diff --git a/pkgs/development/python-modules/green/default.nix b/pkgs/development/python-modules/green/default.nix
index 1493c78df834..a1167f24035d 100644
--- a/pkgs/development/python-modules/green/default.nix
+++ b/pkgs/development/python-modules/green/default.nix
@@ -1,18 +1,31 @@
-{ lib, buildPythonPackage, fetchPypi, isPy3k, colorama, coverage, termstyle, unidecode, mock, backports_shutil_get_terminal_size }:
+{ lib, buildPythonPackage, fetchPypi, isPy3k
+, colorama
+, coverage
+, termstyle
+, lxml
+, unidecode
+, mock
+, backports_shutil_get_terminal_size
+}:
 
 buildPythonPackage rec {
   pname = "green";
-  version = "2.13.1";
+  version = "3.0.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "ea6e2699a2e58df834d2c845fb2b076c12d4835daecfcb658c6bd5583ebf4b7d";
+    sha256 = "17cfgq0s02p5cjrsvcicqxiq6kflahjsd9pm03f054x7lpvqi5cv";
   };
 
   propagatedBuildInputs = [
-    colorama coverage termstyle unidecode
+    colorama coverage termstyle unidecode lxml
   ] ++ lib.optionals (!isPy3k) [ mock backports_shutil_get_terminal_size ];
 
+  # let green run it's own test suite
+  checkPhase = ''
+    $out/bin/green green
+  '';
+
   meta = with lib; {
     description = "Python test runner";
     homepage = https://github.com/CleanCut/green;