diff --git a/frontend/sync-client/src/utils/locks.test.ts b/frontend/sync-client/src/utils/locks.test.ts
index f545e957..33d99da9 100644
--- a/frontend/sync-client/src/utils/locks.test.ts
+++ b/frontend/sync-client/src/utils/locks.test.ts
@@ -35,7 +35,7 @@ describe("Document lock", () => {
 	test("should throw an error when unlocking a document that is not locked", () => {
 		expect(() => {
 			locks.unlock(testPath);
-		}).toThrow(`Document ${testPath} is not locked, cannot unlock`);
+		}).toThrow(`Key '${testPath}' is not locked, cannot unlock`);
 	});
 
 	test("should wait for a document lock and resolve when unlocked", async () => {
diff --git a/frontend/sync-client/src/utils/locks.ts b/frontend/sync-client/src/utils/locks.ts
index 8e52cba0..77b3b767 100644
--- a/frontend/sync-client/src/utils/locks.ts
+++ b/frontend/sync-client/src/utils/locks.ts
@@ -67,7 +67,7 @@ export class Locks<T> {
 	 */
 	public unlock(key: T): void {
 		if (!this.locked.has(key)) {
-			throw new Error(`Key ${key} is not locked, cannot unlock`);
+			throw new Error(`Key '${key}' is not locked, cannot unlock`);
 		}
 
 		// Remove first waiter to ensure FIFO order