diff --git a/tests/cfg/attributes.yml b/tests/cfg/attributes.yml
index 40fc3b7..27406ae 100644
--- a/tests/cfg/attributes.yml
+++ b/tests/cfg/attributes.yml
@@ -81,7 +81,7 @@ gidNumber:
     default: 10000
     backends:
         ldap: gidNumber
-        ad: GIDNumber
+        ad: gidNumber
 shell:
     description: "Shell of the user"
     display_name: "Shell"
diff --git a/tests/cfg/attributes_adldap.yml b/tests/cfg/attributes_adldap.yml
index db368e5..42d3637 100644
--- a/tests/cfg/attributes_adldap.yml
+++ b/tests/cfg/attributes_adldap.yml
@@ -88,7 +88,7 @@ gidNumber:
             - '30000'
     backends:
         ldap: gidNumber
-        ad: GIDNumber
+        ad: gidNumber
 shell:
     description: "Shell of the user"
     display_name: "Shell"