diff --git a/tests/src/helpers.c b/tests/src/helpers.c
index 724fb59..d0c75b0 100644
--- a/tests/src/helpers.c
+++ b/tests/src/helpers.c
@@ -288,7 +288,15 @@
 #endif /* MBEDTLS_THREADING_C */
 }
 
-#endif
+#endif /* MBEDTLS_BIGNUM_C */
+
+#ifdef MBEDTLS_TEST_MUTEX_USAGE
+mbedtls_threading_mutex_t *mbedtls_test_get_info_mutex(void)
+{
+    return &mbedtls_test_info_mutex;
+}
+
+#endif /* MBEDTLS_TEST_MUTEX_USAGE */
 
 /*----------------------------------------------------------------------------*/
 /* Helper Functions */