pythonPackages.clize: fix tests

pkgs/development/python-modules/clize/default.nix

@@ -8,8 +8,9 @@
 , od
 , docutils
 , repeated_test
-, unittest2
 , pygments
+, unittest2
+, pytest
 }:
 
 buildPythonPackage rec {
@@ -26,6 +27,7 @@ buildPythonPackage rec {
     pygments
     repeated_test
     unittest2
+    pytest
   ];
 
   propagatedBuildInputs = [
@@ -36,6 +38,10 @@ buildPythonPackage rec {
     six
   ];
 
+  checkPhase = ''
+    pytest
+  '';
+
   meta = with stdenv.lib; {
     description = "Command-line argument parsing for Python";
     homepage = "https://github.com/epsy/clize";