diff --git a/keystonemiddleware/auth_token/__init__.py b/keystonemiddleware/auth_token/__init__.py
index 29253ed..f660566 100644
--- a/keystonemiddleware/auth_token/__init__.py
+++ b/keystonemiddleware/auth_token/__init__.py
@@ -860,9 +860,6 @@ class AuthProtocol(BaseAuthProtocol):
                 self._token_cache.store_invalid(token_hashes[0])
             self.log.warning(_LW('Authorization failed for token'))
             raise
-        except Exception:
-            self.log.critical(_LC('Unable to validate token'), exc_info=True)
-            raise webob.exc.HTTPInternalServerError()
 
         return data
 
diff --git a/keystonemiddleware/tests/unit/auth_token/test_auth_token_middleware.py b/keystonemiddleware/tests/unit/auth_token/test_auth_token_middleware.py
index 15138ce..ae34a6e 100644
--- a/keystonemiddleware/tests/unit/auth_token/test_auth_token_middleware.py
+++ b/keystonemiddleware/tests/unit/auth_token/test_auth_token_middleware.py
@@ -665,15 +665,6 @@ class CommonAuthTokenMiddlewareTest(object):
             self.call_middleware(headers={'X-Auth-Token': token},
                                  expected_status=503)
 
-    def test_unexpected_exception_in_validate_offline(self):
-        # When an unexpected exception is hit during _validate_offline,
-        # 500 is returned
-        token = self.token_dict['uuid_token_default']
-        with mock.patch.object(self.middleware, '_validate_offline',
-                               side_effect=Exception):
-            self.call_middleware(headers={'X-Auth-Token': token},
-                                 expected_status=500)
-
     def test_cached_revoked_uuid(self):
         # When the UUID token is cached and revoked, 401 is returned.
         self._test_cache_revoked(self.token_dict['uuid_token_default'])