diff --git a/pkgs/development/python-modules/httpretty/default.nix b/pkgs/development/python-modules/httpretty/default.nix
index cf78a618536..3a76bd9f148 100644
--- a/pkgs/development/python-modules/httpretty/default.nix
+++ b/pkgs/development/python-modules/httpretty/default.nix
@@ -36,6 +36,7 @@ buildPythonPackage rec {
   NOSE_EXCLUDE = stdenv.lib.concatStringsSep "," [
     "tests.functional.test_httplib2.test_callback_response"
     "tests.functional.test_requests.test_streaming_responses"
+    "tests.functional.test_httplib2.test_callback_response"
   ];
 
   meta = with stdenv.lib; {