diff --git a/xds/src/test/java/io/grpc/xds/ClusterManagerLoadBalancerProviderTest.java b/xds/src/test/java/io/grpc/xds/ClusterManagerLoadBalancerProviderTest.java
index 3621761b71..5240415518 100644
--- a/xds/src/test/java/io/grpc/xds/ClusterManagerLoadBalancerProviderTest.java
+++ b/xds/src/test/java/io/grpc/xds/ClusterManagerLoadBalancerProviderTest.java
@@ -30,8 +30,11 @@ import java.io.IOException;
 import java.util.Collections;
 import java.util.Map;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
 
 /** Tests for {@link ClusterManagerLoadBalancerProvider}. */
+@RunWith(JUnit4.class)
 public class ClusterManagerLoadBalancerProviderTest {
 
   @Test