diff --git a/interop-testing/src/test/java/io/grpc/testing/integration/AutoWindowSizingOnTest.java b/interop-testing/src/test/java/io/grpc/testing/integration/AutoWindowSizingOnTest.java
index 5befee64ff..c7fc8817fb 100644
--- a/interop-testing/src/test/java/io/grpc/testing/integration/AutoWindowSizingOnTest.java
+++ b/interop-testing/src/test/java/io/grpc/testing/integration/AutoWindowSizingOnTest.java
@@ -39,7 +39,10 @@ import io.grpc.netty.NettyServerBuilder;
 
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
 
+@RunWith(JUnit4.class)
 public class AutoWindowSizingOnTest extends AbstractInteropTest {
 
   @BeforeClass