diff --git a/flake.nix b/flake.nix
index 02b047f..9bf36ab 100644
--- a/flake.nix
+++ b/flake.nix
@@ -38,7 +38,7 @@
       nativeCheckInputs = [ lua51Packages.busted util-linux neovim ];
       # filter out one test that fails in the sandbox of nix
       preCheck = let
-        exclude-tags = if stdenv.isDarwin then "nix,mac" else "nix";
+        exclude-tags = if stdenv.isDarwin then "nix" else "nix";
       in ''
       checkFlagsArray+=('BUSTED=busted --output TAP --exclude-tags=${exclude-tags}')
        '';