diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 6ee8ad5ebd50..c0908484325b 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -9447,8 +9447,8 @@ in {
 
     buildInputs = with self; [ nose sphinx numpydoc ];
 
-    # Failing test on Python 3.x
-    postPatch = '''' + optionalString isPy3k ''
+    # Failing test on Python 3.x and Darwin
+    postPatch = '''' + optionalString (isPy3k || stdenv.isDarwin) ''
       sed -i -e '70,84d' joblib/test/test_format_stack.py
       # test_nested_parallel_warnings: ValueError: Non-zero return code: -9.
       # Not sure why but it's nix-specific. Try removing for new joblib releases.