diff --git a/pkgs/development/python-modules/testtools/default.nix b/pkgs/development/python-modules/testtools/default.nix
index e2dfdcbe3ece..84900ad5477e 100644
--- a/pkgs/development/python-modules/testtools/default.nix
+++ b/pkgs/development/python-modules/testtools/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage rec {
     sha256 = "57c13433d94f9ffde3be6534177d10fb0c1507cc499319128958ca91a65cb23f";
   };
 
-  propagatedBuildInputs = [ pbr python-mimeparse extras unittest2 ];
+  propagatedBuildInputs = [ pbr python-mimeparse extras ];
   buildInputs = [ traceback2 ];
 
   # testscenarios has a circular dependency on testtools