diff --git a/clients/src/test/java/org/apache/kafka/clients/consumer/internals/AbstractCoordinatorTest.java b/clients/src/test/java/org/apache/kafka/clients/consumer/internals/AbstractCoordinatorTest.java
index 969de83c328ff..84113d016b671 100644
--- a/clients/src/test/java/org/apache/kafka/clients/consumer/internals/AbstractCoordinatorTest.java
+++ b/clients/src/test/java/org/apache/kafka/clients/consumer/internals/AbstractCoordinatorTest.java
@@ -116,6 +116,7 @@ public class AbstractCoordinatorTest {
     public void closeCoordinator() {
         Utils.closeQuietly(coordinator, "close coordinator");
         Utils.closeQuietly(consumerClient, "close consumer client");
+        Utils.closeQuietly(mockClient, "close mock client");
     }
 
     private void setupCoordinator() {