diff --git a/pkgs/development/python-modules/notebook/default.nix b/pkgs/development/python-modules/notebook/default.nix
index 116fa153cdad..bab3aa590ec6 100644
--- a/pkgs/development/python-modules/notebook/default.nix
+++ b/pkgs/development/python-modules/notebook/default.nix
@@ -68,6 +68,7 @@ buildPythonPackage rec {
     "launch_socket"
     "sock_server"
     "test_list_formats" # tries to find python MIME type
+    "KernelCullingTest" # has a race condition failing on slower hardware
   ] ++ lib.optional stdenv.isDarwin [
     "test_delete"
     "test_checkpoints_follow_file"