diff --git a/package-lock.json b/package-lock.json
index 3b2093660..136ac6acf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -26,7 +26,6 @@
         "chai": "^4.3.7",
         "is-circular": "^1.0.2",
         "mocha": "^10.2.0",
-        "mockery": "^2.1.0",
         "semantic-release": "^21.0.1",
         "sinon": "^15.0.4",
         "sinon-chai": "^3.7.0"
@@ -4956,12 +4955,6 @@
       "integrity": "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==",
       "dev": true
     },
-    "node_modules/mockery": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/mockery/-/mockery-2.1.0.tgz",
-      "integrity": "sha512-9VkOmxKlWXoDO/h1jDZaS4lH33aWfRiJiNT/tKj+8OGzrcFDLo8d0syGdbsc3Bc4GvRXPb+NMMvojotmuGJTvA==",
-      "dev": true
-    },
     "node_modules/modify-values": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/modify-values/-/modify-values-1.0.1.tgz",
@@ -14808,12 +14801,6 @@
         }
       }
     },
-    "mockery": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/mockery/-/mockery-2.1.0.tgz",
-      "integrity": "sha512-9VkOmxKlWXoDO/h1jDZaS4lH33aWfRiJiNT/tKj+8OGzrcFDLo8d0syGdbsc3Bc4GvRXPb+NMMvojotmuGJTvA==",
-      "dev": true
-    },
     "modify-values": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/modify-values/-/modify-values-1.0.1.tgz",
diff --git a/package.json b/package.json
index dd3829713..425c09525 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,6 @@
     "chai": "^4.3.7",
     "is-circular": "^1.0.2",
     "mocha": "^10.2.0",
-    "mockery": "^2.1.0",
     "semantic-release": "^21.0.1",
     "sinon": "^15.0.4",
     "sinon-chai": "^3.7.0"
diff --git a/test/es2015_test.js b/test/es2015_test.js
index 5b281a9fe..2aca712c1 100644
--- a/test/es2015_test.js
+++ b/test/es2015_test.js
@@ -7,7 +7,7 @@
 const chai = require('chai')
 const sinon = require('sinon')
 chai.use(require('sinon-chai'))
-const mockery = require('mockery')
+const { hook, reset } = require('./fixtures/RequireMocker.js')
 
 const expect = chai.expect
 
@@ -53,19 +53,14 @@ describe('hubot/es2015', function () {
   })
 
   it('exports Robot class', async function () {
-    mockery.enable({
-      warnOnReplace: false,
-      warnOnUnregistered: false
-    })
-    mockery.registerMock('hubot-mock-adapter', require('./fixtures/mock-adapter.js'))
+    hook('hubot-mock-adapter', require('./fixtures/mock-adapter.js'))
 
     class MyRobot extends Robot {}
     const robot = new MyRobot('hubot-mock-adapter', false, 'TestHubot')
     await robot.loadAdapter()
     expect(robot).to.be.an.instanceof(Robot)
     expect(robot.name).to.equal('TestHubot')
-
-    mockery.disable()
+    reset()
   })
 
   it('exports Adapter class', function () {
diff --git a/test/fixtures/RequireMocker.js b/test/fixtures/RequireMocker.js
new file mode 100644
index 000000000..291d1d3b9
--- /dev/null
+++ b/test/fixtures/RequireMocker.js
@@ -0,0 +1,19 @@
+const Module = require('module')
+const originalRequire = Module.prototype.require
+const hookModuleToReturnMockFromRequire = (module, mock) => {
+  Module.prototype.require = function () {
+    if (arguments[0] === module) {
+      return mock
+    }
+    return originalRequire.apply(this, arguments)
+  }
+}
+
+const resetModuleMocks = () => {
+  Module.prototype.require = originalRequire
+}
+
+module.exports = {
+  hook: hookModuleToReturnMockFromRequire,
+  reset: resetModuleMocks
+}
diff --git a/test/middleware_test.js b/test/middleware_test.js
index eab7929cb..d3951fa08 100644
--- a/test/middleware_test.js
+++ b/test/middleware_test.js
@@ -16,8 +16,7 @@ const TextMessage = require('../src/message').TextMessage
 const Response = require('../src/response')
 const Middleware = require('../src/middleware')
 
-// mock `hubot-mock-adapter` module from fixture
-const mockery = require('mockery')
+const { hook, reset } = require('./fixtures/RequireMocker.js')
 
 describe('Middleware', function () {
   describe('Unit Tests', function () {
@@ -346,11 +345,7 @@ describe('Middleware', function () {
   // tested for.
   describe('Public Middleware APIs', function () {
     beforeEach(async function () {
-      mockery.enable({
-        warnOnReplace: false,
-        warnOnUnregistered: false
-      })
-      mockery.registerMock('hubot-mock-adapter', require('./fixtures/mock-adapter.js'))
+      hook('hubot-mock-adapter', require('./fixtures/mock-adapter.js'))
       process.env.EXPRESS_PORT = 0
       this.robot = new Robot('hubot-mock-adapter', true, 'TestHubot')
       await this.robot.loadAdapter()
@@ -379,7 +374,7 @@ describe('Middleware', function () {
     })
 
     afterEach(function () {
-      mockery.disable()
+      reset()
       this.robot.shutdown()
     })
 
diff --git a/test/robot_test.js b/test/robot_test.js
index 606708f18..e7d6f27fb 100644
--- a/test/robot_test.js
+++ b/test/robot_test.js
@@ -18,17 +18,12 @@ const LeaveMessage = require('../src/message').LeaveMessage
 const TextMessage = require('../src/message').TextMessage
 const TopicMessage = require('../src/message').TopicMessage
 
-// mock `hubot-mock-adapter` module from fixture
-const mockery = require('mockery')
 const path = require('path')
+const { hook, reset } = require('./fixtures/RequireMocker.js')
 
 describe('Robot', function () {
   beforeEach(async function () {
-    mockery.enable({
-      warnOnReplace: false,
-      warnOnUnregistered: false
-    })
-    mockery.registerMock('hubot-mock-adapter', require('./fixtures/mock-adapter.js'))
+    hook('hubot-mock-adapter', require('./fixtures/mock-adapter.js'))
     process.env.EXPRESS_PORT = 0
     this.robot = new Robot('hubot-mock-adapter', true, 'TestHubot')
     this.robot.alias = 'Hubot'
@@ -51,7 +46,7 @@ describe('Robot', function () {
   })
 
   afterEach(function () {
-    mockery.disable()
+    reset()
     this.robot.shutdown()
   })