diff --git a/WORKSPACE b/WORKSPACE
index e0dae11..d6c5fec 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,27 +3,27 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "631205bc4f7903d3cf656a844cab2bfd6b03f246",
+    commit = "1ddb1d6c71b77972a89aa0a717f6250ef256d166",
     #local_path = "/home/<user>/projects/bazlets",
 )
 
 # Snapshot Plugin API
-#load(
-#    "@com_googlesource_gerrit_bazlets//:gerrit_api_maven_local.bzl",
-#    "gerrit_api_maven_local",
-#)
-
-# Load snapshot Plugin API
-#gerrit_api_maven_local()
-
-# Release Plugin API
 load(
-    "@com_googlesource_gerrit_bazlets//:gerrit_api.bzl",
-    "gerrit_api",
+    "@com_googlesource_gerrit_bazlets//:gerrit_api_maven_local.bzl",
+    "gerrit_api_maven_local",
 )
 
+# Load snapshot Plugin API
+gerrit_api_maven_local()
+
+# Release Plugin API
+#load(
+#    "@com_googlesource_gerrit_bazlets//:gerrit_api.bzl",
+#    "gerrit_api",
+#)
+
 # Load release Plugin API
-gerrit_api()
+#gerrit_api()
 
 load("//:external_plugin_deps.bzl", "external_plugin_deps")
 
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AccountReindexRunnable.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AccountReindexRunnable.java
index eb65106..3388bb3 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AccountReindexRunnable.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/autoreindex/AccountReindexRunnable.java
@@ -54,11 +54,10 @@
   protected Optional<Timestamp> indexIfNeeded(AccountState as, Timestamp sinceTs) {
     try {
       Account a = as.getAccount();
-      Timestamp accountTs = a.getRegisteredOn();
+      Timestamp accountTs = a.registeredOn();
       if (accountTs.after(sinceTs)) {
-        log.atInfo().log(
-            "Index %s/%s/%s/%s", a.getId(), a.getFullName(), a.getPreferredEmail(), accountTs);
-        accountIdx.index(a.getId(), Operation.INDEX, Optional.empty());
+        log.atInfo().log("Index %s/%s/%s/%s", a.id(), a.fullName(), a.preferredEmail(), accountTs);
+        accountIdx.index(a.id(), Operation.INDEX, Optional.empty());
         return Optional.of(accountTs);
       }
     } catch (IOException e) {
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandler.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandler.java
index fe5f591..58f31d9 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandler.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandler.java
@@ -146,7 +146,7 @@
   }
 
   private static Change.Id parseChangeId(String id) {
-    return new Change.Id(Integer.parseInt(Splitter.on("~").splitToList(id).get(1)));
+    return Change.id(Integer.parseInt(Splitter.on("~").splitToList(id).get(1)));
   }
 
   private static boolean isCausedByNoSuchChangeException(Throwable throwable) {
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedProjectListUpdateHandler.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedProjectListUpdateHandler.java
index 84f4675..73cd28d 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedProjectListUpdateHandler.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedProjectListUpdateHandler.java
@@ -45,7 +45,7 @@
    * @throws IOException
    */
   public void update(String projectName, boolean remove) throws IOException {
-    Project.NameKey projectKey = new Project.NameKey(projectName);
+    Project.NameKey projectKey = Project.nameKey(projectName);
     try {
       Context.setForwardedEvent(true);
       if (remove) {
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/AbstractIndexRestApiServlet.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/AbstractIndexRestApiServlet.java
index 5603fc2..4456064 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/AbstractIndexRestApiServlet.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/AbstractIndexRestApiServlet.java
@@ -22,8 +22,8 @@
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexingHandler.Operation;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.IndexEvent;
 import com.google.common.base.Charsets;
+import com.google.gerrit.server.events.EventGson;
 import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.util.Optional;
@@ -32,11 +32,11 @@
 
 public abstract class AbstractIndexRestApiServlet<T> extends AbstractRestApiServlet {
   private static final long serialVersionUID = -1L;
-  private static final Gson gson = new GsonBuilder().create();
 
   private final ForwardedIndexingHandler<T> forwardedIndexingHandler;
   private final IndexName indexName;
   private final boolean allowDelete;
+  private final Gson gson;
 
   public enum IndexName {
     CHANGE,
@@ -55,15 +55,17 @@
   AbstractIndexRestApiServlet(
       ForwardedIndexingHandler<T> forwardedIndexingHandler,
       IndexName indexName,
-      boolean allowDelete) {
+      boolean allowDelete,
+      @EventGson Gson gson) {
     this.forwardedIndexingHandler = forwardedIndexingHandler;
     this.indexName = indexName;
     this.allowDelete = allowDelete;
+    this.gson = gson;
   }
 
   AbstractIndexRestApiServlet(
       ForwardedIndexingHandler<T> forwardedIndexingHandler, IndexName indexName) {
-    this(forwardedIndexingHandler, indexName, false);
+    this(forwardedIndexingHandler, indexName, false, new Gson());
   }
 
   @Override
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServlet.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServlet.java
index 3d2d25e..37f0f20 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServlet.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServlet.java
@@ -23,7 +23,9 @@
 import com.google.common.io.CharStreams;
 import com.google.common.net.MediaType;
 import com.google.gerrit.server.events.Event;
+import com.google.gerrit.server.events.EventGson;
 import com.google.gerrit.server.permissions.PermissionBackendException;
+import com.google.gson.Gson;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import java.io.IOException;
@@ -35,10 +37,10 @@
   private static final long serialVersionUID = -1L;
 
   private final ForwardedEventHandler forwardedEventHandler;
-  private final GsonProvider gson;
+  private final Gson gson;
 
   @Inject
-  EventRestApiServlet(ForwardedEventHandler forwardedEventHandler, GsonProvider gson) {
+  EventRestApiServlet(ForwardedEventHandler forwardedEventHandler, @EventGson Gson gson) {
     this.forwardedEventHandler = forwardedEventHandler;
     this.gson = gson;
   }
@@ -61,6 +63,6 @@
 
   private Event getEventFromRequest(HttpServletRequest req) throws IOException {
     String jsonEvent = CharStreams.toString(req.getReader());
-    return gson.get().fromJson(jsonEvent, Event.class);
+    return gson.fromJson(jsonEvent, Event.class);
   }
 }
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonParser.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonParser.java
index 8db2488..90d9184 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonParser.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonParser.java
@@ -18,7 +18,10 @@
 import com.google.common.base.Strings;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.AccountGroup;
+import com.google.gerrit.server.events.EventGson;
 import com.google.gson.Gson;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 
@@ -27,32 +30,40 @@
   private final Gson gson;
 
   @Inject
-  GsonParser(GsonProvider gson) {
-    this.gson = gson.get();
+  public GsonParser(@EventGson Gson gson) {
+    this.gson = gson;
   }
 
-  public Object fromJson(String cacheName, String json) {
+  public Object fromJson(String cacheName, String jsonString) {
+    JsonElement json = gson.fromJson(Strings.nullToEmpty(jsonString), JsonElement.class);
     Object key;
     // Need to add a case for 'adv_bases'
+    if (!json.isJsonObject()) {
+      return json.getAsString();
+    }
+    JsonObject asJsonObject = json.getAsJsonObject();
     switch (cacheName) {
       case Constants.ACCOUNTS:
-        key = gson.fromJson(Strings.nullToEmpty(json).trim(), Account.Id.class);
+        key = asJsonObject.has("id") ? Account.id(asJsonObject.get("id").getAsInt()) : null;
         break;
       case Constants.GROUPS:
-        key = gson.fromJson(Strings.nullToEmpty(json).trim(), AccountGroup.Id.class);
+        key = asJsonObject.has("id") ? AccountGroup.id(asJsonObject.get("id").getAsInt()) : null;
         break;
       case Constants.GROUPS_BYINCLUDE:
       case Constants.GROUPS_MEMBERS:
-        key = gson.fromJson(Strings.nullToEmpty(json).trim(), AccountGroup.UUID.class);
+        key =
+            asJsonObject.has("uuid")
+                ? AccountGroup.uuid(asJsonObject.get("uuid").getAsString())
+                : null;
         break;
       case Constants.PROJECT_LIST:
-        key = gson.fromJson(Strings.nullToEmpty(json), Object.class);
+        key = gson.fromJson(json, Object.class);
         break;
       default:
         try {
-          key = gson.fromJson(Strings.nullToEmpty(json).trim(), String.class);
+          key = gson.fromJson(json, String.class);
         } catch (Exception e) {
-          key = gson.fromJson(Strings.nullToEmpty(json), Object.class);
+          key = gson.fromJson(json, Object.class);
         }
     }
     return key;
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonProvider.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonProvider.java
deleted file mode 100644
index e62cec2..0000000
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonProvider.java
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright (C) 2019 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package com.ericsson.gerrit.plugins.highavailability.forwarder.rest;
-
-import com.google.common.base.Supplier;
-import com.google.gerrit.server.events.Event;
-import com.google.gerrit.server.events.EventDeserializer;
-import com.google.gerrit.server.events.SupplierDeserializer;
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
-import com.google.inject.Provider;
-
-public class GsonProvider implements Provider<Gson> {
-
-  @Override
-  public Gson get() {
-    return new GsonBuilder()
-        .registerTypeAdapter(Event.class, new EventDeserializer())
-        .registerTypeAdapter(Supplier.class, new SupplierDeserializer())
-        .create();
-  }
-}
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSession.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSession.java
index f2ac080..6d801f6 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSession.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSession.java
@@ -15,11 +15,9 @@
 package com.ericsson.gerrit.plugins.highavailability.forwarder.rest;
 
 import com.ericsson.gerrit.plugins.highavailability.forwarder.rest.HttpResponseHandler.HttpResult;
-import com.google.common.base.Supplier;
 import com.google.common.net.MediaType;
-import com.google.gerrit.server.events.SupplierSerializer;
+import com.google.gerrit.server.events.EventGson;
 import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
 import com.google.inject.Inject;
 import java.io.IOException;
 import java.net.URI;
@@ -32,12 +30,12 @@
 
 class HttpSession {
   private final CloseableHttpClient httpClient;
-  private final Gson gson =
-      new GsonBuilder().registerTypeAdapter(Supplier.class, new SupplierSerializer()).create();
+  private final Gson gson;
 
   @Inject
-  HttpSession(CloseableHttpClient httpClient) {
+  HttpSession(CloseableHttpClient httpClient, @EventGson Gson gson) {
     this.httpClient = httpClient;
+    this.gson = gson;
   }
 
   HttpResult post(String uri) throws IOException {
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServlet.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServlet.java
index e7f1447..4f71eaf 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServlet.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServlet.java
@@ -30,6 +30,6 @@
 
   @Override
   Account.Id parse(String id) {
-    return new Account.Id(Integer.parseInt(id));
+    return Account.id(Integer.parseInt(id));
   }
 }
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServlet.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServlet.java
index 046611e..71e10fb 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServlet.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServlet.java
@@ -16,6 +16,8 @@
 
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexChangeHandler;
 import com.google.gerrit.extensions.restapi.Url;
+import com.google.gerrit.server.events.EventGson;
+import com.google.gson.Gson;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 
@@ -24,8 +26,8 @@
   private static final long serialVersionUID = -1L;
 
   @Inject
-  IndexChangeRestApiServlet(ForwardedIndexChangeHandler handler) {
-    super(handler, IndexName.CHANGE, true);
+  IndexChangeRestApiServlet(ForwardedIndexChangeHandler handler, @EventGson Gson gson) {
+    super(handler, IndexName.CHANGE, true, gson);
   }
 
   @Override
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServlet.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServlet.java
index a8bbb5e..85f6a32 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServlet.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServlet.java
@@ -30,6 +30,6 @@
 
   @Override
   AccountGroup.UUID parse(String id) {
-    return new AccountGroup.UUID(id);
+    return AccountGroup.uuid(id);
   }
 }
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexProjectRestApiServlet.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexProjectRestApiServlet.java
index cc87442..9ea6d63 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexProjectRestApiServlet.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexProjectRestApiServlet.java
@@ -31,6 +31,6 @@
 
   @Override
   Project.NameKey parse(String projectName) {
-    return new Project.NameKey(Url.decode(projectName));
+    return Project.nameKey(Url.decode(projectName));
   }
 }
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java
index fb3aba9..3ab9878 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarder.java
@@ -25,6 +25,8 @@
 import com.google.gerrit.extensions.annotations.PluginName;
 import com.google.gerrit.extensions.restapi.Url;
 import com.google.gerrit.server.events.Event;
+import com.google.gerrit.server.events.EventGson;
+import com.google.gson.Gson;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
 import java.io.IOException;
@@ -48,7 +50,7 @@
   private final String pluginRelativePath;
   private final Configuration cfg;
   private final Provider<Set<PeerInfo>> peerInfoProvider;
-  private final GsonProvider gson;
+  private final Gson gson;
 
   @Inject
   RestForwarder(
@@ -56,7 +58,7 @@
       @PluginName String pluginName,
       Configuration cfg,
       Provider<Set<PeerInfo>> peerInfoProvider,
-      GsonProvider gson) {
+      @EventGson Gson gson) {
     this.httpSession = httpClient;
     this.pluginRelativePath = Joiner.on("/").join("plugins", pluginName);
     this.cfg = cfg;
@@ -112,7 +114,7 @@
 
   @Override
   public boolean evict(final String cacheName, final Object key) {
-    String json = gson.get().toJson(key);
+    String json = gson.toJson(key);
     return execute(RequestMethod.POST, "invalidate cache " + cacheName, "cache", cacheName, json);
   }
 
diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/index/ChangeCheckerImpl.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/index/ChangeCheckerImpl.java
index f88e10b..ead3f0d 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/index/ChangeCheckerImpl.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/index/ChangeCheckerImpl.java
@@ -123,7 +123,7 @@
 
   private String getBranchTargetSha() {
     try (Repository repo = gitRepoMgr.openRepository(changeNotes.get().getProjectName())) {
-      String refName = changeNotes.get().getChange().getDest().get();
+      String refName = changeNotes.get().getChange().getDest().branch();
       Ref ref = repo.exactRef(refName);
       if (ref == null) {
         log.atWarning().log("Unable to find target ref %s for change %s", refName, changeId);
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedCacheEvictionHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedCacheEvictionHandlerTest.java
index 3426b05..dfcdf90 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedCacheEvictionHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedCacheEvictionHandlerTest.java
@@ -57,7 +57,7 @@
 
   @Test
   public void testSuccessfulCacheEviction() throws Exception {
-    CacheEntry entry = new CacheEntry(Constants.GERRIT, Constants.ACCOUNTS, new Account.Id(123));
+    CacheEntry entry = new CacheEntry(Constants.GERRIT, Constants.ACCOUNTS, Account.id(123));
     doReturn(cacheMock).when(cacheMapMock).get(entry.getPluginName(), entry.getCacheName());
 
     handler.evict(entry);
@@ -75,7 +75,7 @@
 
   @Test
   public void shouldSetAndUnsetForwardedContext() throws Exception {
-    CacheEntry entry = new CacheEntry(Constants.GERRIT, Constants.ACCOUNTS, new Account.Id(456));
+    CacheEntry entry = new CacheEntry(Constants.GERRIT, Constants.ACCOUNTS, Account.id(456));
     doReturn(cacheMock).when(cacheMapMock).get(entry.getPluginName(), entry.getCacheName());
 
     // this doAnswer is to allow to assert that context is set to forwarded
@@ -98,7 +98,7 @@
 
   @Test
   public void shouldSetAndUnsetForwardedContextEvenIfExceptionIsThrown() throws Exception {
-    CacheEntry entry = new CacheEntry(Constants.GERRIT, Constants.ACCOUNTS, new Account.Id(789));
+    CacheEntry entry = new CacheEntry(Constants.GERRIT, Constants.ACCOUNTS, Account.id(789));
     doReturn(cacheMock).when(cacheMapMock).get(entry.getPluginName(), entry.getCacheName());
 
     doAnswer(
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedEventHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedEventHandlerTest.java
index c45b376..c83b803 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedEventHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedEventHandlerTest.java
@@ -15,7 +15,7 @@
 package com.ericsson.gerrit.plugins.highavailability.forwarder;
 
 import static com.google.common.truth.Truth.assertThat;
-import static org.junit.Assert.fail;
+import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.verify;
 
@@ -85,12 +85,9 @@
         .postEvent(event);
 
     assertThat(Context.isForwardedEvent()).isFalse();
-    try {
-      handler.dispatch(event);
-      fail("should have throw a PermissionBackendException");
-    } catch (PermissionBackendException e) {
-      assertThat(e.getMessage()).isEqualTo("someMessage");
-    }
+    PermissionBackendException thrown =
+        assertThrows(PermissionBackendException.class, () -> handler.dispatch(event));
+    assertThat(thrown).hasMessageThat().isEqualTo("someMessage");
     assertThat(Context.isForwardedEvent()).isFalse();
 
     verify(dispatcherMock).postEvent(event);
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandlerTest.java
index c2d3659..29dd3e7 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexAccountHandlerTest.java
@@ -15,7 +15,7 @@
 package com.ericsson.gerrit.plugins.highavailability.forwarder;
 
 import static com.google.common.truth.Truth.assertThat;
-import static org.junit.Assert.fail;
+import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -50,7 +50,7 @@
     when(configMock.index()).thenReturn(indexMock);
     when(indexMock.numStripedLocks()).thenReturn(10);
     handler = new ForwardedIndexAccountHandler(indexerMock, configMock);
-    id = new Account.Id(123);
+    id = Account.id(123);
   }
 
   @Test
@@ -98,12 +98,9 @@
         .index(id);
 
     assertThat(Context.isForwardedEvent()).isFalse();
-    try {
-      handler.index(id, Operation.INDEX, Optional.empty());
-      fail("should have thrown an IOException");
-    } catch (IOException e) {
-      assertThat(e.getMessage()).isEqualTo("someMessage");
-    }
+    IOException thrown =
+        assertThrows(IOException.class, () -> handler.index(id, Operation.INDEX, Optional.empty()));
+    assertThat(thrown).hasMessageThat().isEqualTo("someMessage");
     assertThat(Context.isForwardedEvent()).isFalse();
 
     verify(indexerMock).index(id);
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandlerTest.java
index df1bdac..7bb8f06 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexChangeHandlerTest.java
@@ -15,7 +15,7 @@
 package com.ericsson.gerrit.plugins.highavailability.forwarder;
 
 import static com.google.common.truth.Truth.assertThat;
-import static org.junit.Assert.fail;
+import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.times;
@@ -69,7 +69,7 @@
 
   @Before
   public void setUp() throws Exception {
-    id = new Change.Id(TEST_CHANGE_NUMBER);
+    id = Change.id(TEST_CHANGE_NUMBER);
     Change change = new Change(null, id, null, null, TimeUtil.nowTs());
     when(changeNotes.getChange()).thenReturn(change);
     when(configMock.index()).thenReturn(indexMock);
@@ -141,12 +141,11 @@
         .index(any(Change.class));
 
     assertThat(Context.isForwardedEvent()).isFalse();
-    try {
-      handler.index(TEST_CHANGE_ID, Operation.INDEX, Optional.empty());
-      fail("should have thrown an IOException");
-    } catch (IOException e) {
-      assertThat(e.getMessage()).isEqualTo("someMessage");
-    }
+    IOException thrown =
+        assertThrows(
+            IOException.class,
+            () -> handler.index(TEST_CHANGE_ID, Operation.INDEX, Optional.empty()));
+    assertThat(thrown).hasMessageThat().isEqualTo("someMessage");
     assertThat(Context.isForwardedEvent()).isFalse();
 
     verify(indexerMock, times(1)).index(any(Change.class));
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandlerTest.java
index ab55b73..d82ffdf 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexGroupHandlerTest.java
@@ -15,7 +15,7 @@
 package com.ericsson.gerrit.plugins.highavailability.forwarder;
 
 import static com.google.common.truth.Truth.assertThat;
-import static org.junit.Assert.fail;
+import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -50,7 +50,7 @@
     when(configMock.index()).thenReturn(indexMock);
     when(indexMock.numStripedLocks()).thenReturn(10);
     handler = new ForwardedIndexGroupHandler(indexerMock, configMock);
-    uuid = new AccountGroup.UUID("123");
+    uuid = AccountGroup.uuid("123");
   }
 
   @Test
@@ -98,12 +98,10 @@
         .index(uuid);
 
     assertThat(Context.isForwardedEvent()).isFalse();
-    try {
-      handler.index(uuid, Operation.INDEX, Optional.empty());
-      fail("should have thrown an IOException");
-    } catch (IOException e) {
-      assertThat(e.getMessage()).isEqualTo("someMessage");
-    }
+    IOException thrown =
+        assertThrows(
+            IOException.class, () -> handler.index(uuid, Operation.INDEX, Optional.empty()));
+    assertThat(thrown).hasMessageThat().isEqualTo("someMessage");
     assertThat(Context.isForwardedEvent()).isFalse();
 
     verify(indexerMock).index(uuid);
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexProjectHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexProjectHandlerTest.java
index ea64d71..09ec5ad 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexProjectHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedIndexProjectHandlerTest.java
@@ -15,7 +15,7 @@
 package com.ericsson.gerrit.plugins.highavailability.forwarder;
 
 import static com.google.common.truth.Truth.assertThat;
-import static org.junit.Assert.fail;
+import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -50,7 +50,7 @@
     when(configMock.index()).thenReturn(indexMock);
     when(indexMock.numStripedLocks()).thenReturn(10);
     handler = new ForwardedIndexProjectHandler(indexerMock, configMock);
-    nameKey = new Project.NameKey("project/name");
+    nameKey = Project.nameKey("project/name");
   }
 
   @Test
@@ -98,12 +98,10 @@
         .index(nameKey);
 
     assertThat(Context.isForwardedEvent()).isFalse();
-    try {
-      handler.index(nameKey, Operation.INDEX, Optional.empty());
-      fail("should have thrown an IOException");
-    } catch (IOException e) {
-      assertThat(e.getMessage()).isEqualTo("someMessage");
-    }
+    IOException thrown =
+        assertThrows(
+            IOException.class, () -> handler.index(nameKey, Operation.INDEX, Optional.empty()));
+    assertThat(thrown).hasMessageThat().isEqualTo("someMessage");
     assertThat(Context.isForwardedEvent()).isFalse();
 
     verify(indexerMock).index(nameKey);
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedProjectListUpdateHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedProjectListUpdateHandlerTest.java
index 3ee8581..926e849 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedProjectListUpdateHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/ForwardedProjectListUpdateHandlerTest.java
@@ -15,7 +15,7 @@
 package com.ericsson.gerrit.plugins.highavailability.forwarder;
 
 import static com.google.common.truth.Truth.assertThat;
-import static org.junit.Assert.fail;
+import static com.google.gerrit.testing.GerritJUnit.assertThrows;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.verify;
 
@@ -35,7 +35,7 @@
 
   private static final String PROJECT_NAME = "someProject";
   private static final String SOME_MESSAGE = "someMessage";
-  private static final Project.NameKey PROJECT_KEY = new Project.NameKey(PROJECT_NAME);
+  private static final Project.NameKey PROJECT_KEY = Project.nameKey(PROJECT_NAME);
   @Rule public ExpectedException exception = ExpectedException.none();
   @Mock private ProjectCache projectCacheMock;
   private ForwardedProjectListUpdateHandler handler;
@@ -109,12 +109,9 @@
         .onCreateProject(PROJECT_KEY);
 
     assertThat(Context.isForwardedEvent()).isFalse();
-    try {
-      handler.update(PROJECT_NAME, false);
-      fail("should have thrown a RuntimeException");
-    } catch (RuntimeException e) {
-      assertThat(e.getMessage()).isEqualTo(SOME_MESSAGE);
-    }
+    RuntimeException thrown =
+        assertThrows(RuntimeException.class, () -> handler.update(PROJECT_NAME, false));
+    assertThat(thrown).hasMessageThat().isEqualTo(SOME_MESSAGE);
     assertThat(Context.isForwardedEvent()).isFalse();
 
     verify(projectCacheMock).onCreateProject(PROJECT_KEY);
@@ -132,12 +129,9 @@
         .remove(PROJECT_KEY);
 
     assertThat(Context.isForwardedEvent()).isFalse();
-    try {
-      handler.update(PROJECT_NAME, true);
-      fail("should have thrown a RuntimeException");
-    } catch (RuntimeException e) {
-      assertThat(e.getMessage()).isEqualTo(SOME_MESSAGE);
-    }
+    RuntimeException thrown =
+        assertThrows(RuntimeException.class, () -> handler.update(PROJECT_NAME, true));
+    assertThat(thrown).hasMessageThat().isEqualTo(SOME_MESSAGE);
     assertThat(Context.isForwardedEvent()).isFalse();
 
     verify(projectCacheMock).remove(PROJECT_KEY);
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/CacheRestApiServletTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/CacheRestApiServletTest.java
index 8b08d24..44dd7f0 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/CacheRestApiServletTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/CacheRestApiServletTest.java
@@ -24,6 +24,7 @@
 import com.ericsson.gerrit.plugins.highavailability.cache.Constants;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.CacheNotFoundException;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedCacheEvictionHandler;
+import com.google.gson.Gson;
 import java.io.BufferedReader;
 import java.io.IOException;
 import javax.servlet.http.HttpServletRequest;
@@ -45,8 +46,7 @@
   @Before
   public void setUp() {
     servlet =
-        new CacheRestApiServlet(
-            forwardedCacheEvictionHandlerMock, new GsonParser(new GsonProvider()));
+        new CacheRestApiServlet(forwardedCacheEvictionHandlerMock, new GsonParser(new Gson()));
   }
 
   @Test
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServletTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServletTest.java
index 7872785..884cec5 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServletTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/EventRestApiServletTest.java
@@ -26,9 +26,11 @@
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedEventHandler;
 import com.google.common.net.MediaType;
 import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.server.events.EventGsonProvider;
 import com.google.gerrit.server.events.EventTypes;
 import com.google.gerrit.server.events.RefEvent;
 import com.google.gerrit.server.permissions.PermissionBackendException;
+import com.google.gson.Gson;
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.StringReader;
@@ -49,6 +51,7 @@
   @Mock private HttpServletRequest requestMock;
   @Mock private HttpServletResponse responseMock;
   private EventRestApiServlet eventRestApiServlet;
+  private Gson gson = new EventGsonProvider().get();
 
   @BeforeClass
   public static void setup() {
@@ -57,7 +60,7 @@
 
   @Before
   public void createEventsRestApiServlet() throws Exception {
-    eventRestApiServlet = new EventRestApiServlet(forwardedEventHandlerMock, new GsonProvider());
+    eventRestApiServlet = new EventRestApiServlet(forwardedEventHandlerMock, gson);
     when(requestMock.getContentType()).thenReturn(MediaType.JSON_UTF_8.toString());
   }
 
@@ -129,7 +132,7 @@
 
     @Override
     public Project.NameKey getProjectNameKey() {
-      return new Project.NameKey(project);
+      return Project.nameKey(project);
     }
 
     @Override
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonParserTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonParserTest.java
index 2f6ce7e..88c638d 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonParserTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/GsonParserTest.java
@@ -19,31 +19,32 @@
 import com.ericsson.gerrit.plugins.highavailability.cache.Constants;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.AccountGroup;
+import com.google.gerrit.server.events.EventGsonProvider;
 import com.google.gson.Gson;
 import org.junit.Test;
 
 public class GsonParserTest {
   private static final Object EMPTY_JSON = "{}";
-  private final Gson gson = new Gson();
-  private final GsonParser objectUnderTest = new GsonParser(new GsonProvider());
+  private final Gson gson = new EventGsonProvider().get();
+  private final GsonParser objectUnderTest = new GsonParser(gson);
 
   @Test
   public void accountIDParse() {
-    Account.Id accountId = new Account.Id(1);
+    Account.Id accountId = Account.id(1);
     String json = gson.toJson(accountId);
     assertThat(accountId).isEqualTo(objectUnderTest.fromJson(Constants.ACCOUNTS, json));
   }
 
   @Test
   public void accountGroupIDParse() {
-    AccountGroup.Id accountGroupId = new AccountGroup.Id(1);
+    AccountGroup.Id accountGroupId = AccountGroup.id(1);
     String json = gson.toJson(accountGroupId);
     assertThat(accountGroupId).isEqualTo(objectUnderTest.fromJson(Constants.GROUPS, json));
   }
 
   @Test
   public void accountGroupUUIDParse() {
-    AccountGroup.UUID accountGroupUuid = new AccountGroup.UUID("abc123");
+    AccountGroup.UUID accountGroupUuid = AccountGroup.uuid("abc123");
     String json = gson.toJson(accountGroupUuid);
     assertThat(accountGroupUuid)
         .isEqualTo(objectUnderTest.fromJson(Constants.GROUPS_BYINCLUDE, json));
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSessionTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSessionTest.java
index 5e0d4c9..1edcd43 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSessionTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/HttpSessionTest.java
@@ -28,6 +28,7 @@
 import com.github.tomakehurst.wiremock.http.Fault;
 import com.github.tomakehurst.wiremock.junit.WireMockRule;
 import com.github.tomakehurst.wiremock.stubbing.Scenario;
+import com.google.gson.Gson;
 import java.net.SocketTimeoutException;
 import org.junit.Before;
 import org.junit.Rule;
@@ -70,7 +71,7 @@
     when(configMock.http().socketTimeout()).thenReturn(TIMEOUT);
     when(configMock.http().retryInterval()).thenReturn(RETRY_INTERVAL);
 
-    httpSession = new HttpSession(new HttpClientProvider(configMock).get());
+    httpSession = new HttpSession(new HttpClientProvider(configMock).get(), new Gson());
   }
 
   @Test
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServletTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServletTest.java
index 4622a17..bb617fc 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServletTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexAccountRestApiServletTest.java
@@ -51,7 +51,7 @@
   @Before
   public void setUpMocks() {
     servlet = new IndexAccountRestApiServlet(handlerMock);
-    id = new Account.Id(ACCOUNT_NUMBER);
+    id = Account.id(ACCOUNT_NUMBER);
     when(requestMock.getRequestURI())
         .thenReturn("http://gerrit.com/index/account/" + ACCOUNT_NUMBER);
   }
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServletTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServletTest.java
index fb3649e..3da35d4 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServletTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexChangeRestApiServletTest.java
@@ -25,6 +25,7 @@
 
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexChangeHandler;
 import com.ericsson.gerrit.plugins.highavailability.forwarder.ForwardedIndexingHandler.Operation;
+import com.google.gson.Gson;
 import java.io.IOException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
@@ -50,7 +51,7 @@
 
   @Before
   public void setUpMocks() {
-    servlet = new IndexChangeRestApiServlet(handlerMock);
+    servlet = new IndexChangeRestApiServlet(handlerMock, new Gson());
     when(requestMock.getRequestURI())
         .thenReturn("http://gerrit.com/index/change/" + PROJECT_NAME_URL_ENC + "~" + CHANGE_NUMBER);
   }
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServletTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServletTest.java
index 6291142..e330d8c 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServletTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexGroupRestApiServletTest.java
@@ -51,7 +51,7 @@
   @Before
   public void setUpMocks() {
     servlet = new IndexGroupRestApiServlet(handlerMock);
-    uuid = new AccountGroup.UUID(UUID);
+    uuid = AccountGroup.uuid(UUID);
     when(requestMock.getRequestURI()).thenReturn("http://gerrit.com/index/group/" + UUID);
   }
 
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexProjectRestApiServletTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexProjectRestApiServletTest.java
index 83420b9..aefb8c8 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexProjectRestApiServletTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/IndexProjectRestApiServletTest.java
@@ -52,7 +52,7 @@
   @Before
   public void setUpMocks() {
     servlet = new IndexProjectRestApiServlet(handlerMock);
-    nameKey = new Project.NameKey(PROJECT_NAME);
+    nameKey = Project.nameKey(PROJECT_NAME);
     when(requestMock.getRequestURI())
         .thenReturn("http://gerrit.com/index/project/" + Url.encode(nameKey.get()));
   }
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/ProjectListRestApiServletIT.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/ProjectListRestApiServletIT.java
index 55aa2c9..3ad5219 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/ProjectListRestApiServletIT.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/ProjectListRestApiServletIT.java
@@ -30,7 +30,7 @@
     sysModule = "com.ericsson.gerrit.plugins.highavailability.Module",
     httpModule = "com.ericsson.gerrit.plugins.highavailability.HttpModule")
 public class ProjectListRestApiServletIT extends LightweightPluginDaemonTest {
-  private static final Project.NameKey SOME_PROJECT = new Project.NameKey("org-a/some-project");
+  private static final Project.NameKey SOME_PROJECT = Project.nameKey("org-a/some-project");
 
   @Test
   @UseLocalDisk
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarderTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarderTest.java
index 55a3c2a..815e3e9 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarderTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/forwarder/rest/RestForwarderTest.java
@@ -75,9 +75,6 @@
   private static final String INDEX_GROUP_ENDPOINT =
       Joiner.on("/").join(URL, PLUGINS, PLUGIN_NAME, "index/group", UUID);
 
-  private GsonProvider gsonProvider = new GsonProvider();
-  private Gson gson = gsonProvider.get();
-
   // Event
   private static Event event = new TestEvent();
   private static final String EVENT_ENDPOINT =
@@ -85,6 +82,7 @@
 
   private RestForwarder forwarder;
   private HttpSession httpSessionMock;
+  private Gson gson = new Gson();
 
   @SuppressWarnings("unchecked")
   @Before
@@ -97,11 +95,7 @@
     when(peersMock.get()).thenReturn(ImmutableSet.of(new PeerInfo(URL)));
     forwarder =
         new RestForwarder(
-            httpSessionMock,
-            PLUGIN_NAME,
-            configMock,
-            peersMock,
-            gsonProvider); // TODO: Create provider
+            httpSessionMock, PLUGIN_NAME, configMock, peersMock, gson); // TODO: Create provider
   }
 
   @Test
@@ -214,7 +208,7 @@
 
   @Test
   public void testEvictAccountsOK() throws Exception {
-    Account.Id key = new Account.Id(123);
+    Account.Id key = Account.id(123);
     String keyJson = gson.toJson(key);
     when(httpSessionMock.post(buildCacheEndpoint(Constants.ACCOUNTS), keyJson))
         .thenReturn(new HttpResult(SUCCESSFUL, EMPTY_MSG));
@@ -223,7 +217,7 @@
 
   @Test
   public void testEvictGroupsOK() throws Exception {
-    AccountGroup.Id key = new AccountGroup.Id(123);
+    AccountGroup.Id key = AccountGroup.id(123);
     String keyJson = gson.toJson(key);
     String endpoint = buildCacheEndpoint(Constants.GROUPS);
     when(httpSessionMock.post(endpoint, keyJson)).thenReturn(new HttpResult(SUCCESSFUL, EMPTY_MSG));
@@ -232,7 +226,7 @@
 
   @Test
   public void testEvictGroupsByIncludeOK() throws Exception {
-    AccountGroup.UUID key = new AccountGroup.UUID("90b3042d9094a37985f3f9281391dbbe9a5addad");
+    AccountGroup.UUID key = AccountGroup.uuid("90b3042d9094a37985f3f9281391dbbe9a5addad");
     String keyJson = gson.toJson(key);
     when(httpSessionMock.post(buildCacheEndpoint(Constants.GROUPS_BYINCLUDE), keyJson))
         .thenReturn(new HttpResult(SUCCESSFUL, EMPTY_MSG));
@@ -241,7 +235,7 @@
 
   @Test
   public void testEvictGroupsMembersOK() throws Exception {
-    AccountGroup.UUID key = new AccountGroup.UUID("90b3042d9094a37985f3f9281391dbbe9a5addad");
+    AccountGroup.UUID key = AccountGroup.uuid("90b3042d9094a37985f3f9281391dbbe9a5addad");
     String keyJson = gson.toJson(key);
     when(httpSessionMock.post(buildCacheEndpoint(Constants.GROUPS_MEMBERS), keyJson))
         .thenReturn(new HttpResult(SUCCESSFUL, EMPTY_MSG));
diff --git a/src/test/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandlerTest.java b/src/test/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandlerTest.java
index d9e1b22..ef89178 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandlerTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/highavailability/index/IndexEventHandlerTest.java
@@ -61,9 +61,9 @@
 
   @Before
   public void setUpMocks() throws Exception {
-    changeId = new Change.Id(CHANGE_ID);
-    accountId = new Account.Id(ACCOUNT_ID);
-    accountGroupUUID = new AccountGroup.UUID(UUID);
+    changeId = Change.id(CHANGE_ID);
+    accountId = Account.id(ACCOUNT_ID);
+    accountGroupUUID = AccountGroup.uuid(UUID);
     when(changeCheckerFactoryMock.create(any())).thenReturn(changeCheckerMock);
     when(changeCheckerMock.newIndexEvent()).thenReturn(Optional.of(new IndexEvent()));
     indexEventHandler =