diff --git a/lib/workers/repository/update/pr/index.spec.ts b/lib/workers/repository/update/pr/index.spec.ts
index 425bc8d3bd6232e710ee3847f12283064ec11abb..68c855903caa95b01354acff09032209f74cff78 100644
--- a/lib/workers/repository/update/pr/index.spec.ts
+++ b/lib/workers/repository/update/pr/index.spec.ts
@@ -114,7 +114,9 @@ describe('workers/repository/update/pr/index', () => {
         platform.createPr.mockResolvedValueOnce(pr);
         limits.isLimitReached.mockReturnValueOnce(true);
 
-        const res = await ensurePr({ ...config, isVulnerabilityAlert: true });
+        const prConfig = { ...config, isVulnerabilityAlert: true };
+        delete prConfig.prTitle; // for coverage
+        const res = await ensurePr(prConfig);
 
         expect(res).toEqual({ type: 'with-pr', pr });
         expect(platform.createPr).toHaveBeenCalled();