diff --git a/services/tests/wmtests/src/com/android/server/wm/TaskPositionerTests.java b/services/tests/wmtests/src/com/android/server/wm/TaskPositionerTests.java
index 7abe3698a99c1..d5356774ffdb7 100644
--- a/services/tests/wmtests/src/com/android/server/wm/TaskPositionerTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/TaskPositionerTests.java
@@ -88,7 +88,7 @@ public class TaskPositionerTests extends WindowTestsBase {
 
     @After
     public void tearDown() {
-        mPositioner = null;
+        TaskPositioner.setFactory(null);
     }
 
     @Test