diff --git a/doc/testing/testplan/api_security_service/README.md b/doc/testing/testplan/api_security_service/README.md
index 7b871ccea5303a8cb253c429648ef9996f44f2c1..9ce8a8f4da492a5a30f632b27c38d37973c7bc52 100644
--- a/doc/testing/testplan/api_security_service/README.md
+++ b/doc/testing/testplan/api_security_service/README.md
@@ -1101,8 +1101,10 @@ At this documentation you will have all information and related files and exampl
   1. Response to Request of Access Token:
      1. **400 Bad Request** response.
      2. body returned must accomplish **AccessTokenErr** data structure, with:
-        * error unsupported_grant_type
-        * error_description=Invalid value for `grant_type` \\(${grant_type}\\), must be one of \\['client_credentials'\\] - 'grant_type'
+        * title=Bad Request
+        * detail='not_valid' is not one of \\['client_credentials', 'authorization_code'\\] - 'grant_type'
+        * status=400
+
 
 ## Test Case 25: Retrieve access token with invalid scope