diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4479c3b32e90..e959714fd3dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@
 - `[jest-circus, jest-jasmine2]` Fix error messages for Node's `assert.throes` ([#13322](https://github.com/facebook/jest/pull/13322))
 - `[jest-haste-map]` Remove `__proto__` usage ([#13256](https://github.com/facebook/jest/pull/13256))
 - `[jest-mock]` Improve `spyOn` typings to handle optional properties ([#13247](https://github.com/facebook/jest/pull/13247))
+- `[jest-mock]` Fix mocking of getters and setters on classes ([#13145](https://github.com/facebook/jest/pull/13145))
 - `[jest-snapshot]` Throw useful error when an array is passed as property matchers ([#13263](https://github.com/facebook/jest/pull/13263))
 - `[jest-snapshot]` Prioritize parser used in the project ([#13323](https://github.com/facebook/jest/pull/13323))
 - `[jest-transform]` Attempt to work around issues with atomic writes on Windows ([#11423](https://github.com/facebook/jest/pull/11423))
diff --git a/jest.config.mjs b/jest.config.mjs
index 192ccd07dcfa..5459b96db2b2 100644
--- a/jest.config.mjs
+++ b/jest.config.mjs
@@ -58,6 +58,9 @@ export default {
     '/packages/jest-haste-map/src/__tests__/haste_impl.js',
     '/packages/jest-haste-map/src/__tests__/dependencyExtractor.js',
     '/packages/jest-haste-map/src/__tests__/test_dotfiles_root/',
+    '/packages/jest-mock/src/__tests__/class-mocks-types.ts',
+    '/packages/jest-mock/src/__tests__/TestClass.ts',
+    '/packages/jest-mock/src/__tests__/SuperTestClass.ts',
     '/packages/jest-repl/src/__tests__/test_root',
     '/packages/jest-resolve-dependencies/src/__tests__/__fixtures__/',
     '/packages/jest-runtime/src/__tests__/defaultResolver.js',
diff --git a/packages/jest-mock/src/__tests__/SuperTestClass.ts b/packages/jest-mock/src/__tests__/SuperTestClass.ts
new file mode 100644
index 000000000000..ae1c262e34f6
--- /dev/null
+++ b/packages/jest-mock/src/__tests__/SuperTestClass.ts
@@ -0,0 +1,36 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+export class SuperTestClass {
+  static staticTestProperty = 'staticTestProperty';
+
+  static get staticTestAccessor(): string {
+    return 'staticTestAccessor';
+  }
+
+  static set staticTestAccessor(_x: string) {
+    return;
+  }
+
+  static staticTestMethod(): string {
+    return 'staticTestMethod';
+  }
+
+  testProperty = 'testProperty';
+
+  get testAccessor(): string {
+    return 'testAccessor';
+  }
+  set testAccessor(_x: string) {
+    return;
+  }
+
+  testMethod(): string {
+    return 'testMethod';
+  }
+}
diff --git a/packages/jest-mock/src/__tests__/TestClass.ts b/packages/jest-mock/src/__tests__/TestClass.ts
new file mode 100644
index 000000000000..e4197db98abe
--- /dev/null
+++ b/packages/jest-mock/src/__tests__/TestClass.ts
@@ -0,0 +1,11 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+import {SuperTestClass} from './SuperTestClass';
+
+export default class TestClass extends SuperTestClass {}
diff --git a/packages/jest-mock/src/__tests__/class-mocks-dual-import.test.ts b/packages/jest-mock/src/__tests__/class-mocks-dual-import.test.ts
new file mode 100644
index 000000000000..510484d06700
--- /dev/null
+++ b/packages/jest-mock/src/__tests__/class-mocks-dual-import.test.ts
@@ -0,0 +1,130 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+import {SuperTestClass} from './SuperTestClass';
+import TestClass from './TestClass';
+jest.mock('./SuperTestClass');
+jest.mock('./TestClass');
+
+describe('Testing the mocking of a class hierarchy defined in multiple imports', () => {
+  it('can call an instance method - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(SuperTestClass.prototype, 'testMethod')
+      .mockImplementation(() => {
+        return 'mockTestMethod';
+      });
+    const testClassInstance = new SuperTestClass();
+    expect(testClassInstance.testMethod()).toEqual('mockTestMethod');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+
+    mockTestMethod.mockClear();
+  });
+
+  it('can call a superclass instance method - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(TestClass.prototype, 'testMethod')
+      .mockImplementation(() => {
+        return 'mockTestMethod';
+      });
+    const testClassInstance = new TestClass();
+    expect(testClassInstance.testMethod()).toEqual('mockTestMethod');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can read a value from an instance getter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(SuperTestClass.prototype, 'testAccessor', 'get')
+      .mockImplementation(() => {
+        return 'mockTestAccessor';
+      });
+    const testClassInstance = new SuperTestClass();
+    expect(testClassInstance.testAccessor).toEqual('mockTestAccessor');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+
+    mockTestMethod.mockClear();
+  });
+
+  it('can read a value from a superclass instance getter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(TestClass.prototype, 'testAccessor', 'get')
+      .mockImplementation(() => {
+        return 'mockTestAccessor';
+      });
+    const testClassInstance = new TestClass();
+    expect(testClassInstance.testAccessor).toEqual('mockTestAccessor');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can write a value to an instance setter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(SuperTestClass.prototype, 'testAccessor', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    const testClassInstance = new SuperTestClass();
+    testClassInstance.testAccessor = '';
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+
+    mockTestMethod.mockClear();
+  });
+
+  it('can write a value to a superclass instance setter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(TestClass.prototype, 'testAccessor', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    const testClassInstance = new TestClass();
+    testClassInstance.testAccessor = '';
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can read a value from a static getter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(SuperTestClass, 'staticTestAccessor', 'get')
+      .mockImplementation(() => {
+        return 'mockStaticTestAccessor';
+      });
+    expect(SuperTestClass.staticTestAccessor).toEqual('mockStaticTestAccessor');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+
+    mockTestMethod.mockClear();
+  });
+
+  it('can read a value from a superclass static getter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(TestClass, 'staticTestAccessor', 'get')
+      .mockImplementation(() => {
+        return 'mockStaticTestAccessor';
+      });
+    expect(TestClass.staticTestAccessor).toEqual('mockStaticTestAccessor');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can write a value to a static setter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(SuperTestClass, 'staticTestAccessor', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    SuperTestClass.staticTestAccessor = '';
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+
+    mockTestMethod.mockClear();
+  });
+
+  it('can write a value to a superclass static setter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(TestClass, 'staticTestAccessor', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    TestClass.staticTestAccessor = '';
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+  });
+});
diff --git a/packages/jest-mock/src/__tests__/class-mocks-single-import.test.ts b/packages/jest-mock/src/__tests__/class-mocks-single-import.test.ts
new file mode 100644
index 000000000000..2b326b971ea5
--- /dev/null
+++ b/packages/jest-mock/src/__tests__/class-mocks-single-import.test.ts
@@ -0,0 +1,128 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+import SuperTestClass, {TestClass} from './class-mocks-types';
+jest.mock('./class-mocks-types');
+
+describe('Testing the mocking of a class hierarchy defined in a single import', () => {
+  it('can call an instance method - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(SuperTestClass.prototype, 'testMethod')
+      .mockImplementation(() => {
+        return 'mockTestMethod';
+      });
+    const testClassInstance = new SuperTestClass();
+    expect(testClassInstance.testMethod()).toEqual('mockTestMethod');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+
+    mockTestMethod.mockClear();
+  });
+
+  it('can call a superclass instance method - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(TestClass.prototype, 'testMethod')
+      .mockImplementation(() => {
+        return 'mockTestMethod';
+      });
+    const testClassInstance = new TestClass();
+    expect(testClassInstance.testMethod()).toEqual('mockTestMethod');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can read a value from an instance getter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(SuperTestClass.prototype, 'testAccessor', 'get')
+      .mockImplementation(() => {
+        return 'mockTestAccessor';
+      });
+    const testClassInstance = new SuperTestClass();
+    expect(testClassInstance.testAccessor).toEqual('mockTestAccessor');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+
+    mockTestMethod.mockClear();
+  });
+
+  it('can read a value from a superclass instance getter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(TestClass.prototype, 'testAccessor', 'get')
+      .mockImplementation(() => {
+        return 'mockTestAccessor';
+      });
+    const testClassInstance = new TestClass();
+    expect(testClassInstance.testAccessor).toEqual('mockTestAccessor');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can write a value to an instance setter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(SuperTestClass.prototype, 'testAccessor', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    const testClassInstance = new SuperTestClass();
+    testClassInstance.testAccessor = '';
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+
+    mockTestMethod.mockClear();
+  });
+
+  it('can write a value to a superclass instance setter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(TestClass.prototype, 'testAccessor', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    const testClassInstance = new TestClass();
+    testClassInstance.testAccessor = '';
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can read a value from a static getter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(SuperTestClass, 'staticTestAccessor', 'get')
+      .mockImplementation(() => {
+        return 'mockStaticTestAccessor';
+      });
+    expect(SuperTestClass.staticTestAccessor).toEqual('mockStaticTestAccessor');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+
+    mockTestMethod.mockClear();
+  });
+
+  it('can read a value from a superclass static getter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(TestClass, 'staticTestAccessor', 'get')
+      .mockImplementation(() => {
+        return 'mockStaticTestAccessor';
+      });
+    expect(TestClass.staticTestAccessor).toEqual('mockStaticTestAccessor');
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can write a value to a static setter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(SuperTestClass, 'staticTestAccessor', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    SuperTestClass.staticTestAccessor = '';
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+
+    mockTestMethod.mockClear();
+  });
+
+  it('can write a value to a superclass static setter - Auto-mocked class', () => {
+    const mockTestMethod = jest
+      .spyOn(TestClass, 'staticTestAccessor', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    TestClass.staticTestAccessor = '';
+    expect(mockTestMethod).toHaveBeenCalledTimes(1);
+  });
+});
diff --git a/packages/jest-mock/src/__tests__/class-mocks-types.ts b/packages/jest-mock/src/__tests__/class-mocks-types.ts
new file mode 100644
index 000000000000..4e277903940f
--- /dev/null
+++ b/packages/jest-mock/src/__tests__/class-mocks-types.ts
@@ -0,0 +1,38 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+export default class SuperTestClass {
+  static staticTestProperty = 'staticTestProperty';
+
+  static get staticTestAccessor(): string {
+    return 'staticTestAccessor';
+  }
+
+  static set staticTestAccessor(_x: string) {
+    return;
+  }
+
+  static staticTestMethod(): string {
+    return 'staticTestMethod';
+  }
+
+  testProperty = 'testProperty';
+
+  get testAccessor(): string {
+    return 'testAccessor';
+  }
+  set testAccessor(_x: string) {
+    return;
+  }
+
+  testMethod(): string {
+    return 'testMethod';
+  }
+}
+
+export class TestClass extends SuperTestClass {}
diff --git a/packages/jest-mock/src/__tests__/class-mocks.test.ts b/packages/jest-mock/src/__tests__/class-mocks.test.ts
new file mode 100644
index 000000000000..a0120958b54b
--- /dev/null
+++ b/packages/jest-mock/src/__tests__/class-mocks.test.ts
@@ -0,0 +1,175 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
+
+describe('Testing the mocking of a class', () => {
+  it('can call an instance method', () => {
+    class TestClass {
+      testMethod(): string {
+        return 'testMethod';
+      }
+    }
+
+    jest.spyOn(TestClass.prototype, 'testMethod').mockImplementation(() => {
+      return 'mockTestMethod';
+    });
+    const testClassInstance = new TestClass();
+    expect(testClassInstance.testMethod()).toEqual('mockTestMethod');
+  });
+
+  it('can call a superclass instance method', () => {
+    class SuperTestClass {
+      testMethod(): string {
+        return 'testMethod';
+      }
+    }
+
+    class TestClass extends SuperTestClass {}
+
+    jest.spyOn(TestClass.prototype, 'testMethod').mockImplementation(() => {
+      return 'mockTestMethod';
+    });
+    const testClassInstance = new TestClass();
+    expect(testClassInstance.testMethod()).toEqual('mockTestMethod');
+  });
+
+  it('can read a value from an instance getter', () => {
+    class TestClass {
+      get testMethod(): string {
+        return 'testMethod';
+      }
+    }
+
+    jest
+      .spyOn(TestClass.prototype, 'testMethod', 'get')
+      .mockImplementation(() => {
+        return 'mockTestMethod';
+      });
+    const testClassInstance = new TestClass();
+    expect(testClassInstance.testMethod).toEqual('mockTestMethod');
+  });
+
+  it('can read a value from an superclass instance getter', () => {
+    class SuperTestClass {
+      get testMethod(): string {
+        return 'testMethod';
+      }
+    }
+
+    class TestClass extends SuperTestClass {}
+
+    jest
+      .spyOn(TestClass.prototype, 'testMethod', 'get')
+      .mockImplementation(() => {
+        return 'mockTestMethod';
+      });
+    const testClassInstance = new TestClass();
+    expect(testClassInstance.testMethod).toEqual('mockTestMethod');
+  });
+
+  it('can write a value to an instance setter', () => {
+    class TestClass {
+      // eslint-disable-next-line accessor-pairs
+      set testMethod(_x: string) {
+        return;
+      }
+    }
+
+    const mocktestMethod = jest
+      .spyOn(TestClass.prototype, 'testMethod', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    const testClassInstance = new TestClass();
+    testClassInstance.testMethod = '';
+    expect(mocktestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can write a value to a superclass instance setter', () => {
+    class SuperTestClass {
+      // eslint-disable-next-line accessor-pairs
+      set testMethod(_x: string) {
+        return;
+      }
+    }
+
+    class TestClass extends SuperTestClass {}
+
+    const mocktestMethod = jest
+      .spyOn(TestClass.prototype, 'testMethod', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    const testClassInstance = new TestClass();
+    testClassInstance.testMethod = '';
+    expect(mocktestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can read a value from a static getter', () => {
+    class TestClass {
+      static get testMethod(): string {
+        return 'testMethod';
+      }
+    }
+
+    jest.spyOn(TestClass, 'testMethod', 'get').mockImplementation(() => {
+      return 'mockTestMethod';
+    });
+    expect(TestClass.testMethod).toEqual('mockTestMethod');
+  });
+
+  it('can read a value from a superclass static getter', () => {
+    class SuperTestClass {
+      static get testMethod(): string {
+        return 'testMethod';
+      }
+    }
+
+    class TestClass extends SuperTestClass {}
+
+    jest.spyOn(TestClass, 'testMethod', 'get').mockImplementation(() => {
+      return 'mockTestMethod';
+    });
+    expect(TestClass.testMethod).toEqual('mockTestMethod');
+  });
+
+  it('can write a value to a static setter', () => {
+    class TestClass {
+      // eslint-disable-next-line accessor-pairs
+      static set testMethod(_x: string) {
+        return;
+      }
+    }
+
+    const mocktestMethod = jest
+      .spyOn(TestClass, 'testMethod', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    TestClass.testMethod = '';
+    expect(mocktestMethod).toHaveBeenCalledTimes(1);
+  });
+
+  it('can write a value to a superclass static setter', () => {
+    class SuperTestClass {
+      // eslint-disable-next-line accessor-pairs
+      static set testMethod(_x: string) {
+        return;
+      }
+    }
+
+    class TestClass extends SuperTestClass {}
+
+    const mocktestMethod = jest
+      .spyOn(TestClass, 'testMethod', 'set')
+      .mockImplementation((_x: string) => {
+        return () => {};
+      });
+    TestClass.testMethod = '';
+    expect(mocktestMethod).toHaveBeenCalledTimes(1);
+  });
+});
diff --git a/packages/jest-mock/src/__tests__/index.test.ts b/packages/jest-mock/src/__tests__/index.test.ts
index 27f7ba18369c..06aba93300ee 100644
--- a/packages/jest-mock/src/__tests__/index.test.ts
+++ b/packages/jest-mock/src/__tests__/index.test.ts
@@ -1320,7 +1320,7 @@ describe('moduleMocker', () => {
         },
       };
 
-      const spy = moduleMocker.spyOn(obj, 'method');
+      const spy = moduleMocker.spyOn(obj, 'method', 'get');
 
       const thisArg = {this: true};
       const firstArg = {first: true};
diff --git a/packages/jest-mock/src/index.ts b/packages/jest-mock/src/index.ts
index b727d18e749f..117be1f3cbe5 100644
--- a/packages/jest-mock/src/index.ts
+++ b/packages/jest-mock/src/index.ts
@@ -516,7 +516,10 @@ export class ModuleMocker {
 
         if (!isReadonlyProp(object, prop)) {
           const propDesc = Object.getOwnPropertyDescriptor(object, prop);
-          if ((propDesc !== undefined && !propDesc.get) || object.__esModule) {
+          if (
+            propDesc !== undefined &&
+            !(propDesc.get && prop == '__proto__')
+          ) {
             slots.add(prop);
           }
         }
@@ -906,7 +909,9 @@ export class ModuleMocker {
     }
 
     this._getSlots(metadata.members).forEach(slot => {
+      let slotMock: Mocked<T>;
       const slotMetadata = (metadata.members && metadata.members[slot]) || {};
+
       if (slotMetadata.ref != null) {
         callbacks.push(
           (function (ref) {
@@ -914,7 +919,37 @@ export class ModuleMocker {
           })(slotMetadata.ref),
         );
       } else {
-        mock[slot] = this._generateMock(slotMetadata, callbacks, refs);
+        slotMock = this._generateMock(slotMetadata, callbacks, refs);
+
+        // For superclass accessor properties the subclass metadata contains the definitions
+        // for the getter and setter methods, and the superclass refs to them.
+        // The mock implementations are not available until the callbacks have been executed.
+        // Missing getter and setter refs will be resolved as their callbacks have been
+        // stacked before the setting of the accessor definition is stacked.
+        if (
+          slotMetadata.members?.get?.ref !== undefined ||
+          slotMetadata.members?.set?.ref !== undefined
+        ) {
+          callbacks.push(
+            (function (ref) {
+              return () => Object.defineProperty(mock, slot, ref);
+            })(slotMock as PropertyDescriptor),
+          );
+        } else if (
+          (slotMetadata.members?.get || slotMetadata.members?.set) &&
+          slotMetadata.members?.configurable &&
+          slotMetadata.members?.enumerable
+        ) {
+          // In some cases, e.g. third-party APIs, a 'prototype' ancestor to be
+          // mocked has a function property called 'get'.  In this circumstance
+          // the 'prototype' property cannot be redefined and doing so causes an
+          // exception. Checks have been added for the 'configurable' and
+          // 'enumberable' properties present on true accessor property
+          // descriptors to prevent the attempt to replace the API.
+          Object.defineProperty(mock, slot, slotMock as PropertyDescriptor);
+        } else {
+          mock[slot] = slotMock;
+        }
       }
     });
 
@@ -998,8 +1033,33 @@ export class ModuleMocker {
         ) {
           return;
         }
-        // @ts-expect-error no index signature
-        const slotMetadata = this.getMetadata<T>(component[slot], refs);
+
+        let descriptor = Object.getOwnPropertyDescriptor(component, slot);
+        let proto = Object.getPrototypeOf(component);
+        while (!descriptor && proto !== null) {
+          descriptor = Object.getOwnPropertyDescriptor(proto, slot);
+          proto = Object.getPrototypeOf(proto);
+        }
+
+        let slotMetadata: MockMetadata<T> | null = null;
+        if (descriptor?.get || descriptor?.set) {
+          // Specific case required for mocking class definitions imported via modules.
+          // In this case the class definitions are stored in accessor properties.
+          // All getters were previously ignored except where the containing object had __esModule == true
+          // Now getters are mocked the class definitions must still be read.
+          // @ts-expect-error ignore type mismatch
+          if (component.__esModule) {
+            // @ts-expect-error no index signature
+            slotMetadata = this.getMetadata<T>(component[slot], refs);
+          } else {
+            // @ts-expect-error ignore type mismatch
+            slotMetadata = this.getMetadata<T>(descriptor, refs);
+          }
+        } else {
+          // @ts-expect-error no index signature
+          slotMetadata = this.getMetadata<T>(component[slot], refs);
+        }
+
         if (slotMetadata) {
           if (!members) {
             members = {};
@@ -1080,146 +1140,130 @@ export class ModuleMocker {
     methodKey: K,
     accessType?: 'get' | 'set',
   ) {
-    if (accessType) {
-      return this._spyOnProperty(object, methodKey, accessType);
-    }
-
-    if (typeof object !== 'object' && typeof object !== 'function') {
+    if (!object) {
       throw new Error(
-        `Cannot spyOn on a primitive value; ${this._typeOf(object)} given`,
+        `spyOn could not find an object to spy upon for ${String(methodKey)}`,
       );
     }
 
-    const original = object[methodKey];
-
-    if (!this.isMockFunction(original)) {
-      if (typeof original !== 'function') {
-        throw new Error(
-          `Cannot spy the ${String(
-            methodKey,
-          )} property because it is not a function; ${this._typeOf(
-            original,
-          )} given instead`,
-        );
-      }
-
-      const isMethodOwner = Object.prototype.hasOwnProperty.call(
-        object,
-        methodKey,
-      );
-
-      let descriptor = Object.getOwnPropertyDescriptor(object, methodKey);
-      let proto = Object.getPrototypeOf(object);
-
-      while (!descriptor && proto !== null) {
-        descriptor = Object.getOwnPropertyDescriptor(proto, methodKey);
-        proto = Object.getPrototypeOf(proto);
-      }
-
-      let mock: Mock;
-
-      if (descriptor && descriptor.get) {
-        const originalGet = descriptor.get;
-        mock = this._makeComponent({type: 'function'}, () => {
-          descriptor!.get = originalGet;
-          Object.defineProperty(object, methodKey, descriptor!);
-        });
-        descriptor.get = () => mock;
-        Object.defineProperty(object, methodKey, descriptor);
-      } else {
-        mock = this._makeComponent({type: 'function'}, () => {
-          if (isMethodOwner) {
-            object[methodKey] = original;
-          } else {
-            delete object[methodKey];
-          }
-        });
-        // @ts-expect-error overriding original method with a Mock
-        object[methodKey] = mock;
-      }
-
-      mock.mockImplementation(function (this: unknown) {
-        return original.apply(this, arguments);
-      });
+    if (!methodKey) {
+      throw new Error('No property name supplied');
     }
 
-    return object[methodKey];
-  }
-
-  private _spyOnProperty<T extends object, K extends PropertyLikeKeys<T>>(
-    obj: T,
-    propertyKey: K,
-    accessType: 'get' | 'set',
-  ): Mock<() => T> {
-    if (typeof obj !== 'object' && typeof obj !== 'function') {
-      throw new Error(
-        `Cannot spyOn on a primitive value; ${this._typeOf(obj)} given`,
-      );
+    if (accessType && accessType != 'get' && accessType != 'set') {
+      throw new Error('Invalid accessType supplied');
     }
 
-    if (!obj) {
+    if (typeof object !== 'object' && typeof object !== 'function') {
       throw new Error(
-        `spyOn could not find an object to spy upon for ${String(propertyKey)}`,
+        `Cannot spyOn on a primitive value; ${this._typeOf(object)} given`,
       );
     }
 
-    if (!propertyKey) {
-      throw new Error('No property name supplied');
-    }
-
-    let descriptor = Object.getOwnPropertyDescriptor(obj, propertyKey);
-    let proto = Object.getPrototypeOf(obj);
-
+    let descriptor = Object.getOwnPropertyDescriptor(object, methodKey);
+    let proto = Object.getPrototypeOf(object);
     while (!descriptor && proto !== null) {
-      descriptor = Object.getOwnPropertyDescriptor(proto, propertyKey);
+      descriptor = Object.getOwnPropertyDescriptor(proto, methodKey);
       proto = Object.getPrototypeOf(proto);
     }
-
     if (!descriptor) {
-      throw new Error(`${String(propertyKey)} property does not exist`);
+      throw new Error(`${String(methodKey)} property does not exist`);
     }
-
     if (!descriptor.configurable) {
-      throw new Error(`${String(propertyKey)} is not declared configurable`);
+      throw new Error(`${String(methodKey)} is not declared configurable`);
     }
 
-    if (!descriptor[accessType]) {
-      throw new Error(
-        `Property ${String(
-          propertyKey,
-        )} does not have access type ${accessType}`,
-      );
+    if (this.isMockFunction(descriptor.value)) {
+      return object[methodKey];
+    } else if (accessType == 'get' && this.isMockFunction(descriptor.get)) {
+      return descriptor.get;
+    } else if (accessType == 'set' && this.isMockFunction(descriptor.set)) {
+      return descriptor.set;
     }
 
-    const original = descriptor[accessType];
-
-    if (!this.isMockFunction(original)) {
-      if (typeof original !== 'function') {
+    if (accessType) {
+      if (typeof descriptor[accessType] !== 'function') {
         throw new Error(
-          `Cannot spy the ${String(
-            propertyKey,
-          )} property because it is not a function; ${this._typeOf(
-            original,
-          )} given instead`,
+          `Cannot spy the ${String(accessType)} ${String(
+            methodKey,
+          )} property because it is not a function;
+          ${this._typeOf(descriptor?.[accessType])} given instead`,
         );
       }
+    } else if (typeof descriptor.value !== 'function') {
+      throw new Error(
+        `Cannot spy the ${String(
+          methodKey,
+        )} property because it is not a function; ${this._typeOf(
+          descriptor.value,
+        )} given instead`,
+      );
+    }
+
+    let mock: Mock;
 
-      descriptor[accessType] = this._makeComponent({type: 'function'}, () => {
-        // @ts-expect-error: mock is assignable
-        descriptor![accessType] = original;
-        Object.defineProperty(obj, propertyKey, descriptor!);
+    if (accessType == 'get' && descriptor['get']) {
+      const originalAccessor = descriptor['get'];
+      mock = this._makeComponent(
+        {
+          type: 'function',
+        },
+        () => {
+          descriptor![accessType] = originalAccessor;
+          Object.defineProperty(object, methodKey, descriptor!);
+        },
+      );
+
+      descriptor[accessType] = mock;
+      mock.mockImplementation(function (this: unknown) {
+        return originalAccessor.call(this);
       });
+      Object.defineProperty(object, methodKey, descriptor);
+    } else if (accessType == 'set' && descriptor['set']) {
+      const originalAccessor = descriptor['set'];
+      mock = this._makeComponent(
+        {
+          type: 'function',
+        },
+        () => {
+          descriptor![accessType] = originalAccessor;
+          Object.defineProperty(object, methodKey, descriptor!);
+        },
+      );
 
-      (descriptor[accessType] as Mock<() => T>).mockImplementation(function (
-        this: unknown,
-      ) {
-        // @ts-expect-error - wrong context
-        return original.apply(this, arguments);
+      descriptor[accessType] = mock;
+      mock.mockImplementation(function (this: unknown) {
+        return originalAccessor.call(this, arguments[0]);
+      });
+      Object.defineProperty(object, methodKey, descriptor);
+    } else {
+      const isMethodOwner = Object.prototype.hasOwnProperty.call(
+        object,
+        methodKey,
+      );
+      const original = descriptor;
+
+      mock = this._makeComponent(
+        {
+          type: 'function',
+        },
+        () => {
+          if (isMethodOwner) {
+            object[methodKey] = original.value;
+          } else {
+            delete object[methodKey];
+          }
+        },
+      );
+
+      // @ts-expect-error overriding original method with a Mock
+      object[methodKey] = mock;
+      mock.mockImplementation(function (this: unknown) {
+        return original.value.apply(this, arguments);
       });
     }
 
-    Object.defineProperty(obj, propertyKey, descriptor);
-    return descriptor[accessType] as Mock<() => T>;
+    return mock;
   }
 
   clearAllMocks(): void {