diff --git a/tests/sourcehut-flakes.nix b/tests/sourcehut-flakes.nix
index d1d89d149..6a1930904 100644
--- a/tests/sourcehut-flakes.nix
+++ b/tests/sourcehut-flakes.nix
@@ -59,7 +59,7 @@ let
       echo 'ref: refs/heads/master' > $out/HEAD
 
       mkdir -p $out/info
-      echo '${nixpkgs.rev} refs/heads/master' > $out/info/refs
+      echo -e '${nixpkgs.rev}\trefs/heads/master' > $out/info/refs
     '';
 
 in