diff --git a/__mocks__/hydrooj.ts b/__mocks__/hydrooj.ts
new file mode 100644
index 000000000..65b4e35d6
--- /dev/null
+++ b/__mocks__/hydrooj.ts
@@ -0,0 +1 @@
+export * from '../packages/hydrooj/src/loader';
diff --git a/packages/geoip/test/lib.spec.ts b/packages/geoip/test/lib.spec.ts
index 71a2ddf7c..2dfefd28d 100644
--- a/packages/geoip/test/lib.spec.ts
+++ b/packages/geoip/test/lib.spec.ts
@@ -1,4 +1,3 @@
-jest.mock('hydrooj/src/loader');
 import 'hydrooj';
 import 'hydrooj/src/lib/i18n';
 import * as lib from '@hydrooj/geoip/lib';
diff --git a/packages/hydrooj/src/model/oplog.ts b/packages/hydrooj/src/model/oplog.ts
index ce82a4a05..39a611a08 100644
--- a/packages/hydrooj/src/model/oplog.ts
+++ b/packages/hydrooj/src/model/oplog.ts
@@ -4,8 +4,8 @@ import * as db from '../service/db';
 
 export const coll = db.collection('oplog');
 
-export async function add(data: Partial<OplogDoc>): Promise<ObjectID> {
-    const res = await coll.insertOne(data);
+export async function add(data: Partial<OplogDoc> & { type: string }): Promise<ObjectID> {
+    const res = await coll.insertOne({ _id: new ObjectID(), ...data });
     return res.insertedId;
 }