diff --git a/tests/backup/Android.mk b/tests/backup/Android.mk
index 88794c2..202a699 100644
--- a/tests/backup/Android.mk
+++ b/tests/backup/Android.mk
@@ -20,7 +20,8 @@
 
 LOCAL_SRC_FILES := \
     backup_helper_test.cpp
- 
+
+LOCAL_CFLAGS := -Wall -Werror
 LOCAL_MODULE_TAGS := optional
 LOCAL_MODULE := backup_helper_test
 LOCAL_MODULE_PATH := $(TARGET_OUT_DATA_APPS)
@@ -43,4 +44,3 @@
 LOCAL_PROGUARD_ENABLED := disabled
 
 include $(BUILD_PACKAGE)
-    
diff --git a/tests/backup/backup_helper_test.cpp b/tests/backup/backup_helper_test.cpp
index b5f6ff5..457dcc4 100644
--- a/tests/backup/backup_helper_test.cpp
+++ b/tests/backup/backup_helper_test.cpp
@@ -118,7 +118,7 @@
 
 #else
 int
-main(int argc, char** argv)
+main(int, char**)
 {
     printf ("test_backup_helper built without the tests\n");
     return 0;