diff --git a/pkgs/development/python-modules/webtest/default.nix b/pkgs/development/python-modules/webtest/default.nix
new file mode 100644
index 00000000000..d3dd321cb03
--- /dev/null
+++ b/pkgs/development/python-modules/webtest/default.nix
@@ -0,0 +1,37 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, nose
+, webob
+, six
+, beautifulsoup4
+, waitress
+, mock
+, pyquery
+, wsgiproxy2
+, PasteDeploy
+, coverage
+}:
+
+buildPythonPackage rec {
+  version = "2.0.20";
+  pname = "webtest";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0bv0qhdjakdsdgj4sk21gnpp8xp8bga4x03p6gjb83ihrsb7n4xv";
+  };
+
+  preConfigure = ''
+    substituteInPlace setup.py --replace "nose<1.3.0" "nose"
+  '';
+
+  propagatedBuildInputs = [ nose webob six beautifulsoup4 waitress mock pyquery wsgiproxy2 PasteDeploy coverage ];
+
+  meta = with stdenv.lib; {
+    description = "Helper to test WSGI applications";
+    homepage = http://webtest.readthedocs.org/en/latest/;
+    license = licenses.mit;
+  };
+
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index b57656a5a4a..5ea09977f1c 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4119,38 +4119,7 @@ in {
 
   websockify = callPackage ../development/python-modules/websockify { };
 
-  webtest = buildPythonPackage rec {
-    version = "2.0.20";
-    name = "webtest-${version}";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/W/WebTest/WebTest-${version}.tar.gz";
-      sha256 = "0bv0qhdjakdsdgj4sk21gnpp8xp8bga4x03p6gjb83ihrsb7n4xv";
-    };
-
-    preConfigure = ''
-      substituteInPlace setup.py --replace "nose<1.3.0" "nose"
-    '';
-
-    propagatedBuildInputs = with self; [
-      nose
-      webob
-      six
-      beautifulsoup4
-      waitress
-      mock
-      pyquery
-      wsgiproxy2
-      PasteDeploy
-      coverage
-    ];
-
-    meta = {
-      description = "Helper to test WSGI applications";
-      homepage = http://webtest.readthedocs.org/en/latest/;
-      platforms = platforms.all;
-    };
-  };
+  webtest = callPackage ../development/python-modules/webtest { };
 
   werkzeug = callPackage ../development/python-modules/werkzeug { };