diff --git a/tests/include/test/helpers.h b/tests/include/test/helpers.h
index 2c7b179..ce8a1e2 100644
--- a/tests/include/test/helpers.h
+++ b/tests/include/test/helpers.h
@@ -190,4 +190,8 @@
 void mbedtls_test_param_failed_reset_state( void );
 #endif /* MBEDTLS_CHECK_PARAMS */
 
+#if defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)
+#include "test/fake_external_rng_for_test.h"
+#endif
+
 #endif /* TEST_HELPERS_H */