diff --git a/oidc_provider/tests/test_userinfo_endpoint.py b/oidc_provider/tests/test_userinfo_endpoint.py
index 5fe48f0..9fb92a3 100644
--- a/oidc_provider/tests/test_userinfo_endpoint.py
+++ b/oidc_provider/tests/test_userinfo_endpoint.py
@@ -75,4 +75,20 @@ class UserInfoTestCase(TestCase):
             is_header_field_ok = 'invalid_token' in response['WWW-Authenticate']
         except KeyError:
             is_header_field_ok = False
+        self.assertEqual(is_header_field_ok, True)
+
+    def test_response_with_invalid_scope(self):
+        token = self._create_token()
+
+        token.scope = ['otherone']
+        token.save()
+
+        response = self._post_request(token.access_token)
+
+        self.assertEqual(response.status_code, 403)
+
+        try:
+            is_header_field_ok = 'insufficient_scope' in response['WWW-Authenticate']
+        except KeyError:
+            is_header_field_ok = False
         self.assertEqual(is_header_field_ok, True)
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