diff --git a/tests/AndroidManifest.xml b/tests/AndroidManifest.xml
index e987dee..c13be5f 100644
--- a/tests/AndroidManifest.xml
+++ b/tests/AndroidManifest.xml
@@ -61,6 +61,7 @@
         </service>
 
         <activity android:name="com.android.server.telecom.testapps.TestCallActivity"
+                android:theme="@android:style/Theme.NoDisplay"
                 android:label="@string/testCallActivityLabel">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />