diff --git a/types/mongoose/index.d.ts b/types/mongoose/index.d.ts
index c18daef6d1..e0ad97b71c 100644
--- a/types/mongoose/index.d.ts
+++ b/types/mongoose/index.d.ts
@@ -371,6 +371,8 @@ declare module "mongoose" {
     useNewUrlParser?: boolean;
     /** Set to false to make findOneAndUpdate() and findOneAndRemove() use native findOneAndUpdate() rather than findAndModify(). */
     useFindAndModify?: boolean;
+    /** Flag for using new Server Discovery and Monitoring engine instead of current (deprecated) one */
+    useUnifiedTopology?: boolean;
 
     // Legacy properties - passed to the connection server instance(s)
     mongos?: any;
diff --git a/types/mongoose/mongoose-tests.ts b/types/mongoose/mongoose-tests.ts
index 392cccee02..2f71817fe2 100644
--- a/types/mongoose/mongoose-tests.ts
+++ b/types/mongoose/mongoose-tests.ts
@@ -27,6 +27,7 @@ const connection2: Promise<mongoose.Mongoose> = mongoose.connect(connectUri, {
   bufferCommands: false,
   useNewUrlParser: true,
   useFindAndModify: true,
+  useUnifiedTopology: true,
   useCreateIndex: true,
   autoIndex: true,
   autoCreate: true,