Test that mbedtls_aria_free() accepts NULL parameter
diff --git a/tests/suites/test_suite_aria.function b/tests/suites/test_suite_aria.function
index 586b2d3..d392cfd 100644
--- a/tests/suites/test_suite_aria.function
+++ b/tests/suites/test_suite_aria.function
@@ -27,6 +27,7 @@
     size_t iv_off = 0;
 
     TEST_INVALID_PARAM( mbedtls_aria_init( NULL ) );
+    TEST_VALID_PARAM( mbedtls_aria_free( NULL ) );
 
     TEST_INVALID_PARAM_RET( MBEDTLS_ERR_ARIA_BAD_INPUT_DATA,
                             mbedtls_aria_setkey_enc( NULL, key,