diff --git a/tests/test-highlighting.zsh b/tests/test-highlighting.zsh
index 2498dee..7effc07 100755
--- a/tests/test-highlighting.zsh
+++ b/tests/test-highlighting.zsh
@@ -153,7 +153,7 @@ run_test_internal() {
   done
 
   if (( $#expected_region_highlight == $#region_highlight )); then
-    print -r -- "ok $i - cardinality check"
+    print -r -- "ok $i - cardinality check" "${expected_mismatch:+" # TODO : $expected_mismatch"}"
   else
     print -r -- "not ok $i - have $#expected_region_highlight expectations and $#region_highlight region_highlight entries: «$(typeset -p expected_region_highlight)» «$(typeset -p region_highlight)»" "${expected_mismatch:+" # TODO : $expected_mismatch"}"
   fi