diff --git a/tests/suites/test_suite_cipher.function b/tests/suites/test_suite_cipher.function
index 2efc434dc4..9dd96798a0 100644
--- a/tests/suites/test_suite_cipher.function
+++ b/tests/suites/test_suite_cipher.function
@@ -198,7 +198,7 @@ void cipher_invalid_param_unconditional( )
     (void)valid_mode; /* In some configurations this is unused */
 
     mbedtls_cipher_init( &valid_ctx );
-    mbedtls_cipher_setup( &valid_ctx, valid_info );
+    TEST_ASSERT( mbedtls_cipher_setup( &valid_ctx, valid_info ) == 0 );
     mbedtls_cipher_init( &invalid_ctx );
 
     /* mbedtls_cipher_setup() */