diff --git a/t/t3305-notes-fanout.sh b/t/t3305-notes-fanout.sh
index 54460beec4..831f83d211 100755
--- a/t/t3305-notes-fanout.sh
+++ b/t/t3305-notes-fanout.sh
@@ -35,15 +35,10 @@ test_expect_success 'many notes created with git-notes triggers fanout' '
 	git ls-tree -r --name-only refs/notes/commits |
 	while read path
 	do
-		case "$path" in
-		??/??????????????????????????????????????)
-			: true
-			;;
-		*)
+		echo $path | grep "^../[0-9a-f]*$" || {
 			echo "Invalid path \"$path\"" &&
-			return 1
-			;;
-		esac
+			return 1;
+		}
 	done
 '
 
@@ -77,15 +72,10 @@ test_expect_success 'deleting most notes triggers fanout consolidation' '
 	git ls-tree -r --name-only refs/notes/commits |
 	while read path
 	do
-		case "$path" in
-		????????????????????????????????????????)
-			: true
-			;;
-		*)
+		echo $path | grep -v "^../.*" || {
 			echo "Invalid path \"$path\"" &&
-			return 1
-			;;
-		esac
+			return 1;
+		}
 	done
 '