diff --git a/nix/create-shell.nix b/nix/create-shell.nix
index 155bed530..e57a11c0f 100644
--- a/nix/create-shell.nix
+++ b/nix/create-shell.nix
@@ -23,6 +23,7 @@ with pkgs; let
           openlane
           pyfakefs
           pytest
+          pytest-xdist
           pillow
           mdformat
         ]
diff --git a/test/steps/all b/test/steps/all
index aa0b63ac5..4283de670 160000
--- a/test/steps/all
+++ b/test/steps/all
@@ -1 +1 @@
-Subproject commit aa0b63ac5012c26a10b7719267e6dfd92fe2a45a
+Subproject commit 4283de670621a210d086cd56f77502ea2c8b99c4