diff --git a/types/mongoose/mongoose-tests.ts b/types/mongoose/mongoose-tests.ts
index 90259483f2..796ae086e3 100644
--- a/types/mongoose/mongoose-tests.ts
+++ b/types/mongoose/mongoose-tests.ts
@@ -1200,6 +1200,7 @@ aggregate.allowDiskUse(true).allowDiskUse(false, []);
 aggregate.append({ $project: { field: 1 }}, { $limit: 2 });
 aggregate.append([{ $match: { daw: 'Logic Audio X' }} ]);
 aggregate.collation({ locale: 'en_US', strength: 1 });
+aggregate.count('countName');
 aggregate.cursor({ batchSize: 1000 }).exec().each(cb);
 aggregate.exec().then(cb).catch(cb);
 aggregate.option({foo: 'bar'}).exec();