diff --git a/streams/src/test/java/org/apache/kafka/streams/KafkaStreamsTest.java b/streams/src/test/java/org/apache/kafka/streams/KafkaStreamsTest.java
index 9770173f9945..8d1a9126b48a 100644
--- a/streams/src/test/java/org/apache/kafka/streams/KafkaStreamsTest.java
+++ b/streams/src/test/java/org/apache/kafka/streams/KafkaStreamsTest.java
@@ -424,6 +424,9 @@ public void apply(final String key, final String value) {
         } finally {
             // stop the thread so we don't interfere with other tests etc
             keepRunning.set(false);
+            if (streams != null) {
+                streams.close();
+            }
         }
     }