/google/gerrit/server/git/TagSetHolderTest.java
index 3d3e734..705139a 100644
--- a/javatests/com/google/gerrit/server/git/TagSetHolderTest.java
+++ b/javatests/com/google/gerrit/server/git/TagSetHolderTest.java
@@ -21,9 +21,10 @@
 import com.google.common.collect.ImmutableMap;
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.server.cache.proto.Cache.TagSetHolderProto;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class TagSetHolderTest {
+public class TagSetHolderTest extends GerritBaseTests {
   @Test
   public void serializerWithTagSet() throws Exception {
     TagSetHolder holder = new TagSetHolder(new Project.NameKey("project"));
diff --git a/javatests/com/google/gerrit/server/git/TagSetTest.java b/javatests/com/google/gerrit/server/git/TagSetTest.java
index 1eebe75..1314ce6 100644
--- a/javatests/com/google/gerrit/server/git/TagSetTest.java
+++ b/javatests/com/google/gerrit/server/git/TagSetTest.java
@@ -30,6 +30,7 @@
 import com.google.gerrit.server.cache.proto.Cache.TagSetHolderProto.TagSetProto.TagProto;
 import com.google.gerrit.server.git.TagSet.CachedRef;
 import com.google.gerrit.server.git.TagSet.Tag;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.inject.TypeLiteral;
 import java.lang.reflect.Type;
 import java.util.Arrays;
@@ -42,7 +43,7 @@
 import org.eclipse.jgit.lib.ObjectIdOwnerMap;
 import org.junit.Test;
 
-public class TagSetTest {
+public class TagSetTest extends GerritBaseTests {
   @Test
   public void roundTripToProto() {
     HashMap<String, CachedRef> refs = new HashMap<>();
diff --git a/javatests/com/google/gerrit/server/git/meta/VersionedMetaDataTest.java b/javatests/com/google/gerrit/server/git/meta/VersionedMetaDataTest.java
index 7ed6c50..dedccc2 100644
--- a/javatests/com/google/gerrit/server/git/meta/VersionedMetaDataTest.java
+++ b/javatests/com/google/gerrit/server/git/meta/VersionedMetaDataTest.java
@@ -27,6 +27,7 @@
 import com.google.gerrit.server.extensions.events.GitReferenceUpdated;
 import com.google.gerrit.server.git.meta.VersionedMetaData.BatchMetaDataUpdate;
 import com.google.gerrit.server.util.time.TimeUtil;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.TestTimeUtil;
 import java.io.IOException;
 import java.util.Arrays;
@@ -50,7 +51,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class VersionedMetaDataTest {
+public class VersionedMetaDataTest extends GerritBaseTests {
   // If you're considering fleshing out this test and making it more comprehensive, please consider
   // instead coming up with a replacement interface for
   // VersionedMetaData/BatchMetaDataUpdate/MetaDataUpdate that is easier to use correctly.
diff --git a/javatests/com/google/gerrit/server/group/db/GroupConfigTest.java b/javatests/com/google/gerrit/server/group/db/GroupConfigTest.java
index a5744d1..b4d4df2 100644
--- a/javatests/com/google/gerrit/server/group/db/GroupConfigTest.java
+++ b/javatests/com/google/gerrit/server/group/db/GroupConfigTest.java
@@ -32,6 +32,7 @@
 import com.google.gerrit.server.group.InternalGroup;
 import com.google.gerrit.server.group.testing.InternalGroupSubject;
 import com.google.gerrit.server.util.time.TimeUtil;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.truth.OptionalSubject;
 import com.google.gwtorm.client.KeyUtil;
 import com.google.gwtorm.server.StandardKeyEncoder;
@@ -57,7 +58,7 @@
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class GroupConfigTest {
+public class GroupConfigTest extends GerritBaseTests {
   static {
     // Necessary so that toString() methods of ReviewDb entities work correctly.
     KeyUtil.setEncoderImpl(new StandardKeyEncoder());
diff --git a/javatests/com/google/gerrit/server/group/db/GroupNameNotesTest.java b/javatests/com/google/gerrit/server/group/db/GroupNameNotesTest.java
index 7364c95..0dda50a 100644
--- a/javatests/com/google/gerrit/server/group/db/GroupNameNotesTest.java
+++ b/javatests/com/google/gerrit/server/group/db/GroupNameNotesTest.java
@@ -36,6 +36,7 @@
 import com.google.gerrit.server.extensions.events.GitReferenceUpdated;
 import com.google.gerrit.server.git.meta.MetaDataUpdate;
 import com.google.gerrit.server.util.time.TimeUtil;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.GitTestUtil;
 import com.google.gerrit.testing.TestTimeUtil;
 import com.google.gerrit.truth.ListSubject;
@@ -70,7 +71,7 @@
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class GroupNameNotesTest {
+public class GroupNameNotesTest extends GerritBaseTests {
   static {
     KeyUtil.setEncoderImpl(new StandardKeyEncoder());
   }
diff --git a/javatests/com/google/gerrit/server/ioutil/BUILD b/javatests/com/google/gerrit/server/ioutil/BUILD
index ac9530f..ef02243 100644
--- a/javatests/com/google/gerrit/server/ioutil/BUILD
+++ b/javatests/com/google/gerrit/server/ioutil/BUILD
@@ -10,6 +10,7 @@
     visibility = ["//visibility:public"],
     deps = [
         "//java/com/google/gerrit/server/ioutil",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib:guava",
         "//lib/truth",
         "//lib/truth:truth-java8-extension",
diff --git a/javatests/com/google/gerrit/server/ioutil/BasicSerializationTest.java b/javatests/com/google/gerrit/server/ioutil/BasicSerializationTest.java
index fae8559..c4f32c7 100644
--- a/javatests/com/google/gerrit/server/ioutil/BasicSerializationTest.java
+++ b/javatests/com/google/gerrit/server/ioutil/BasicSerializationTest.java
@@ -23,13 +23,14 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import org.junit.Test;
 
-public class BasicSerializationTest {
+public class BasicSerializationTest extends GerritBaseTests {
   @Test
   public void testReadVarInt32() throws IOException {
     assertEquals(0x00000000, readVarInt32(r(b(0))));
diff --git a/javatests/com/google/gerrit/server/ioutil/ColumnFormatterTest.java b/javatests/com/google/gerrit/server/ioutil/ColumnFormatterTest.java
index fe642ba..9f5e60a 100644
--- a/javatests/com/google/gerrit/server/ioutil/ColumnFormatterTest.java
+++ b/javatests/com/google/gerrit/server/ioutil/ColumnFormatterTest.java
@@ -14,12 +14,13 @@
 
 package com.google.gerrit.server.ioutil;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.io.PrintWriter;
 import java.io.StringWriter;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class ColumnFormatterTest {
+public class ColumnFormatterTest extends GerritBaseTests {
   /**
    * Holds an in-memory {@link java.io.PrintWriter} object and allows comparisons of its contents to
    * a supplied string via an assert statement.
diff --git a/javatests/com/google/gerrit/server/ioutil/HexFormatTest.java b/javatests/com/google/gerrit/server/ioutil/HexFormatTest.java
index 9bb6951..40fd71f 100644
--- a/javatests/com/google/gerrit/server/ioutil/HexFormatTest.java
+++ b/javatests/com/google/gerrit/server/ioutil/HexFormatTest.java
@@ -16,9 +16,10 @@
 
 import static org.junit.Assert.assertEquals;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class HexFormatTest {
+public class HexFormatTest extends GerritBaseTests {
 
   @Test
   public void fromInt() {
diff --git a/javatests/com/google/gerrit/server/ioutil/RegexListSearcherTest.java b/javatests/com/google/gerrit/server/ioutil/RegexListSearcherTest.java
index 3043985..33b1c4f 100644
--- a/javatests/com/google/gerrit/server/ioutil/RegexListSearcherTest.java
+++ b/javatests/com/google/gerrit/server/ioutil/RegexListSearcherTest.java
@@ -18,10 +18,11 @@
 import static com.google.common.truth.Truth8.assertThat;
 
 import com.google.common.collect.ImmutableList;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.List;
 import org.junit.Test;
 
-public class RegexListSearcherTest {
+public class RegexListSearcherTest extends GerritBaseTests {
   private static final ImmutableList<String> EMPTY = ImmutableList.of();
 
   @Test
diff --git a/javatests/com/google/gerrit/server/ioutil/StringUtilTest.java b/javatests/com/google/gerrit/server/ioutil/StringUtilTest.java
index 04f806d..817b317 100644
--- a/javatests/com/google/gerrit/server/ioutil/StringUtilTest.java
+++ b/javatests/com/google/gerrit/server/ioutil/StringUtilTest.java
@@ -16,9 +16,10 @@
 
 import static org.junit.Assert.assertEquals;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class StringUtilTest {
+public class StringUtilTest extends GerritBaseTests {
   /** Test the boundary condition that the first character of a string should be escaped. */
   @Test
   public void escapeFirstChar() {
diff --git a/javatests/com/google/gerrit/server/logging/LoggingContextAwareExecutorServiceTest.java b/javatests/com/google/gerrit/server/logging/LoggingContextAwareExecutorServiceTest.java
index 5117c01..463decf 100644
--- a/javatests/com/google/gerrit/server/logging/LoggingContextAwareExecutorServiceTest.java
+++ b/javatests/com/google/gerrit/server/logging/LoggingContextAwareExecutorServiceTest.java
@@ -17,6 +17,7 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.common.truth.Expect;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.SortedMap;
 import java.util.SortedSet;
 import java.util.concurrent.ExecutorService;
@@ -24,7 +25,7 @@
 import org.junit.Rule;
 import org.junit.Test;
 
-public class LoggingContextAwareExecutorServiceTest {
+public class LoggingContextAwareExecutorServiceTest extends GerritBaseTests {
   @Rule public final Expect expect = Expect.create();
 
   @Test
diff --git a/javatests/com/google/gerrit/server/logging/MutableTagsTest.java b/javatests/com/google/gerrit/server/logging/MutableTagsTest.java
index 4fadbb4..113f26c 100644
--- a/javatests/com/google/gerrit/server/logging/MutableTagsTest.java
+++ b/javatests/com/google/gerrit/server/logging/MutableTagsTest.java
@@ -20,13 +20,14 @@
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.ImmutableSetMultimap;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.Map;
 import java.util.SortedMap;
 import java.util.SortedSet;
 import org.junit.Before;
 import org.junit.Test;
 
-public class MutableTagsTest {
+public class MutableTagsTest extends GerritBaseTests {
   private MutableTags tags;
 
   @Before
diff --git a/javatests/com/google/gerrit/server/logging/TraceContextTest.java b/javatests/com/google/gerrit/server/logging/TraceContextTest.java
index 044d237..19b2eeb 100644
--- a/javatests/com/google/gerrit/server/logging/TraceContextTest.java
+++ b/javatests/com/google/gerrit/server/logging/TraceContextTest.java
@@ -19,13 +19,14 @@
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;
 import com.google.gerrit.server.logging.TraceContext.TraceIdConsumer;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.Map;
 import java.util.SortedMap;
 import java.util.SortedSet;
 import org.junit.After;
 import org.junit.Test;
 
-public class TraceContextTest {
+public class TraceContextTest extends GerritBaseTests {
   @After
   public void cleanup() {
     LoggingContext.getInstance().clearTags();
diff --git a/javatests/com/google/gerrit/server/mail/send/CommentFormatterTest.java b/javatests/com/google/gerrit/server/mail/send/CommentFormatterTest.java
index f4fbc78..78116ed 100644
--- a/javatests/com/google/gerrit/server/mail/send/CommentFormatterTest.java
+++ b/javatests/com/google/gerrit/server/mail/send/CommentFormatterTest.java
@@ -20,10 +20,11 @@
 import static com.google.gerrit.server.mail.send.CommentFormatter.BlockType.PRE_FORMATTED;
 import static com.google.gerrit.server.mail.send.CommentFormatter.BlockType.QUOTE;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.List;
 import org.junit.Test;
 
-public class CommentFormatterTest {
+public class CommentFormatterTest extends GerritBaseTests {
   private void assertBlock(
       List<CommentFormatter.Block> list, int index, CommentFormatter.BlockType type, String text) {
     CommentFormatter.Block block = list.get(index);
diff --git a/javatests/com/google/gerrit/server/mail/send/CommentSenderTest.java b/javatests/com/google/gerrit/server/mail/send/CommentSenderTest.java
index 6b6632c..87e98fd 100644
--- a/javatests/com/google/gerrit/server/mail/send/CommentSenderTest.java
+++ b/javatests/com/google/gerrit/server/mail/send/CommentSenderTest.java
@@ -16,11 +16,12 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gwtorm.server.OrmException;
 import java.util.Collections;
 import org.junit.Test;
 
-public class CommentSenderTest {
+public class CommentSenderTest extends GerritBaseTests {
   private static class TestSender extends CommentSender {
     TestSender() throws OrmException {
       super(null, null, null, null, null);
diff --git a/javatests/com/google/gerrit/server/mail/send/FromAddressGeneratorProviderTest.java b/javatests/com/google/gerrit/server/mail/send/FromAddressGeneratorProviderTest.java
index 75923b4..537ebff 100644
--- a/javatests/com/google/gerrit/server/mail/send/FromAddressGeneratorProviderTest.java
+++ b/javatests/com/google/gerrit/server/mail/send/FromAddressGeneratorProviderTest.java
@@ -28,6 +28,7 @@
 import com.google.gerrit.server.config.AllUsersName;
 import com.google.gerrit.server.config.AllUsersNameProvider;
 import com.google.gerrit.server.util.time.TimeUtil;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Optional;
@@ -36,7 +37,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class FromAddressGeneratorProviderTest {
+public class FromAddressGeneratorProviderTest extends GerritBaseTests {
   private Config config;
   private PersonIdent ident;
   private AccountCache accountCache;
diff --git a/javatests/com/google/gerrit/server/mail/send/NotificationEmailTest.java b/javatests/com/google/gerrit/server/mail/send/NotificationEmailTest.java
index 885f7cd..5d6fce7 100644
--- a/javatests/com/google/gerrit/server/mail/send/NotificationEmailTest.java
+++ b/javatests/com/google/gerrit/server/mail/send/NotificationEmailTest.java
@@ -16,9 +16,10 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class NotificationEmailTest {
+public class NotificationEmailTest extends GerritBaseTests {
 
   @Test
   public void getInstanceAndProjectName_returnsTheRightValue() {
diff --git a/javatests/com/google/gerrit/server/notedb/ChangeNotesStateTest.java b/javatests/com/google/gerrit/server/notedb/ChangeNotesStateTest.java
index 7b41ba3..5d31300 100644
--- a/javatests/com/google/gerrit/server/notedb/ChangeNotesStateTest.java
+++ b/javatests/com/google/gerrit/server/notedb/ChangeNotesStateTest.java
@@ -50,6 +50,7 @@
 import com.google.gerrit.server.cache.serialize.ProtoCacheSerializers.ObjectIdConverter;
 import com.google.gerrit.server.notedb.ChangeNotesState.ChangeColumns;
 import com.google.gerrit.server.notedb.ChangeNotesState.Serializer;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gwtorm.client.KeyUtil;
 import com.google.gwtorm.server.StandardKeyEncoder;
 import com.google.inject.TypeLiteral;
@@ -62,7 +63,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class ChangeNotesStateTest {
+public class ChangeNotesStateTest extends GerritBaseTests {
   static {
     KeyUtil.setEncoderImpl(new StandardKeyEncoder());
   }
diff --git a/javatests/com/google/gerrit/server/notedb/CommentTimestampAdapterTest.java b/javatests/com/google/gerrit/server/notedb/CommentTimestampAdapterTest.java
index e7d8956..4dd2005 100644
--- a/javatests/com/google/gerrit/server/notedb/CommentTimestampAdapterTest.java
+++ b/javatests/com/google/gerrit/server/notedb/CommentTimestampAdapterTest.java
@@ -18,6 +18,7 @@
 
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.Comment;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import java.sql.Timestamp;
@@ -28,7 +29,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class CommentTimestampAdapterTest {
+public class CommentTimestampAdapterTest extends GerritBaseTests {
   /** Arbitrary time outside of a DST transition, as an ISO instant. */
   private static final String NON_DST_STR = "2017-02-07T10:20:30.123Z";
 
diff --git a/javatests/com/google/gerrit/server/notedb/RepoSequenceTest.java b/javatests/com/google/gerrit/server/notedb/RepoSequenceTest.java
index 64fd875..5f2c87a 100644
--- a/javatests/com/google/gerrit/server/notedb/RepoSequenceTest.java
+++ b/javatests/com/google/gerrit/server/notedb/RepoSequenceTest.java
@@ -26,6 +26,7 @@
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.reviewdb.client.RefNames;
 import com.google.gerrit.server.extensions.events.GitReferenceUpdated;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.InMemoryRepositoryManager;
 import com.google.gwtorm.server.OrmException;
 import java.io.IOException;
@@ -44,7 +45,7 @@
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 
-public class RepoSequenceTest {
+public class RepoSequenceTest extends GerritBaseTests {
   // Don't sleep in tests.
   private static final Retryer<RefUpdate> RETRYER =
       RepoSequence.retryerBuilder().withBlockStrategy(t -> {}).build();
diff --git a/javatests/com/google/gerrit/server/notedb/rebuild/EventSorterTest.java b/javatests/com/google/gerrit/server/notedb/rebuild/EventSorterTest.java
index c81a176..7fb9d82 100644
--- a/javatests/com/google/gerrit/server/notedb/rebuild/EventSorterTest.java
+++ b/javatests/com/google/gerrit/server/notedb/rebuild/EventSorterTest.java
@@ -25,6 +25,7 @@
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.server.notedb.ChangeUpdate;
 import com.google.gerrit.server.util.time.TimeUtil;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.TestTimeUtil;
 import java.sql.Timestamp;
 import java.util.ArrayList;
@@ -34,7 +35,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class EventSorterTest {
+public class EventSorterTest extends GerritBaseTests {
   private class TestEvent extends Event {
     protected TestEvent(Timestamp when) {
       super(
diff --git a/javatests/com/google/gerrit/server/patch/IntraLineLoaderTest.java b/javatests/com/google/gerrit/server/patch/IntraLineLoaderTest.java
index ef80d7e..0cc4b00 100644
--- a/javatests/com/google/gerrit/server/patch/IntraLineLoaderTest.java
+++ b/javatests/com/google/gerrit/server/patch/IntraLineLoaderTest.java
@@ -19,13 +19,14 @@
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.List;
 import org.eclipse.jgit.diff.Edit;
 import org.eclipse.jgit.diff.EditList;
 import org.eclipse.jgit.diff.ReplaceEdit;
 import org.junit.Test;
 
-public class IntraLineLoaderTest {
+public class IntraLineLoaderTest extends GerritBaseTests {
 
   @Test
   public void rewriteAtStartOfLineIsRecognized() throws Exception {
diff --git a/javatests/com/google/gerrit/server/patch/PatchListEntryTest.java b/javatests/com/google/gerrit/server/patch/PatchListEntryTest.java
index 81f03af..4ed5f4b 100644
--- a/javatests/com/google/gerrit/server/patch/PatchListEntryTest.java
+++ b/javatests/com/google/gerrit/server/patch/PatchListEntryTest.java
@@ -20,9 +20,10 @@
 import static org.junit.Assert.assertTrue;
 
 import com.google.gerrit.reviewdb.client.Patch;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class PatchListEntryTest {
+public class PatchListEntryTest extends GerritBaseTests {
   @Test
   public void empty1() {
     final String name = "empty-file";
diff --git a/javatests/com/google/gerrit/server/patch/PatchListTest.java b/javatests/com/google/gerrit/server/patch/PatchListTest.java
index 6fbafb6..ccdd040 100644
--- a/javatests/com/google/gerrit/server/patch/PatchListTest.java
+++ b/javatests/com/google/gerrit/server/patch/PatchListTest.java
@@ -17,6 +17,7 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.gerrit.reviewdb.client.Patch;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.InputStream;
@@ -25,7 +26,7 @@
 import java.util.Arrays;
 import org.junit.Test;
 
-public class PatchListTest {
+public class PatchListTest extends GerritBaseTests {
   @Test
   public void fileOrder() {
     String[] names = {
diff --git a/javatests/com/google/gerrit/server/permissions/DefaultPermissionsMappingTest.java b/javatests/com/google/gerrit/server/permissions/DefaultPermissionsMappingTest.java
index 305e81b..ff9ac41 100644
--- a/javatests/com/google/gerrit/server/permissions/DefaultPermissionsMappingTest.java
+++ b/javatests/com/google/gerrit/server/permissions/DefaultPermissionsMappingTest.java
@@ -18,9 +18,10 @@
 import static com.google.gerrit.server.permissions.DefaultPermissionMappings.refPermission;
 
 import com.google.gerrit.common.data.Permission;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class DefaultPermissionsMappingTest {
+public class DefaultPermissionsMappingTest extends GerritBaseTests {
   @Test
   public void stringToRefPermission() {
     assertThat(refPermission("doesnotexist")).isEmpty();
diff --git a/javatests/com/google/gerrit/server/permissions/RefControlTest.java b/javatests/com/google/gerrit/server/permissions/RefControlTest.java
index 38e9578..c467312 100644
--- a/javatests/com/google/gerrit/server/permissions/RefControlTest.java
+++ b/javatests/com/google/gerrit/server/permissions/RefControlTest.java
@@ -66,6 +66,7 @@
 import com.google.gerrit.server.schema.ReviewDbSchemaCreator;
 import com.google.gerrit.server.util.RequestContext;
 import com.google.gerrit.server.util.ThreadLocalRequestContext;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.InMemoryDatabase;
 import com.google.gerrit.testing.InMemoryModule;
 import com.google.gerrit.testing.InMemoryRepositoryManager;
@@ -89,7 +90,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class RefControlTest {
+public class RefControlTest extends GerritBaseTests {
   private void assertAdminsAreOwnersAndDevsAreNot() {
     ProjectControl uBlah = user(local, DEVS);
     ProjectControl uAdmin = user(local, DEVS, ADMIN);
diff --git a/javatests/com/google/gerrit/server/project/CommitsCollectionTest.java b/javatests/com/google/gerrit/server/project/CommitsCollectionTest.java
index 2ae9e90..79c620a 100644
--- a/javatests/com/google/gerrit/server/project/CommitsCollectionTest.java
+++ b/javatests/com/google/gerrit/server/project/CommitsCollectionTest.java
@@ -34,6 +34,7 @@
 import com.google.gerrit.server.git.meta.MetaDataUpdate;
 import com.google.gerrit.server.project.testing.Util;
 import com.google.gerrit.server.restapi.project.CommitsCollection;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.InMemoryRepositoryManager;
 import com.google.gerrit.testing.InMemoryTestEnvironment;
 import com.google.inject.Inject;
@@ -48,7 +49,7 @@
 import org.junit.Test;
 
 /** Unit tests for {@link CommitsCollection}. */
-public class CommitsCollectionTest {
+public class CommitsCollectionTest extends GerritBaseTests {
   @Rule public InMemoryTestEnvironment testEnvironment = new InMemoryTestEnvironment();
 
   @Inject private AccountManager accountManager;
diff --git a/javatests/com/google/gerrit/server/project/GroupListTest.java b/javatests/com/google/gerrit/server/project/GroupListTest.java
index 2249a16..08aca9f 100644
--- a/javatests/com/google/gerrit/server/project/GroupListTest.java
+++ b/javatests/com/google/gerrit/server/project/GroupListTest.java
@@ -29,6 +29,7 @@
 import com.google.gerrit.reviewdb.client.AccountGroup;
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.server.git.ValidationError;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.io.IOException;
 import java.util.Collection;
 import java.util.Collections;
@@ -36,7 +37,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class GroupListTest {
+public class GroupListTest extends GerritBaseTests {
   private static final Project.NameKey PROJECT = new Project.NameKey("project");
   private static final String TEXT =
       "# UUID                                  \tGroup Name\n"
diff --git a/javatests/com/google/gerrit/server/query/change/ChangeDataTest.java b/javatests/com/google/gerrit/server/query/change/ChangeDataTest.java
index c8637cd..f7252c0 100644
--- a/javatests/com/google/gerrit/server/query/change/ChangeDataTest.java
+++ b/javatests/com/google/gerrit/server/query/change/ChangeDataTest.java
@@ -21,10 +21,11 @@
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.TestChanges;
 import org.junit.Test;
 
-public class ChangeDataTest {
+public class ChangeDataTest extends GerritBaseTests {
   @Test
   public void setPatchSetsClearsCurrentPatchSet() throws Exception {
     Project.NameKey project = new Project.NameKey("project");
diff --git a/javatests/com/google/gerrit/server/query/change/ConflictKeyTest.java b/javatests/com/google/gerrit/server/query/change/ConflictKeyTest.java
index de2acf0..1683b56 100644
--- a/javatests/com/google/gerrit/server/query/change/ConflictKeyTest.java
+++ b/javatests/com/google/gerrit/server/query/change/ConflictKeyTest.java
@@ -24,10 +24,11 @@
 import com.google.common.collect.ImmutableMap;
 import com.google.gerrit.extensions.client.SubmitType;
 import com.google.gerrit.server.cache.proto.Cache.ConflictKeyProto;
+import com.google.gerrit.testing.GerritBaseTests;
 import org.eclipse.jgit.lib.ObjectId;
 import org.junit.Test;
 
-public class ConflictKeyTest {
+public class ConflictKeyTest extends GerritBaseTests {
   @Test
   public void ffOnlyPreservesInputOrder() {
     ObjectId id1 = ObjectId.fromString("badc0feebadc0feebadc0feebadc0feebadc0fee");
diff --git a/javatests/com/google/gerrit/server/query/change/RegexPathPredicateTest.java b/javatests/com/google/gerrit/server/query/change/RegexPathPredicateTest.java
index a13a8f7..9944a42 100644
--- a/javatests/com/google/gerrit/server/query/change/RegexPathPredicateTest.java
+++ b/javatests/com/google/gerrit/server/query/change/RegexPathPredicateTest.java
@@ -19,11 +19,12 @@
 
 import com.google.gerrit.reviewdb.client.Change;
 import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gwtorm.server.OrmException;
 import java.util.Arrays;
 import org.junit.Test;
 
-public class RegexPathPredicateTest {
+public class RegexPathPredicateTest extends GerritBaseTests {
   @Test
   public void prefixOnlyOptimization() throws OrmException {
     RegexPathPredicate p = predicate("^a/b/.*");
diff --git a/javatests/com/google/gerrit/server/rules/IgnoreSelfApprovalRuleTest.java b/javatests/com/google/gerrit/server/rules/IgnoreSelfApprovalRuleTest.java
index 27f4423..14124fa 100644
--- a/javatests/com/google/gerrit/server/rules/IgnoreSelfApprovalRuleTest.java
+++ b/javatests/com/google/gerrit/server/rules/IgnoreSelfApprovalRuleTest.java
@@ -24,6 +24,7 @@
 import com.google.gerrit.reviewdb.client.LabelId;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.client.PatchSetApproval;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -31,7 +32,7 @@
 import java.util.List;
 import org.junit.Test;
 
-public class IgnoreSelfApprovalRuleTest {
+public class IgnoreSelfApprovalRuleTest extends GerritBaseTests {
   private static final Change.Id CHANGE_ID = new Change.Id(100);
   private static final PatchSet.Id PS_ID = new PatchSet.Id(CHANGE_ID, 1);
   private static final LabelType VERIFIED = makeLabel("Verified");
diff --git a/javatests/com/google/gerrit/server/rules/PrologRuleEvaluatorTest.java b/javatests/com/google/gerrit/server/rules/PrologRuleEvaluatorTest.java
index 8622b32..6eb0747 100644
--- a/javatests/com/google/gerrit/server/rules/PrologRuleEvaluatorTest.java
+++ b/javatests/com/google/gerrit/server/rules/PrologRuleEvaluatorTest.java
@@ -16,9 +16,10 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class PrologRuleEvaluatorTest {
+public class PrologRuleEvaluatorTest extends GerritBaseTests {
 
   @Test
   public void validLabelNamesAreKept() {
diff --git a/javatests/com/google/gerrit/server/schema/HANATest.java b/javatests/com/google/gerrit/server/schema/HANATest.java
index ac58134..ccf747f 100644
--- a/javatests/com/google/gerrit/server/schema/HANATest.java
+++ b/javatests/com/google/gerrit/server/schema/HANATest.java
@@ -15,11 +15,12 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.eclipse.jgit.lib.Config;
 import org.junit.Before;
 import org.junit.Test;
 
-public class HANATest {
+public class HANATest extends GerritBaseTests {
 
   private HANA hana;
   private Config config;
diff --git a/javatests/com/google/gerrit/server/schema/ReviewDbSchemaCreatorTest.java b/javatests/com/google/gerrit/server/schema/ReviewDbSchemaCreatorTest.java
index bb358cc..fa0d8b3 100644
--- a/javatests/com/google/gerrit/server/schema/ReviewDbSchemaCreatorTest.java
+++ b/javatests/com/google/gerrit/server/schema/ReviewDbSchemaCreatorTest.java
@@ -25,6 +25,7 @@
 import com.google.gerrit.server.config.AllProjectsName;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.project.ProjectConfig;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.InMemoryDatabase;
 import com.google.gerrit.testing.InMemoryModule;
 import com.google.gwtorm.jdbc.JdbcSchema;
@@ -42,7 +43,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class ReviewDbSchemaCreatorTest {
+public class ReviewDbSchemaCreatorTest extends GerritBaseTests {
   @Inject private AllProjectsName allProjects;
 
   @Inject private GitRepositoryManager repoManager;
diff --git a/javatests/com/google/gerrit/server/schema/ReviewDbSchemaUpdaterTest.java b/javatests/com/google/gerrit/server/schema/ReviewDbSchemaUpdaterTest.java
index 4133558..55bd5f9 100644
--- a/javatests/com/google/gerrit/server/schema/ReviewDbSchemaUpdaterTest.java
+++ b/javatests/com/google/gerrit/server/schema/ReviewDbSchemaUpdaterTest.java
@@ -34,6 +34,7 @@
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.group.SystemGroupBackend;
 import com.google.gerrit.server.notedb.NotesMigration;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.InMemoryDatabase;
 import com.google.gerrit.testing.InMemoryH2Type;
 import com.google.gerrit.testing.InMemoryRepositoryManager;
@@ -55,7 +56,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class ReviewDbSchemaUpdaterTest {
+public class ReviewDbSchemaUpdaterTest extends GerritBaseTests {
   private LifecycleManager lifecycle;
   private InMemoryDatabase db;
 
diff --git a/javatests/com/google/gerrit/server/update/BatchUpdateTest.java b/javatests/com/google/gerrit/server/update/BatchUpdateTest.java
index 70c4383..7f8e1f4 100644
--- a/javatests/com/google/gerrit/server/update/BatchUpdateTest.java
+++ b/javatests/com/google/gerrit/server/update/BatchUpdateTest.java
@@ -21,6 +21,7 @@
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.util.time.TimeUtil;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.InMemoryTestEnvironment;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
@@ -31,7 +32,7 @@
 import org.junit.Rule;
 import org.junit.Test;
 
-public class BatchUpdateTest {
+public class BatchUpdateTest extends GerritBaseTests {
   @Rule public InMemoryTestEnvironment testEnvironment = new InMemoryTestEnvironment();
 
   @Inject private GitRepositoryManager repoManager;
diff --git a/javatests/com/google/gerrit/server/update/RepoViewTest.java b/javatests/com/google/gerrit/server/update/RepoViewTest.java
index 9f7deee..b41c66c 100644
--- a/javatests/com/google/gerrit/server/update/RepoViewTest.java
+++ b/javatests/com/google/gerrit/server/update/RepoViewTest.java
@@ -19,6 +19,7 @@
 import static org.eclipse.jgit.lib.Constants.R_HEADS;
 
 import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.testing.InMemoryRepositoryManager;
 import org.eclipse.jgit.junit.TestRepository;
 import org.eclipse.jgit.lib.Config;
@@ -30,7 +31,7 @@
 import org.junit.Before;
 import org.junit.Test;
 
-public class RepoViewTest {
+public class RepoViewTest extends GerritBaseTests {
   private static final String MASTER = "refs/heads/master";
   private static final String BRANCH = "refs/heads/branch";
 
diff --git a/javatests/com/google/gerrit/server/util/IdGeneratorTest.java b/javatests/com/google/gerrit/server/util/IdGeneratorTest.java
index 808eca8..e702656 100644
--- a/javatests/com/google/gerrit/server/util/IdGeneratorTest.java
+++ b/javatests/com/google/gerrit/server/util/IdGeneratorTest.java
@@ -17,10 +17,11 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.HashSet;
 import org.junit.Test;
 
-public class IdGeneratorTest {
+public class IdGeneratorTest extends GerritBaseTests {
   @Test
   public void test1234() {
     final HashSet<Integer> seen = new HashSet<>();
diff --git a/javatests/com/google/gerrit/server/util/LabelVoteTest.java b/javatests/com/google/gerrit/server/util/LabelVoteTest.java
index 9069928..3048b75 100644
--- a/javatests/com/google/gerrit/server/util/LabelVoteTest.java
+++ b/javatests/com/google/gerrit/server/util/LabelVoteTest.java
@@ -19,9 +19,10 @@
 import static com.google.gerrit.server.util.LabelVote.parse;
 import static com.google.gerrit.server.util.LabelVote.parseWithEquals;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class LabelVoteTest {
+public class LabelVoteTest extends GerritBaseTests {
   @Test
   public void labelVoteParse() {
     assertLabelVoteEquals(parse("Code-Review-2"), "Code-Review", -2);
diff --git a/javatests/com/google/gerrit/server/util/MostSpecificComparatorTest.java b/javatests/com/google/gerrit/server/util/MostSpecificComparatorTest.java
index 025bf84..9ea17f3 100644
--- a/javatests/com/google/gerrit/server/util/MostSpecificComparatorTest.java
+++ b/javatests/com/google/gerrit/server/util/MostSpecificComparatorTest.java
@@ -16,9 +16,10 @@
 
 import static org.junit.Assert.assertTrue;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import org.junit.Test;
 
-public class MostSpecificComparatorTest {
+public class MostSpecificComparatorTest extends GerritBaseTests {
 
   private MostSpecificComparator cmp;
 
diff --git a/javatests/com/google/gerrit/server/util/git/BUILD b/javatests/com/google/gerrit/server/util/git/BUILD
index 61a776fa..096afa6 100644
--- a/javatests/com/google/gerrit/server/util/git/BUILD
+++ b/javatests/com/google/gerrit/server/util/git/BUILD
@@ -10,6 +10,7 @@
     deps = [
         "//java/com/google/gerrit/reviewdb:server",
         "//java/com/google/gerrit/server/util/git",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//java/com/google/gerrit/truth",
         "//java/org/eclipse/jgit:server",
         "//lib:gson",
diff --git a/javatests/com/google/gerrit/server/util/git/SubmoduleSectionParserTest.java b/javatests/com/google/gerrit/server/util/git/SubmoduleSectionParserTest.java
index 0ec9b38..c5e683f 100644
--- a/javatests/com/google/gerrit/server/util/git/SubmoduleSectionParserTest.java
+++ b/javatests/com/google/gerrit/server/util/git/SubmoduleSectionParserTest.java
@@ -20,11 +20,12 @@
 import com.google.gerrit.reviewdb.client.Branch;
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.reviewdb.client.SubmoduleSubscription;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.Set;
 import org.eclipse.jgit.lib.Config;
 import org.junit.Test;
 
-public class SubmoduleSectionParserTest {
+public class SubmoduleSectionParserTest extends GerritBaseTests {
   private static final String THIS_SERVER = "http://localhost/";
 
   @Test
diff --git a/javatests/com/google/gerrit/sshd/BUILD b/javatests/com/google/gerrit/sshd/BUILD
index ad7d8a9..7a5e18e 100644
--- a/javatests/com/google/gerrit/sshd/BUILD
+++ b/javatests/com/google/gerrit/sshd/BUILD
@@ -7,6 +7,7 @@
         "//java/com/google/gerrit/extensions:api",
         "//java/com/google/gerrit/server",
         "//java/com/google/gerrit/sshd",
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//lib/mina:sshd",
         "//lib/truth",
     ],
diff --git a/javatests/com/google/gerrit/sshd/commands/ProjectConfigParamParserTest.java b/javatests/com/google/gerrit/sshd/commands/ProjectConfigParamParserTest.java
index 777cb4f..b663849 100644
--- a/javatests/com/google/gerrit/sshd/commands/ProjectConfigParamParserTest.java
+++ b/javatests/com/google/gerrit/sshd/commands/ProjectConfigParamParserTest.java
@@ -17,12 +17,13 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.gerrit.extensions.api.projects.ConfigValue;
+import com.google.gerrit.testing.GerritBaseTests;
 import java.util.Collections;
 import java.util.Map;
 import org.junit.Before;
 import org.junit.Test;
 
-public class ProjectConfigParamParserTest {
+public class ProjectConfigParamParserTest extends GerritBaseTests {
 
   private CreateProjectCommand cmd;
 
diff --git a/javatests/com/google/gerrit/util/http/BUILD b/javatests/com/google/gerrit/util/http/BUILD
index 48b4339..2999fc0 100644
--- a/javatests/com/google/gerrit/util/http/BUILD
+++ b/javatests/com/google/gerrit/util/http/BUILD
@@ -4,6 +4,7 @@
     name = "http_tests",
     srcs = glob(["**/*.java"]),
     deps = [
+        "//java/com/google/gerrit/testing:gerrit-test-util",
         "//java/com/google/gerrit/util/http",
         "//javatests/com/google/gerrit/util/http/testutil",
         "//lib:junit",
diff --git a/javatests/com/google/gerrit/util/http/RequestUtilTest.java b/javatests/com/google/gerrit/util/http/RequestUtilTest.java
index 48b7b9c..0bf34e7 100644
--- a/javatests/com/google/gerrit/util/http/RequestUtilTest.java
+++ b/javatests/com/google/gerrit/util/http/RequestUtilTest.java
@@ -16,10 +16,11 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import com.google.gerrit.testing.GerritBaseTests;
 import com.google.gerrit.util.http.testutil.FakeHttpServletRequest;
 import org.junit.Test;
 
-public class RequestUtilTest {
+public class RequestUtilTest extends GerritBaseTests {
   @Test
   public void emptyContextPath() {
     assertThat(RequestUtil.getEncodedPathInfo(fakeRequest("", "/s", "/foo/bar")))