Add hmac_drbg_selftest()
diff --git a/tests/suites/test_suite_hmac_drbg.function b/tests/suites/test_suite_hmac_drbg.function
index 0699f08..0882696 100644
--- a/tests/suites/test_suite_hmac_drbg.function
+++ b/tests/suites/test_suite_hmac_drbg.function
@@ -269,3 +269,9 @@
 }
 /* END_CASE */
 
+/* BEGIN_CASE depends_on:POLARSSL_SELF_TEST */
+void hmac_drbg_selftest( )
+{
+    TEST_ASSERT( hmac_drbg_self_test( 0 ) == 0 );
+}
+/* END_CASE */