diff --git a/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerConfigInfo.java b/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerConfigInfo.java
index b74d8ea..f877f64 100644
--- a/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerConfigInfo.java
+++ b/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerConfigInfo.java
@@ -14,9 +14,7 @@
 
 package com.google.gerrit.plugins.codeowners.api;
 
-import com.google.common.base.MoreObjects;
 import java.util.List;
-import java.util.Objects;
 
 /**
  * Representation of a {@link com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig} in the
@@ -39,23 +37,4 @@
    * <p>Not set if there are no code owner sets defined in this code owner config.
    */
   public List<CodeOwnerSetInfo> codeOwnerSets;
-
-  @Override
-  public int hashCode() {
-    return Objects.hashCode(codeOwnerSets);
-  }
-
-  @Override
-  public boolean equals(Object o) {
-    if (!(o instanceof CodeOwnerConfigInfo)) {
-      return false;
-    }
-    CodeOwnerConfigInfo other = (CodeOwnerConfigInfo) o;
-    return Objects.equals(codeOwnerSets, other.codeOwnerSets);
-  }
-
-  @Override
-  public String toString() {
-    return MoreObjects.toStringHelper(this).add("codeOwnerSets", codeOwnerSets).toString();
-  }
 }
diff --git a/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerInfo.java b/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerInfo.java
index 934674a..c141bea 100644
--- a/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerInfo.java
+++ b/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerInfo.java
@@ -14,9 +14,7 @@
 
 package com.google.gerrit.plugins.codeowners.api;
 
-import com.google.common.base.MoreObjects;
 import com.google.gerrit.extensions.common.AccountInfo;
-import java.util.Objects;
 
 /**
  * Representation of a code owner in the REST API.
@@ -26,23 +24,4 @@
 public class CodeOwnerInfo {
   /** The account of the code owner. */
   public AccountInfo account;
-
-  @Override
-  public int hashCode() {
-    return Objects.hashCode(account);
-  }
-
-  @Override
-  public boolean equals(Object o) {
-    if (!(o instanceof CodeOwnerInfo)) {
-      return false;
-    }
-    CodeOwnerInfo other = (CodeOwnerInfo) o;
-    return Objects.equals(account, other.account);
-  }
-
-  @Override
-  public String toString() {
-    return MoreObjects.toStringHelper(this).add("account", account).toString();
-  }
 }
diff --git a/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerReferenceInfo.java b/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerReferenceInfo.java
index 1ca0c63..6ba7f69 100644
--- a/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerReferenceInfo.java
+++ b/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerReferenceInfo.java
@@ -14,9 +14,6 @@
 
 package com.google.gerrit.plugins.codeowners.api;
 
-import com.google.common.base.MoreObjects;
-import java.util.Objects;
-
 /**
  * Representation of a {@link com.google.gerrit.plugins.codeowners.backend.CodeOwnerReference} in
  * the REST API.
@@ -26,23 +23,4 @@
 public class CodeOwnerReferenceInfo {
   /** The email of the code owner. */
   public String email;
-
-  @Override
-  public int hashCode() {
-    return Objects.hashCode(email);
-  }
-
-  @Override
-  public boolean equals(Object o) {
-    if (!(o instanceof CodeOwnerReferenceInfo)) {
-      return false;
-    }
-    CodeOwnerReferenceInfo other = (CodeOwnerReferenceInfo) o;
-    return Objects.equals(email, other.email);
-  }
-
-  @Override
-  public String toString() {
-    return MoreObjects.toStringHelper(this).add("email", email).toString();
-  }
 }
diff --git a/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerSetInfo.java b/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerSetInfo.java
index 54ccc3f..8dccbd6 100644
--- a/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerSetInfo.java
+++ b/java/com/google/gerrit/plugins/codeowners/api/CodeOwnerSetInfo.java
@@ -14,9 +14,7 @@
 
 package com.google.gerrit.plugins.codeowners.api;
 
-import com.google.common.base.MoreObjects;
 import java.util.List;
-import java.util.Objects;
 
 /**
  * Representation of a {@link com.google.gerrit.plugins.codeowners.backend.CodeOwnerSet} in the REST
@@ -31,23 +29,4 @@
    * <p>Not set if there are no code owners defined in this code owner set.
    */
   public List<CodeOwnerReferenceInfo> codeOwners;
-
-  @Override
-  public int hashCode() {
-    return Objects.hashCode(codeOwners);
-  }
-
-  @Override
-  public boolean equals(Object o) {
-    if (!(o instanceof CodeOwnerSetInfo)) {
-      return false;
-    }
-    CodeOwnerSetInfo other = (CodeOwnerSetInfo) o;
-    return Objects.equals(codeOwners, other.codeOwners);
-  }
-
-  @Override
-  public String toString() {
-    return MoreObjects.toStringHelper(this).add("codeOwners", codeOwners).toString();
-  }
 }
diff --git a/java/com/google/gerrit/plugins/codeowners/testing/CodeOwnerConfigInfoSubject.java b/java/com/google/gerrit/plugins/codeowners/testing/CodeOwnerConfigInfoSubject.java
index 116407d..c2fb3be 100644
--- a/java/com/google/gerrit/plugins/codeowners/testing/CodeOwnerConfigInfoSubject.java
+++ b/java/com/google/gerrit/plugins/codeowners/testing/CodeOwnerConfigInfoSubject.java
@@ -14,6 +14,7 @@
 
 package com.google.gerrit.plugins.codeowners.testing;
 
+import static com.google.common.collect.ImmutableList.toImmutableList;
 import static com.google.common.truth.Truth.assertAbout;
 import static com.google.gerrit.plugins.codeowners.testing.CodeOwnerSetInfoSubject.codeOwnerSetInfos;
 import static com.google.gerrit.truth.ListSubject.elements;
@@ -24,9 +25,11 @@
 import com.google.gerrit.plugins.codeowners.api.CodeOwnerConfigInfo;
 import com.google.gerrit.plugins.codeowners.api.CodeOwnerSetInfo;
 import com.google.gerrit.plugins.codeowners.backend.CodeOwnerConfig;
-import com.google.gerrit.plugins.codeowners.restapi.CodeOwnerConfigJson;
+import com.google.gerrit.plugins.codeowners.backend.CodeOwnerReference;
 import com.google.gerrit.truth.ListSubject;
+import com.google.gerrit.truth.NullAwareCorrespondence;
 import com.google.gerrit.truth.OptionalSubject;
+import java.util.List;
 import java.util.Optional;
 
 /** {@link Subject} for doing assertions on {@link CodeOwnerConfigInfo}s. */
@@ -93,9 +96,21 @@
    *     corresponds to the {@link CodeOwnerConfigInfo} of this subject
    */
   public void correspondsTo(CodeOwnerConfig codeOwnerConfig) {
-    check("codeOwnerInfo()")
-        .that(codeOwnerConfigInfo())
-        .isEqualTo(CodeOwnerConfigJson.format(codeOwnerConfig));
+    hasIgnoreParentCodeOwnersThat().isEqualTo(codeOwnerConfig.ignoreParentCodeOwners());
+    hasCodeOwnerSetsThat()
+        .comparingElementsUsing(
+            NullAwareCorrespondence.<CodeOwnerSetInfo, List<String>>transforming(
+                codeOwnerSetInfo ->
+                    codeOwnerSetInfo.codeOwners.stream()
+                        .map(codeOwnerReferenceInfo -> codeOwnerReferenceInfo.email)
+                        .collect(toImmutableList()),
+                "has code owners"))
+        .containsExactly(
+            codeOwnerConfig.codeOwnerSets().stream()
+                .flatMap(
+                    codeOwnerSet ->
+                        codeOwnerSet.codeOwners().stream().map(CodeOwnerReference::email))
+                .collect(toImmutableList()));
   }
 
   private CodeOwnerConfigInfo codeOwnerConfigInfo() {