diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 6fc3a140eb8..46a1324aab5 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1377,7 +1377,7 @@ in {
       sha256 = "1aqmy3psn12lxgp659d0zsxkirxzy5lnbnzxf9xjq1a93s3qm704";
     };
 
-    buildInputs = with self; [ pkgs.libev cython ] ++ optionals doCheck [ scales eventlet twisted mock gevent nose pytz pyyaml sure ];
+    buildInputs = with self; [ pkgs.libev cython ];
 
     propagatedBuildInputs = with self; [ futures six ];
 
@@ -1390,6 +1390,8 @@ in {
       ${python.interpreter} setup.py eventlet_nosetests
     '';
 
+    checkInputs = [ scales eventlet twisted mock gevent nose pytz pyyaml sure ];
+
     # Could not get tests running
     doCheck = false;