diff --git a/api/src/components/publication/__tests__/createPublication.test.ts b/api/src/components/publication/__tests__/createPublication.test.ts
index 0d9c13097..b1450ceab 100644
--- a/api/src/components/publication/__tests__/createPublication.test.ts
+++ b/api/src/components/publication/__tests__/createPublication.test.ts
@@ -501,7 +501,7 @@ describe('Create live publication', () => {
 
         expect(createPublicationRequest.status).toEqual(201);
         expect(
-            createPublicationRequest.body.linkedTo.sort((a, b) => a.publicationToId - b.publicationToId)
+            createPublicationRequest.body.linkedTo.sort((a, b) => a.publicationToId.localeCompare(b.publicationToId))
         ).toMatchObject([
             { publicationToId: 'publication-problem-live', versionToId: 'publication-problem-live-v2', draft: false },
             {