diff --git a/test/functional/buffering_proxy.test.js b/test/functional/buffering_proxy.test.js
index 8892f104967..5a54c23bb9a 100644
--- a/test/functional/buffering_proxy.test.js
+++ b/test/functional/buffering_proxy.test.js
@@ -35,7 +35,7 @@ describe.skip('Buffering Proxy', function () {
       var electionIds = [new ObjectId(0), new ObjectId(1)];
 
       // Default message fields
-      var defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER_36, {
+      var defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER, {
         setName: 'rs',
         setVersion: 1,
         electionId: electionIds[0],
@@ -252,7 +252,7 @@ describe.skip('Buffering Proxy', function () {
       var electionIds = [new ObjectId(0), new ObjectId(1)];
 
       // Default message fields
-      var defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER_36, {
+      var defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER, {
         setName: 'rs',
         setVersion: 1,
         electionId: electionIds[0],
diff --git a/test/functional/collations.test.js b/test/functional/collations.test.js
index 250fa73d5ff..fd237d3e79d 100644
--- a/test/functional/collations.test.js
+++ b/test/functional/collations.test.js
@@ -21,7 +21,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -57,7 +57,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -95,7 +95,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -131,7 +131,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -172,7 +172,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -208,7 +208,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -246,7 +246,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -282,7 +282,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -320,7 +320,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -356,7 +356,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -469,7 +469,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
@@ -624,7 +624,7 @@ describe('Collation', function () {
     test: function () {
       const configuration = this.configuration;
       const client = configuration.newClient(`mongodb://${testContext.server.uri()}/test`);
-      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER_36)];
+      const primary = [Object.assign({}, mock.DEFAULT_ISMASTER)];
 
       let commandResult;
       testContext.server.setMessageHandler(request => {
diff --git a/test/functional/command_write_concern.test.js b/test/functional/command_write_concern.test.js
index 26798199b63..adaab4ee4ae 100644
--- a/test/functional/command_write_concern.test.js
+++ b/test/functional/command_write_concern.test.js
@@ -11,7 +11,7 @@ class WriteConcernTest {
     this.configuration = configuration;
     this.responseDecoration = {};
     const electionIds = [new ObjectId(), new ObjectId()];
-    const defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER_36, {
+    const defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER, {
       setName: 'rs',
       setVersion: 1,
       electionId: electionIds[0],
diff --git a/test/functional/max_staleness.test.js b/test/functional/max_staleness.test.js
index b99825a6e5b..634819ece78 100644
--- a/test/functional/max_staleness.test.js
+++ b/test/functional/max_staleness.test.js
@@ -11,7 +11,7 @@ describe('Max Staleness', function () {
     return mock.createServer().then(server => {
       test.server = server;
 
-      const defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER_36, { msg: 'isdbgrid' });
+      const defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER, { msg: 'isdbgrid' });
 
       // Primary server states
       const serverIsMaster = [Object.assign({}, defaultFields)];
diff --git a/test/functional/replicaset_mock.test.js b/test/functional/replicaset_mock.test.js
index bda770fdb8c..8008650f6fe 100644
--- a/test/functional/replicaset_mock.test.js
+++ b/test/functional/replicaset_mock.test.js
@@ -9,12 +9,12 @@ describe('ReplSet (mocks)', function () {
   afterEach(() => mock.cleanup());
   beforeEach(() => {
     // Default message fields
-    const defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER_36, {
+    const defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER, {
       msg: 'isdbgrid'
     });
 
     // Default message fields
-    const defaultRSFields = Object.assign({}, mock.DEFAULT_ISMASTER_36, {
+    const defaultRSFields = Object.assign({}, mock.DEFAULT_ISMASTER, {
       setName: 'rs',
       setVersion: 1,
       electionId: new ObjectId(),
diff --git a/test/functional/unit-sessions/client.test.js b/test/functional/unit-sessions/client.test.js
index 863595c8ab2..6fae9d46c3f 100644
--- a/test/functional/unit-sessions/client.test.js
+++ b/test/functional/unit-sessions/client.test.js
@@ -116,7 +116,7 @@ describe('Sessions - client/unit', function () {
           var doc = request.document;
           if (doc.ismaster || doc.hello) {
             request.reply(
-              Object.assign({}, mock.DEFAULT_ISMASTER_36, {
+              Object.assign({}, mock.DEFAULT_ISMASTER, {
                 logicalSessionTimeoutMinutes: 10
               })
             );
diff --git a/test/functional/unit_db_list_collections.test.js b/test/functional/unit_db_list_collections.test.js
index 47a18e965fd..b1c1ca01239 100644
--- a/test/functional/unit_db_list_collections.test.js
+++ b/test/functional/unit_db_list_collections.test.js
@@ -71,6 +71,6 @@ describe('db.listCollections', function () {
       });
     }
 
-    it(config.description, { test: testFn, metadata: { requires: { mongodb: '>=3.6.0' } } });
+    it(config.description, { test: testFn, metadata: { requires: { mongodb: '>=2.7.6' } } });
   });
 });
diff --git a/test/functional/view.test.js b/test/functional/view.test.js
index 6f32ce94ba4..d29899e3a48 100644
--- a/test/functional/view.test.js
+++ b/test/functional/view.test.js
@@ -13,7 +13,7 @@ describe('Views', function () {
       const configuration = this.configuration;
 
       // Default message fields
-      var defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER_36);
+      var defaultFields = Object.assign({}, mock.DEFAULT_ISMASTER);
 
       // Primary server states
       var primary = [Object.assign({}, defaultFields)];
diff --git a/test/unit/_MISC_scram_iterations.test.js b/test/unit/_MISC_scram_iterations.test.js
index ae4d8806e62..c8d828fc147 100644
--- a/test/unit/_MISC_scram_iterations.test.js
+++ b/test/unit/_MISC_scram_iterations.test.js
@@ -81,7 +81,7 @@ describe('SCRAM Iterations Tests', function () {
     server.setMessageHandler(request => {
       const doc = request.document;
       if (doc.ismaster || doc.hello) {
-        return request.reply(Object.assign({}, mock.DEFAULT_ISMASTER_36));
+        return request.reply(Object.assign({}, mock.DEFAULT_ISMASTER));
       } else if (doc.saslStart) {
         return request.reply({
           ok: 1,
@@ -128,7 +128,7 @@ describe('SCRAM Iterations Tests', function () {
     server.setMessageHandler(request => {
       const doc = request.document;
       if (doc.ismaster || doc.hello) {
-        return request.reply(Object.assign({}, mock.DEFAULT_ISMASTER_36));
+        return request.reply(Object.assign({}, mock.DEFAULT_ISMASTER));
       } else if (doc.saslStart) {
         return request.reply({
           ok: 1,
diff --git a/test/unit/cursor/find_cursor.test.js b/test/unit/cursor/find_cursor.test.js
index 721798dd92f..406375464c8 100644
--- a/test/unit/cursor/find_cursor.test.js
+++ b/test/unit/cursor/find_cursor.test.js
@@ -31,7 +31,7 @@ describe('Find Cursor', function () {
           const doc = request.document;
           if (doc.ismaster || doc.hello) {
             request.reply(
-              Object.assign({}, mock.DEFAULT_ISMASTER_36, {
+              Object.assign({}, mock.DEFAULT_ISMASTER, {
                 maxWireVersion: 6
               })
             );