diff --git a/packages/backend-common/src/reading/tree/ZipArchiveResponse.test.ts b/packages/backend-common/src/reading/tree/ZipArchiveResponse.test.ts
index a80f688436..444cbf60b1 100644
--- a/packages/backend-common/src/reading/tree/ZipArchiveResponse.test.ts
+++ b/packages/backend-common/src/reading/tree/ZipArchiveResponse.test.ts
@@ -246,7 +246,7 @@ describe('ZipArchiveResponse', () => {
     const filesPromise = res.files();
 
     await expect(filesPromise).rejects.toThrow(
-      'invalid comment length. expected: 55. found: 0',
+      /Invalid comment length. Expected: 55. Found: 0/,
     );
   });