Fix some dependencies in tests
diff --git a/tests/suites/test_suite_gcm.function b/tests/suites/test_suite_gcm.function
index 58de577..349945a 100644
--- a/tests/suites/test_suite_gcm.function
+++ b/tests/suites/test_suite_gcm.function
@@ -108,7 +108,7 @@
 }
 /* END_CASE */
 
-/* BEGIN_CASE */
+/* BEGIN_CASE depends_on:POLARSSL_SELFTEST_C */
 void gcm_selftest()
 {
     TEST_ASSERT( gcm_self_test( 0 ) == 0 );