diff --git a/javatests/google/registry/testing/AbstractEppResourceSubject.java b/javatests/google/registry/testing/AbstractEppResourceSubject.java
index b5d8d9866..79cb666d6 100644
--- a/javatests/google/registry/testing/AbstractEppResourceSubject.java
+++ b/javatests/google/registry/testing/AbstractEppResourceSubject.java
@@ -53,7 +53,7 @@ abstract class AbstractEppResourceSubject
   }
 
   @Override
-  public String actualCustomStringRepresentation() {
+  protected String actualCustomStringRepresentation() {
     return String.format(
         "%s with foreign key '%s'",
         actual().getClass().getSimpleName(),
diff --git a/javatests/google/registry/testing/HistoryEntrySubject.java b/javatests/google/registry/testing/HistoryEntrySubject.java
index 41b0a17f8..419cb23a6 100644
--- a/javatests/google/registry/testing/HistoryEntrySubject.java
+++ b/javatests/google/registry/testing/HistoryEntrySubject.java
@@ -35,7 +35,7 @@ public class HistoryEntrySubject extends Subject<HistoryEntrySubject, HistoryEnt
   }
 
   @Override
-  public String actualCustomStringRepresentation() {
+  protected String actualCustomStringRepresentation() {
     return Optional.ofNullable(customDisplaySubject).orElse(String.valueOf(actual()));
   }