diff --git a/tests/suites/test_suite_ssl.function b/tests/suites/test_suite_ssl.function
index d4ff7fea57..79881b9834 100644
--- a/tests/suites/test_suite_ssl.function
+++ b/tests/suites/test_suite_ssl.function
@@ -5955,6 +5955,9 @@ void ssl_get_alert_after_fatal(void)
 
     TEST_ASSERT(mbedtls_ssl_setup(&ssl, &conf) == 0);
 
+    /* Invalid ssl context */
+    TEST_ASSERT(mbedtls_ssl_get_alert(NULL) == MBEDTLS_ERR_SSL_BAD_INPUT_DATA);
+
     /* No alert has been received yet */
     TEST_ASSERT(mbedtls_ssl_get_alert(&ssl) == MBEDTLS_ERR_SSL_BAD_INPUT_DATA);