diff --git a/packages/git-ci/test/daemon.test.js b/packages/git-ci/test/daemon.test.js
index 9e8c80b..819c7af 100644
--- a/packages/git-ci/test/daemon.test.js
+++ b/packages/git-ci/test/daemon.test.js
@@ -161,6 +161,18 @@ describe('createStateStore', () => {
     chmodSync(readOnly, 0o700);
   });
 
+  it('carries on with no warning callback at all', () => {
+    const readOnly = join(dir, 'locked-quiet');
+    mkdirSync(readOnly);
+    chmodSync(readOnly, 0o500);
+    const store = createStateStore(join(readOnly, 'state.json'));
+
+    expect(() => store.setCursor(SERVICE, 7)).not.toThrow();
+    expect(store.cursor(SERVICE)).toBe(7);
+
+    chmodSync(readOnly, 0o700);
+  });
+
   it('starts empty when the file is absent or unreadable', () => {
     const store = createStateStore(join(dir, 'missing', 'state.json'));
     expect(store.cursor(SERVICE)).toBeUndefined();