diff --git a/runtime/tests/org.eclipse.core.tests.harness/src/org/eclipse/core/tests/harness/FussyProgressMonitor.java b/runtime/tests/org.eclipse.core.tests.harness/src/org/eclipse/core/tests/harness/FussyProgressMonitor.java
index 0eed39172f5..d45eb001173 100644
--- a/runtime/tests/org.eclipse.core.tests.harness/src/org/eclipse/core/tests/harness/FussyProgressMonitor.java
+++ b/runtime/tests/org.eclipse.core.tests.harness/src/org/eclipse/core/tests/harness/FussyProgressMonitor.java
@@ -15,8 +15,8 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import junit.framework.AssertionFailedError;
 import org.eclipse.core.runtime.jobs.Job;
+import org.opentest4j.AssertionFailedError;
 
 /**
  * This class can be used for testing progress monitoring.
diff --git a/runtime/tests/org.eclipse.core.tests.harness/src/org/eclipse/core/tests/session/RemoteAssertionFailedError.java b/runtime/tests/org.eclipse.core.tests.harness/src/org/eclipse/core/tests/session/RemoteAssertionFailedError.java
index efa9a78dbf7..577023d6fbe 100644
--- a/runtime/tests/org.eclipse.core.tests.harness/src/org/eclipse/core/tests/session/RemoteAssertionFailedError.java
+++ b/runtime/tests/org.eclipse.core.tests.harness/src/org/eclipse/core/tests/session/RemoteAssertionFailedError.java
@@ -15,7 +15,7 @@
 
 import java.io.PrintStream;
 import java.io.PrintWriter;
-import junit.framework.AssertionFailedError;
+import org.opentest4j.AssertionFailedError;
 
 public class RemoteAssertionFailedError extends AssertionFailedError {
 	/**