diff --git a/oauthlib/oauth2/rfc6749/parameters.py b/oauthlib/oauth2/rfc6749/parameters.py
index 01079338..9ea8c446 100644
--- a/oauthlib/oauth2/rfc6749/parameters.py
+++ b/oauthlib/oauth2/rfc6749/parameters.py
@@ -362,16 +362,13 @@ def parse_token_response(body, scope=None):
         #   https://github.com/oauthlib/oauthlib/issues/267
 
         params = dict(urlparse.parse_qsl(body))
-        for key in ('expires_in', 'expires'):
-            if key in params:  # cast a couple things to int
+        for key in ('expires_in',):
+            if key in params:  # cast things to int
                 params[key] = int(params[key])
 
     if 'scope' in params:
         params['scope'] = scope_to_list(params['scope'])
 
-    if 'expires' in params:
-        params['expires_in'] = params.pop('expires')
-
     if 'expires_in' in params:
         params['expires_at'] = time.time() + int(params['expires_in'])
 
diff --git a/tests/oauth2/rfc6749/test_parameters.py b/tests/oauth2/rfc6749/test_parameters.py
index 2a9cbe80..6ba98c02 100644
--- a/tests/oauth2/rfc6749/test_parameters.py
+++ b/tests/oauth2/rfc6749/test_parameters.py
@@ -115,13 +115,6 @@ def setUp(self):
                    '   "refresh_token": "tGzv3JOkF0XG5Qx2TlKWIA",'
                    '   "example_parameter": "example_value" }')
 
-    json_expires = ('{ "access_token": "2YotnFZFEjr1zCsicMWpAA",'
-                    '  "token_type": "example",'
-                    '  "expires": 3600,'
-                    '  "refresh_token": "tGzv3JOkF0XG5Qx2TlKWIA",'
-                    '  "example_parameter": "example_value",'
-                    '  "scope":"abc def"}')
-
     json_dict = {
        'access_token': '2YotnFZFEjr1zCsicMWpAA',
        'token_type': 'example',
@@ -264,7 +257,3 @@ def record_scope_change(sender, message, old, new):
         finally:
             signals.scope_changed.disconnect(record_scope_change)
         del os.environ['OAUTHLIB_RELAX_TOKEN_SCOPE']
-
-    def test_token_response_with_expires(self):
-        """Verify fallback for alternate spelling of expires_in. """
-        self.assertEqual(parse_token_response(self.json_expires), self.json_dict)