diff --git a/tests/functional/flakes/flakes.sh b/tests/functional/flakes/flakes.sh
index a74d56a5b..35b0c5d84 100644
--- a/tests/functional/flakes/flakes.sh
+++ b/tests/functional/flakes/flakes.sh
@@ -237,7 +237,9 @@ nix build -o "$TEST_ROOT/result" --expr "(builtins.getFlake \"git+file://$flake1
 # Regression test for baseNameOf on the root of the flake.
 [[ $(nix eval --raw flake1#baseName) =~ ^[a-z0-9]+-source$ ]]
 
-# Test that the root of a tree returns a path named /nix/store/<hash1>-<hash2>-source (#10627).
+# Test that the root of a tree returns a path named /nix/store/<hash1>-<hash2>-source.
+# This behavior is *not* desired, but has existed for a while.
+# Issue #10627 what to do about it.
 [[ $(nix eval --raw flake1#root) =~ ^.*/[a-z0-9]+-[a-z0-9]+-source$ ]]
 
 # Building a flake with an unlocked dependency should fail in pure mode.