diff --git a/tests/src/com/android/camera/stress/SwitchPreview.java b/tests/src/com/android/camera/stress/SwitchPreview.java
index 6af915e..c5dd7c1 100755
--- a/tests/src/com/android/camera/stress/SwitchPreview.java
+++ b/tests/src/com/android/camera/stress/SwitchPreview.java
@@ -97,10 +97,13 @@
             for (int i=0; i< TOTAL_NUMBER_OF_SWITCHING; i++) {
                 Thread.sleep(WAIT_FOR_PREVIEW);
                 Intent intent = new Intent();
+                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                 intent.setClass(getInstrumentation().getTargetContext(),
                         VideoCamera.class);
                 getActivity().startActivity(intent);
                 Thread.sleep(WAIT_FOR_PREVIEW);
+                intent = new Intent();
+                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                 intent.setClass(getInstrumentation().getTargetContext(),
                         Camera.class);
                 getActivity().startActivity(intent);