diff --git a/flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/tasks/SourceStreamTaskTest.java b/flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/tasks/SourceStreamTaskTest.java
index 29bcf6b599066..5e47d36040b5e 100644
--- a/flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/tasks/SourceStreamTaskTest.java
+++ b/flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/tasks/SourceStreamTaskTest.java
@@ -708,7 +708,6 @@ public void acknowledgeCheckpoint(
             harness.streamTask.runMailboxLoop();
             harness.finishProcessing();
 
-            assertThat(triggerResult.isDone()).isTrue();
             assertThat(triggerResult.get()).isTrue();
             assertThat(checkpointCompleted.isDone()).isTrue();
         }