diff --git a/services/tests/servicestests/src/com/android/server/power/stats/MockBatteryStatsImpl.java b/services/tests/servicestests/src/com/android/server/power/stats/MockBatteryStatsImpl.java
index f8033557f0f0c..d78ab8677800e 100644
--- a/services/tests/servicestests/src/com/android/server/power/stats/MockBatteryStatsImpl.java
+++ b/services/tests/servicestests/src/com/android/server/power/stats/MockBatteryStatsImpl.java
@@ -231,6 +231,10 @@ public class MockBatteryStatsImpl extends BatteryStatsImpl {
         setExternalStatsSyncLocked(mExternalStatsSync);
     }
 
+    @Override
+    public void writeSyncLocked() {
+    }
+
     public static class DummyExternalStatsSync implements ExternalStatsSync {
         public int flags = 0;