Fix string format compatibility

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/oauth2/rfc6749/clients/test_base.py b/tests/oauth2/rfc6749/clients/test_base.py
index b60c6a8..fd85d7b 100644
--- a/tests/oauth2/rfc6749/clients/test_base.py
+++ b/tests/oauth2/rfc6749/clients/test_base.py
@@ -217,7 +217,7 @@ class ClientTest(TestCase):
         u, h, b = client.prepare_refresh_token_request(url, token)
         self.assertEqual(u, url)
         self.assertEqual(h, {'Content-Type': 'application/x-www-form-urlencoded'})
-        self.assertEqual(b, 'grant_type=refresh_token&refresh_token={}'.format(token))
+        self.assertURLEqual(b, 'grant_type=refresh_token&refresh_token=%s' % token)
 
         # Non-HTTPS revocation endpoint
         self.assertRaises(InsecureTransportError,
@@ -228,11 +228,11 @@ class ClientTest(TestCase):
         u, h, b = client.prepare_refresh_token_request(url, token, scope=scope)
         self.assertEqual(u, url)
         self.assertEqual(h, {'Content-Type': 'application/x-www-form-urlencoded'})
-        self.assertEqual(b, 'grant_type=refresh_token&scope={}&refresh_token={}'.format(scope, token))
+        self.assertURLEqual(b, 'grant_type=refresh_token&scope=%s&refresh_token=%s' % (scope, token))
 
         # provide scope while init
         client = Client(self.client_id, scope=scope)
         u, h, b = client.prepare_refresh_token_request(url, token, scope=scope)
         self.assertEqual(u, url)
         self.assertEqual(h, {'Content-Type': 'application/x-www-form-urlencoded'})
-        self.assertEqual(b, 'grant_type=refresh_token&scope={}&refresh_token={}'.format(scope, token))
+        self.assertURLEqual(b, 'grant_type=refresh_token&scope=%s&refresh_token=%s' % (scope, token))