diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 2acfa029088..d8d4e680893 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4976,6 +4976,7 @@ in {
     checkPhase = ''
       py.test testing
     '';
+    __darwinAllowLocalNetworking = true;
     meta = {
       description = "Rapid multi-Python deployment";
       license = licenses.gpl2;