diff --git a/.travis.yml b/.travis.yml
index 4564cc1b6..67641bd6b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,10 +14,9 @@ dist: xenial
 language: node_js
 
 node_js:
-  - "12"
-  - "14"
   - "16"
-
+  # - "18"
+  # - "20"
 env:
   global:
     - WATERLINE_ADAPTER_TESTS_URL=localhost/testdb
diff --git a/appveyor.yml b/appveyor.yml
index c68b2724d..8628af7fd 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -12,22 +12,20 @@
 
 # Test against these versions of Node.js.
 environment:
-  WATERLINE_ADAPTER_TESTS_URL: localhost/testdb
-  WATERLINE_ADAPTER_TESTS_HOST: localhost
+  WATERLINE_ADAPTER_TESTS_URL: 127.0.0.1/testdb
+  WATERLINE_ADAPTER_TESTS_HOST: 127.0.0.1
   WATERLINE_ADAPTER_TESTS_DATABASE: sails-mongo
   NODE_ENV: test
   matrix:
-    - nodejs_version: "10"
-    - nodejs_version: "12"
-    - nodejs_version: "14"
+    - nodejs_version: "16"
+    - nodejs_version: "18"
+    - nodejs_version: "20"
 
 # Install scripts. (runs after repo cloning)
 install:
   # Get the latest stable version of Node.js
   # (Not sure what this is for, it's just in Appveyor's example.)
   - ps: Install-Product node $env:nodejs_version
-  # Don't let npm send metrics as it creates a file in the .npm folder invalidating the cache every time
-  - npm config set send-metrics false
   # Install declared dependencies
   - npm install --no-audit
 
diff --git a/docker-compose.yml b/docker-compose.yml
index f4a773433..6f7ac00da 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,22 +1,24 @@
-adapter:
-  image: node:12
-  volumes:
-    - $PWD:/home/node/sails-mongo
-  links:
-    - mongo
-  environment:
-    - WATERLINE_ADAPTER_TESTS_DATABASE=sails-mongo
-    - WATERLINE_ADAPTER_TESTS_URL=mongo/testdb
-    - WATERLINE_ADAPTER_TESTS_HOST=mongo
-    - NODE_ENV=test
-  user: node
-  working_dir: /home/node/sails-mongo
-  command:
-    - bash -c "npm test"
+version: '3'
+services:
+  adapter:
+    image: node:20
+    volumes:
+      - $PWD:/home/node/sails-mongo
+    links:
+      - mongo
+    environment:
+      - WATERLINE_ADAPTER_TESTS_DATABASE=sails-mongo
+      - WATERLINE_ADAPTER_TESTS_URL=mongo/testdb
+      - WATERLINE_ADAPTER_TESTS_HOST=mongo
+      - NODE_ENV=test
+    user: node
+    working_dir: /home/node/sails-mongo
+    command:
+      - bash -c "npm test"
 
-mongo:
-  image: mongo:4.2
-  restart: always
-  command: "--logpath=/dev/null"
-  ports:
-    - "27017:27017"
+  mongo:
+    image: mongo:7
+    restart: always
+    command: "--logpath=/dev/null"
+    ports:
+      - "27017:27017"
diff --git a/lib/index.js b/lib/index.js
index 531c779fb..5a45a280f 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -810,7 +810,7 @@ module.exports = {
 
       // Create the index on the Mongo collection.
       // (https://docs.mongodb.com/manual/reference/method/db.collection.createIndex)
-      mongoCollection.createIndex(mongoSingleFieldIdxKeys, { unique: true }, function (err) {
+      (function(iifeDone) { mongoCollection.createIndex(mongoSingleFieldIdxKeys, { unique: true }).then(function() { iifeDone(); }).catch(function(err) {iifeDone(err);});})(function (err) {
         if (err && !_.isError(err)) {
           err = flaverr({raw: err}, new Error('Consistency violation: Expecting Error instance, but instead got: '+util.inspect(err)));
           return next(err);
@@ -859,7 +859,7 @@ module.exports = {
 
     // Drop the physical model (e.g. table/etc.)
     var db = dsEntry.manager;
-    db.collection(tableName).drop(function (err) {
+    (function(iifeDone) { db.collection(tableName).drop().then(function() {iifeDone();}).catch(function(err) {iifeDone(err);});})(function (err) {
       try {
 
         if (err) {
diff --git a/lib/private/machines/avg-records.js b/lib/private/machines/avg-records.js
index d48ec9f4c..377b722c7 100644
--- a/lib/private/machines/avg-records.js
+++ b/lib/private/machines/avg-records.js
@@ -76,7 +76,7 @@ module.exports = {
       }
     ], { cursor: {} });
 
-    cursor.toArray(function aggregateCb(err, nativeResult) {
+    (function(iifeDone) { cursor.toArray().then(function(nativeResult) { iifeDone(undefined, nativeResult); }).catch(function (err){iifeDone(err);}); })(function aggregateCb(err, nativeResult) {
       if (err) { return exits.error(err); }
 
       var mean = 0;
diff --git a/lib/private/machines/count-records.js b/lib/private/machines/count-records.js
index 5d0e7156b..9a4d82ca6 100644
--- a/lib/private/machines/count-records.js
+++ b/lib/private/machines/count-records.js
@@ -61,7 +61,7 @@ module.exports = {
     //  ╚═╝╚═╝╩ ╩╩ ╩╚═╝╝╚╝╩╚═╝╩ ╩ ╩ ╚═╝  └┴┘┴ ┴ ┴ ┴  ─┴┘└─┘
     var db = inputs.connection;
     var mongoCollection = db.collection(tableName);
-    mongoCollection.find(mongoWhere).count(function countCb(err, nativeResult) {
+    (function(iifeDone) { mongoCollection.countDocuments(mongoWhere).then(function(nativeResult) { iifeDone(undefined, nativeResult);}).catch(function(err) { iifeDone(err);});})(function countCb(err, nativeResult) {
       if (err) { return exits.error(err); }
 
       return exits.success(nativeResult);
diff --git a/lib/private/machines/create-each-record.js b/lib/private/machines/create-each-record.js
index 57ad7cd83..6c3c49357 100644
--- a/lib/private/machines/create-each-record.js
+++ b/lib/private/machines/create-each-record.js
@@ -29,6 +29,7 @@ module.exports = {
 
   fn: function (inputs, exits) {
     // Dependencies
+    var util = require('util');
     var _ = require('@sailshq/lodash');
     var processNativeRecord = require('./private/process-native-record');
     var processNativeError = require('./private/process-native-error');
@@ -82,7 +83,7 @@ module.exports = {
     // if (s3q.meta && s3q.meta.logMongoS3Qs) {
     //   console.log('- - - - - - -  - - -CREATE EACH: s3q.newRecords:',require('util').inspect(s3q.newRecords,{depth:5}),'\n');
     // }
-    mongoCollection.insertMany(s3q.newRecords, function (err, nativeResult) {
+    (function(iifeDone){  mongoCollection.insertMany(s3q.newRecords).then(function(nativeResult) { iifeDone(undefined, nativeResult);}).catch(function(err) { iifeDone(err);});})(function(err, nativeResult) {
       if (err) {
         err = processNativeError(err);
         if (err.footprint && err.footprint.identity === 'notUnique') {
@@ -97,6 +98,12 @@ module.exports = {
         return exits.success();
       }//-•
 
+      // Sanity check: Verify that IDs were sent back.
+      if (_.isUndefined(nativeResult.insertedIds) || !_.isObject(nativeResult.insertedIds)) {
+        return exits.error(new Error('Consistency violation: Unable to retrieve valid insertedIds from the result. This might indicate a consistency violation. Native result details:\n```\n' + util.inspect(nativeResult, {depth: 5}) + '\n```'));
+      }
+
+      var insertedIds = Object.values(nativeResult.insertedIds);
 
       // Otherwise, IWMIH we'll be sending back records:
       // ============================================
@@ -104,16 +111,20 @@ module.exports = {
       //  ╔═╗╦═╗╔═╗╔═╗╔═╗╔═╗╔═╗  ┌┐┌┌─┐┌┬┐┬┬  ┬┌─┐  ┬─┐┌─┐┌─┐┌─┐┬─┐┌┬┐┌─┌─┐─┐
       //  ╠═╝╠╦╝║ ║║  ║╣ ╚═╗╚═╗  │││├─┤ │ │└┐┌┘├┤   ├┬┘├┤ │  │ │├┬┘ │││ └─┐ │
       //  ╩  ╩╚═╚═╝╚═╝╚═╝╚═╝╚═╝  ┘└┘┴ ┴ ┴ ┴ └┘ └─┘  ┴└─└─┘└─┘└─┘┴└──┴┘└─└─┘─┘
-      // Process record(s) (mutate in-place) to wash away adapter-specific eccentricities.
-      var phRecords = nativeResult.ops;
-      try {
-        _.each(phRecords, function (phRecord){
-          processNativeRecord(phRecord, WLModel, s3q.meta);
-        });
-      } catch (e) { return exits.error(e); }
-
-      return exits.success(phRecords);
-
+      // Use the new record ID(s) to find the record(s) that were created.
+      (function(iifeDone){ mongoCollection.find({ _id: { $in: insertedIds } }).toArray().then(function(phRecords) { iifeDone(undefined, phRecords); }).catch(function(err) { iifeDone(err);});})(function(err, phRecords) {
+        if (err) {
+          return exits.error(err);
+        }
+        try {
+          _.each(phRecords, function (phRecord){
+            // Process record(s) (mutate in-place) to wash away adapter-specific eccentricities.
+            processNativeRecord(phRecord, WLModel, s3q.meta);
+          });
+        } catch (e) { return exits.error(e); }
+
+        return exits.success(phRecords);
+      });
     }); // </ mongoCollection.insertMany() >
 
   }
diff --git a/lib/private/machines/create-manager.js b/lib/private/machines/create-manager.js
index bd64f0d4d..0c8447109 100644
--- a/lib/private/machines/create-manager.js
+++ b/lib/private/machines/create-manager.js
@@ -125,16 +125,8 @@ module.exports = {
     var mongoUrl = _clientConfig.url;
     _clientConfig = _.omit(_clientConfig, ['url', 'user', 'password', 'host', 'port', 'database']);
 
-    // Use unified topology. MongoDB node maintainers recommends this to be enabled
-    // https://github.com/mongodb/node-mongodb-native/releases/tag/v3.2.1
-    // Use new url parser to remove warnings
-    _clientConfig = Object.assign({
-      useNewUrlParser: true,
-      useUnifiedTopology: true
-    }, _clientConfig);
-
-    // http://mongodb.github.io/node-mongodb-native/3.5/api/MongoClient.html#.connect
-    NodeMongoDBNativeLib.MongoClient.connect(mongoUrl, _clientConfig, function connectCb(err, client) {
+    // https://mongodb.github.io/node-mongodb-native/6.3/classes/MongoClient.html#connect
+    (function(iifeDone){ NodeMongoDBNativeLib.MongoClient.connect(mongoUrl, _clientConfig).then(function(client){ iifeDone(undefined, client);}).catch(function(err) { iifeDone(err);});})(function(err, client){
       if (err) {
         return exits.error(err);
       }
diff --git a/lib/private/machines/create-record.js b/lib/private/machines/create-record.js
index 22d390657..830e37897 100644
--- a/lib/private/machines/create-record.js
+++ b/lib/private/machines/create-record.js
@@ -76,7 +76,7 @@ module.exports = {
     // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
     var db = inputs.connection;
     var mongoCollection = db.collection(tableName);
-    mongoCollection.insertOne(s3q.newRecord, function (err, nativeResult) {
+    (function(iifeDone){ mongoCollection.insertOne(s3q.newRecord).then(function(nativeResult) { iifeDone(undefined, nativeResult);}).catch(function(err){ iifeDone(err);});})(function(err, nativeResult) {
       if (err) {
         err = processNativeError(err);
         if (err.footprint && err.footprint.identity === 'notUnique') {
@@ -102,23 +102,28 @@ module.exports = {
 
       // Otherwise, IWMIH we'll be sending back a record:
       // ============================================
-
-      // Sanity check: Verify that there is only one record.
-      if (nativeResult.ops.length !== 1) {
-        return exits.error(new Error('Consistency violation: Unexpected # of records returned from Mongo (in `.ops`).  Native result:\n```\n'+util.inspect(nativeResult, {depth: 5})+'\n```'));
+      // Sanity check: Verify that an ID was sent back.
+      if (_.isUndefined(nativeResult.insertedId)) {
+        return exits.error(new Error('Consistency violation: Unable to retrieve insertedId from the result. This might indicate a consistency violation. Native result details:\n```\n' + util.inspect(nativeResult, {depth: 5}) + '\n```'));
       }
 
+
       //  ╔═╗╦═╗╔═╗╔═╗╔═╗╔═╗╔═╗  ┌┐┌┌─┐┌┬┐┬┬  ┬┌─┐  ┬─┐┌─┐┌─┐┌─┐┬─┐┌┬┐
       //  ╠═╝╠╦╝║ ║║  ║╣ ╚═╗╚═╗  │││├─┤ │ │└┐┌┘├┤   ├┬┘├┤ │  │ │├┬┘ ││
       //  ╩  ╩╚═╚═╝╚═╝╚═╝╚═╝╚═╝  ┘└┘┴ ┴ ┴ ┴ └┘ └─┘  ┴└─└─┘└─┘└─┘┴└──┴┘
-      // Process record (mutate in-place) to wash away adapter-specific eccentricities.
-      var phRecord = nativeResult.ops[0];
-      try {
-        processNativeRecord(phRecord, WLModel, s3q.meta);
-      } catch (e) { return exits.error(e); }
-
-      // Then send it back.
-      return exits.success(phRecord);
+      // Use the new record ID to find the record that was created.
+      (function(iifeDone) { mongoCollection.findOne({ _id: nativeResult.insertedId }).then(function(phRecord) { iifeDone(undefined, phRecord);}).catch(function(err) { iifeDone(err);});})(function(err, phRecord) {
+        if (err) {
+          return exits.error(err);
+        }
+        try {
+          // Process record (mutate in-place) to wash away adapter-specific eccentricities.
+          processNativeRecord(phRecord, WLModel, s3q.meta);
+        } catch (e) { return exits.error(e); }
+
+        // Then send it back.
+        return exits.success(phRecord);
+      });
 
     }); // </ mongoCollection.insertOne() >
   }
diff --git a/lib/private/machines/destroy-records.js b/lib/private/machines/destroy-records.js
index 38833766b..5ea9c5e93 100644
--- a/lib/private/machines/destroy-records.js
+++ b/lib/private/machines/destroy-records.js
@@ -87,7 +87,7 @@ module.exports = {
       }
 
       // Find matching records.
-      mongoCollection.find(mongoWhere).toArray(function findCb(err, nativeResult) {
+      (function(iifeDone) {mongoCollection.find(mongoWhere).toArray().then(function findCb(nativeResult) { iifeDone(undefined, nativeResult);}).catch(function(err) { iifeDone(err);});})(function findCb(err, nativeResult) {
         if (err) { return proceed(err); }
         return proceed(undefined, nativeResult);
       });
@@ -104,7 +104,7 @@ module.exports = {
         secondaryMongoWhere = {};
         secondaryMongoWhere[pkColumnName] = { '$in': _.pluck(phRecords, pkColumnName) };
       }
-      mongoCollection.deleteMany(secondaryMongoWhere, function deleteCb(err) {
+      (function(iifeDone) { mongoCollection.deleteMany(secondaryMongoWhere).then(function() { iifeDone();}).catch(function(err) { iifeDone(err);});})(function deleteCb(err) {
         if (err) { return exits.error(err); }
 
         if (!isFetchEnabled) {
diff --git a/lib/private/machines/find-records.js b/lib/private/machines/find-records.js
index e5b53bfc1..3473ba23f 100644
--- a/lib/private/machines/find-records.js
+++ b/lib/private/machines/find-records.js
@@ -117,7 +117,7 @@ module.exports = {
     //  ║  ║ ║║║║║║║║ ║║║║║║  ╠═╣ ║ ║╣   ││││ │ ├─┤   ││├┴┐
     //  ╚═╝╚═╝╩ ╩╩ ╩╚═╝╝╚╝╩╚═╝╩ ╩ ╩ ╚═╝  └┴┘┴ ┴ ┴ ┴  ─┴┘└─┘
     // Find the documents in the db.
-    mongoDeferred.toArray(function findCb(err, nativeResult) {
+    (function(iifeDone) { mongoDeferred.toArray().then(function(nativeResult) { iifeDone(undefined, nativeResult);}).catch(function(err) { iifeDone(err);});})(function findCb(err, nativeResult) {
       if (err) { return exits.error(err); }
 
       //  ╔═╗╦═╗╔═╗╔═╗╔═╗╔═╗╔═╗  ┌┐┌┌─┐┌┬┐┬┬  ┬┌─┐  ┬─┐┌─┐┌─┐┌─┐┬─┐┌┬┐┌─┌─┐─┐
diff --git a/lib/private/machines/sum-records.js b/lib/private/machines/sum-records.js
index 490077da3..742c63ce8 100644
--- a/lib/private/machines/sum-records.js
+++ b/lib/private/machines/sum-records.js
@@ -76,7 +76,7 @@ module.exports = {
       }
     ], { cursor: {} });
 
-    cursor.toArray(function aggregateCb(err, nativeResult) {
+    (function(iifeDone) { cursor.toArray().then(function(nativeResult) { iifeDone(null, nativeResult);}).catch(function(err) { iifeDone(err, null);});})(function aggregateCb(err, nativeResult) {
       if (err) { return exits.error(err); }
 
       var sum = 0;
diff --git a/lib/private/machines/update-records.js b/lib/private/machines/update-records.js
index d885a96b7..8b723ffc0 100644
--- a/lib/private/machines/update-records.js
+++ b/lib/private/machines/update-records.js
@@ -103,7 +103,7 @@ module.exports = {
       // console.log('mongoWhere:',mongoWhere);
       // console.log('typeof mongoWhere._id.$in[0]:',typeof mongoWhere._id.$in[0]);
       // console.log('projection:',projection);
-      mongoCollection.find(mongoWhere, projection).toArray(function findCb(err, nativeResult) {
+      (function(iifeDone) { mongoCollection.find(mongoWhere, projection).toArray().then(function(nativeResult) { iifeDone(undefined, nativeResult);}).catch(function(err) { iifeDone(err);});})(function findCb(err, nativeResult) {
         if (err) { return proceed(err); }
         return proceed(undefined, _.pluck(nativeResult, pkColumnName));
       });
@@ -126,7 +126,7 @@ module.exports = {
       //   console.log('- - - - - - -  - - -UPDATE: secondaryMongoWhere:',secondaryMongoWhere, { '$set': s3q.valuesToSet });
       // }
 
-      mongoCollection.updateMany(secondaryMongoWhere, { '$set': s3q.valuesToSet }, function updateManyCb(err) {
+      (function(iifeDone) { mongoCollection.updateMany(secondaryMongoWhere, { '$set': s3q.valuesToSet }).then(function() { iifeDone();}).catch(function(err) { iifeDone(err);});})(function updateManyCb(err) {
         if (err) {
           err = processNativeError(err);
           if (err.footprint && err.footprint.identity === 'notUnique') {
@@ -158,7 +158,7 @@ module.exports = {
 
 
         // Now re-fetch the now-updated records.
-        mongoCollection.find(secondaryMongoWhere).toArray(function (err, phRecords) {
+        (function(iifeDone) { mongoCollection.find(secondaryMongoWhere).toArray().then(function(phRecords) { iifeDone(undefined, phRecords);}).catch(function(err) { iifeDone(err);});})(function(err, phRecords) {
           if (err) { return exits.error(err); }
 
           //  ╔═╗╦═╗╔═╗╔═╗╔═╗╔═╗╔═╗  ┌┐┌┌─┐┌┬┐┬┬  ┬┌─┐  ┬─┐┌─┐┌─┐┌─┐┬─┐┌┬┐┌─┌─┐─┐
diff --git a/package.json b/package.json
index 112875582..13df7b50a 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "async": "3.2.4",
     "flaverr": "^1.10.0",
     "machine": "^15.2.2",
-    "mongodb": "3.7.3",
+    "mongodb": "6.3.0",
     "qs": "6.9.7"
   },
   "devDependencies": {
diff --git a/test/run-adapter-specific-tests.js b/test/run-adapter-specific-tests.js
index 557fb7d33..9133c356f 100644
--- a/test/run-adapter-specific-tests.js
+++ b/test/run-adapter-specific-tests.js
@@ -145,7 +145,7 @@ describe('dontUseObjectIds', function() {
     describe('Updating a single record', function() {
 
       it('should update the record correctly', function(done) {
-        models.user._adapter.datastores.test.manager.collection('user').insertOne({_id: 123, name: 'bob'}, function(err) {
+        (function(iifeDone) { models.user._adapter.datastores.test.manager.collection('user').insertOne({_id: 123, name: 'bob'}).then(function(){ iifeDone();}).catch(function(err){ iifeDone(err);});})(function(err) {
           if (err) {return done(err);}
           models.user.updateOne({id: 123}, {name: 'joe'}).exec(function(err, record) {
             if (err) {return done(err);}
@@ -164,7 +164,7 @@ describe('dontUseObjectIds', function() {
 
       it('should update the records correctly', function(done) {
 
-        models.user._adapter.datastores.test.manager.collection('user').insertMany([{_id: 123, name: 'sid'}, {_id: 555, name: 'nancy'}], function(err) {
+        (function(iifeDone) {models.user._adapter.datastores.test.manager.collection('user').insertMany([{_id: 123, name: 'sid'}, {_id: 555, name: 'nancy'}]).then(function() { iifeDone();}).catch(function(err) { iifeDone(err);});})(function(err) {
           if (err) {return done(err);}
           models.user.update({id: {'>': 0}}, {name: 'joe'}).exec(function(err, records) {
             if (err) {return done(err);}
@@ -185,7 +185,7 @@ describe('dontUseObjectIds', function() {
 
       it('should find a record w/ a numeric ID', function(done) {
 
-        models.user._adapter.datastores.test.manager.collection('user').insertOne({_id: 123, name: 'bob'}, function(err) {
+        (function(iifeDone) {models.user._adapter.datastores.test.manager.collection('user').insertOne({_id: 123, name: 'bob'}).then(function(){ iifeDone();}).catch(function(err) { iifeDone(err);});})(function(err) {
           if (err) {return done(err);}
           models.user.findOne({id: 123}).exec(function(err, record) {
             if (err) {return done(err);}
@@ -203,7 +203,7 @@ describe('dontUseObjectIds', function() {
 
       it('should find the records correctly', function(done) {
 
-        models.user._adapter.datastores.test.manager.collection('user').insertMany([{_id: 123, name: 'sid'}, {_id: 555, name: 'nancy'}], function(err) {
+        (function(iifeDone) {models.user._adapter.datastores.test.manager.collection('user').insertMany([{_id: 123, name: 'sid'}, {_id: 555, name: 'nancy'}]).then(function() { iifeDone();}).catch(function(err) { iifeDone(err);});})(function(err) {
           if (err) {return done(err);}
           models.user.find({id: {'>': 0}}).exec(function(err, records) {
             if (err) {return done(err);}
@@ -222,11 +222,11 @@ describe('dontUseObjectIds', function() {
     describe('Deleting a single record', function() {
 
       it('should delete the record correctly', function(done) {
-        models.user._adapter.datastores.test.manager.collection('user').insertOne({_id: 123, name: 'bob'}, function(err) {
+        (function(iifeDone) {models.user._adapter.datastores.test.manager.collection('user').insertOne({_id: 123, name: 'bob'}).then(function() { iifeDone();}).catch(function(err) { iifeDone(err);});})(function(err) {
           if (err) {return done(err);}
           models.user.destroy({id: 123}).exec(function(err) {
             if (err) {return done(err);}
-            models.user._adapter.datastores.test.manager.collection('user').find({}).toArray(function(err, records) {
+            (function(iifeDone) { models.user._adapter.datastores.test.manager.collection('user').find({}).toArray().then(function(records) { iifeDone(undefined, records);}).catch(function(err) { iifeDone(err);});})(function(err, records) {
               if (err) {return done(err);}
               assert.equal(records.length, 0);
               return done();
@@ -244,11 +244,11 @@ describe('dontUseObjectIds', function() {
 
       it('should delete the records correctly', function(done) {
 
-        models.user._adapter.datastores.test.manager.collection('user').insertMany([{_id: 123, name: 'sid'}, {_id: 555, name: 'nancy'}], function(err) {
+        (function(iifeDone) { models.user._adapter.datastores.test.manager.collection('user').insertMany([{_id: 123, name: 'sid'}, {_id: 555, name: 'nancy'}]).then(function() { iifeDone();}).catch(function(err) { iifeDone(err);});})(function(err) {
           if (err) {return done(err);}
           models.user.destroy({id: {'>': 0}}).exec(function(err) {
             if (err) {return done(err);}
-            models.user._adapter.datastores.test.manager.collection('user').find({}).toArray(function(err, records) {
+            (function(iifeDone) { models.user._adapter.datastores.test.manager.collection('user').find({}).toArray().then(function(records) { iifeDone(undefined, records);}).catch(function(err) { iifeDone(err);});})(function(err, records) {
               if (err) {return done(err);}
               assert.equal(records.length, 0);
               return done();