diff --git a/packages/core/__tests__/notebooks.test.js b/packages/core/__tests__/notebooks.test.js
index 3b9793864..fba60d650 100644
--- a/packages/core/__tests__/notebooks.test.js
+++ b/packages/core/__tests__/notebooks.test.js
@@ -55,10 +55,14 @@ test("updating notebook with empty title should throw", () =>
 test("parentId() returns parentId if notebook is a subnotebook", () =>
   notebookTest().then(async ({ db, id }) => {
     const subId = await db.notebooks.add({ title: "Sub", id });
-    expect(db.notebooks.parentId(subId)).toBe(id);
+    await db.relations.add(
+      { type: "notebook", id },
+      { type: "notebook", id, subId }
+    );
+    expect(await db.notebooks.parentId(subId)).toBe(id);
   }));
 
 test("parentId() returns undefined if notebook is not a subnotebook", () =>
   notebookTest().then(async ({ db, id }) => {
-    expect(db.notebooks.parentId(id)).toBeUndefined();
+    expect(await db.notebooks.parentId(id)).toBeUndefined();
   }));