diff --git a/services/surfaceflinger/tests/vsync/Android.mk b/services/surfaceflinger/tests/vsync/Android.mk
index 9181760..8e41617 100644
--- a/services/surfaceflinger/tests/vsync/Android.mk
+++ b/services/surfaceflinger/tests/vsync/Android.mk
@@ -15,4 +15,6 @@
 
 LOCAL_MODULE_TAGS := tests
 
+LOCAL_CFLAGS := -Werror
+
 include $(BUILD_EXECUTABLE)
diff --git a/services/surfaceflinger/tests/vsync/vsync.cpp b/services/surfaceflinger/tests/vsync/vsync.cpp
index aa72c79..a1b45e6 100644
--- a/services/surfaceflinger/tests/vsync/vsync.cpp
+++ b/services/surfaceflinger/tests/vsync/vsync.cpp
@@ -20,7 +20,7 @@
 
 using namespace android;
 
-int receiver(int fd, int events, void* data)
+int receiver(int /*fd*/, int /*events*/, void* data)
 {
     DisplayEventReceiver* q = (DisplayEventReceiver*)data;
 
@@ -47,7 +47,7 @@
     return 1;
 }
 
-int main(int argc, char** argv)
+int main(int /*argc*/, char** /*argv*/)
 {
     DisplayEventReceiver myDisplayEvent;
 
diff --git a/services/surfaceflinger/tests/waitforvsync/Android.mk b/services/surfaceflinger/tests/waitforvsync/Android.mk
index c25f5ab..932d2be 100644
--- a/services/surfaceflinger/tests/waitforvsync/Android.mk
+++ b/services/surfaceflinger/tests/waitforvsync/Android.mk
@@ -11,4 +11,6 @@
 
 LOCAL_MODULE_TAGS := tests
 
+LOCAL_CFLAGS := -Werror
+
 include $(BUILD_EXECUTABLE)
diff --git a/services/surfaceflinger/tests/waitforvsync/waitforvsync.cpp b/services/surfaceflinger/tests/waitforvsync/waitforvsync.cpp
index b88b04a..65eaae5 100644
--- a/services/surfaceflinger/tests/waitforvsync/waitforvsync.cpp
+++ b/services/surfaceflinger/tests/waitforvsync/waitforvsync.cpp
@@ -29,7 +29,7 @@
 #define FBIO_WAITFORVSYNC   _IOW('F', 0x20, __u32)
 #endif
 
-int main(int argc, char** argv) {
+int main(int /*argc*/, char** /*argv*/) {
     int fd = open("/dev/graphics/fb0", O_RDWR);
     if (fd >= 0) {
         do {