diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index dca0dfbdc8..9ae461c53c 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -4294,7 +4294,7 @@ class JobLaunchSerializer(BaseSerializer):
                 errors.setdefault('credentials', []).append(_(
                     'Removing {} credential at launch time without replacement is not supported. '
                     'Provided list lacked credential(s): {}.'
-                ).format(cred.unique_hash(display=True), ', '.join([str(c) for c in removed_creds])))
+                ).format(cred.unique_hash(display=True), ', '.join([six.text_type(c) for c in removed_creds])))
 
         # verify that credentials (either provided or existing) don't
         # require launch-time passwords that have not been provided
diff --git a/awx/main/models/credential/__init__.py b/awx/main/models/credential/__init__.py
index 1996bb2537..a31131c198 100644
--- a/awx/main/models/credential/__init__.py
+++ b/awx/main/models/credential/__init__.py
@@ -419,7 +419,7 @@ class Credential(PasswordFieldsModel, CommonModelNameNotUnique, ResourceMixin):
             else:
                 fmt_str = six.text_type('{}_{}')
             return fmt_str.format(type_alias, self.inputs.get('vault_id'))
-        return str(type_alias)
+        return six.text_type(type_alias)
 
     @staticmethod
     def unique_dict(cred_qs):