diff --git a/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java b/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java
index 89e0c7fdf7eec..e8a0dfc0f0a5f 100644
--- a/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java
+++ b/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java
@@ -439,9 +439,14 @@ public void testPairFlatMap() {
    */
   public static <T extends Comparable<T>> void assertOrderInvariantEquals(
     List<List<T>> expected, List<List<T>> actual) {
-    expected.forEach((List<T> list) -> Collections.sort(list));
-    actual.forEach((List<T> list) -> Collections.sort(list));
-    Assert.assertEquals(expected, actual);
+    expected.forEach(list -> Collections.sort(list));
+    List<List<T>> sortedActual = new ArrayList<>();
+    actual.forEach(list -> {
+        List<T> sortedList = new ArrayList<>(list);
+        Collections.sort(sortedList);
+        sortedActual.add(sortedList);
+    });
+    Assert.assertEquals(expected, sortedActual);
   }
 
   @Test