diff --git a/.github/workflow-scripts/__tests__/publishTemplate-test.js b/.github/workflow-scripts/__tests__/publishTemplate-test.js
index 9f735a633977..25734752cf4c 100644
--- a/.github/workflow-scripts/__tests__/publishTemplate-test.js
+++ b/.github/workflow-scripts/__tests__/publishTemplate-test.js
@@ -7,11 +7,6 @@
  * @format
  */
 
-const {
-  publishTemplate,
-  verifyPublishedTemplate,
-} = require('../publishTemplate');
-
 const mockRun = jest.fn();
 const mockSleep = jest.fn();
 const mockGetNpmPackageInfo = jest.fn();
@@ -29,6 +24,11 @@ jest.mock('../verifyPublishedPackage.js', () => ({
   verifyPublishedPackage: mockVerifyPublishedPackage,
 }));
 
+const {
+  publishTemplate,
+  verifyPublishedTemplate,
+} = require('../publishTemplate');
+
 const getMockGithub = () => ({
   rest: {
     actions: {
diff --git a/.github/workflow-scripts/__tests__/verifyArtifactsAreOnMaven-test.js b/.github/workflow-scripts/__tests__/verifyArtifactsAreOnMaven-test.js
index 8e9758f28609..2216b94d8543 100644
--- a/.github/workflow-scripts/__tests__/verifyArtifactsAreOnMaven-test.js
+++ b/.github/workflow-scripts/__tests__/verifyArtifactsAreOnMaven-test.js
@@ -7,8 +7,6 @@
  * @format
  */
 
-const {verifyArtifactsAreOnMaven} = require('../verifyArtifactsAreOnMaven');
-
 const mockSleep = jest.fn();
 const silence = () => {};
 const mockFetch = jest.fn();
@@ -19,6 +17,8 @@ jest.mock('../utils.js', () => ({
   sleep: mockSleep,
 }));
 
+const {verifyArtifactsAreOnMaven} = require('../verifyArtifactsAreOnMaven');
+
 process.exit = mockExit;
 global.fetch = mockFetch;
 
diff --git a/.github/workflow-scripts/__tests__/verifyPublishedPackage-test.js b/.github/workflow-scripts/__tests__/verifyPublishedPackage-test.js
index 95e22baa854e..78c19637e52e 100644
--- a/.github/workflow-scripts/__tests__/verifyPublishedPackage-test.js
+++ b/.github/workflow-scripts/__tests__/verifyPublishedPackage-test.js
@@ -7,8 +7,6 @@
  * @format
  */
 
-const {verifyPublishedPackage} = require('../verifyPublishedPackage');
-
 const mockRun = jest.fn();
 const mockSleep = jest.fn();
 const mockGetNpmPackageInfo = jest.fn();
@@ -23,6 +21,8 @@ jest.mock('../utils.js', () => ({
   getNpmPackageInfo: mockGetNpmPackageInfo,
 }));
 
+const {verifyPublishedPackage} = require('../verifyPublishedPackage');
+
 describe('#verifyPublishedPackage', () => {
   beforeEach(jest.clearAllMocks);
 
diff --git a/.github/workflow-scripts/__tests__/verifyReleaseOnNpm-test.js b/.github/workflow-scripts/__tests__/verifyReleaseOnNpm-test.js
index 761c4352b408..e55f126183b5 100644
--- a/.github/workflow-scripts/__tests__/verifyReleaseOnNpm-test.js
+++ b/.github/workflow-scripts/__tests__/verifyReleaseOnNpm-test.js
@@ -7,8 +7,6 @@
  * @format
  */
 
-const {verifyReleaseOnNpm} = require('../verifyReleaseOnNpm');
-
 const mockVerifyPublishedPackage = jest.fn();
 const silence = () => {};
 
@@ -21,6 +19,8 @@ jest.mock('../verifyPublishedPackage.js', () => ({
   verifyPublishedPackage: mockVerifyPublishedPackage,
 }));
 
+const {verifyReleaseOnNpm} = require('../verifyReleaseOnNpm');
+
 describe('#verifyReleaseOnNPM', () => {
   beforeEach(jest.clearAllMocks);
 
diff --git a/packages/react-native-codegen/src/parsers/__tests__/parsers-commons-test.js b/packages/react-native-codegen/src/parsers/__tests__/parsers-commons-test.js
index dad048f3be18..d85c5581c78a 100644
--- a/packages/react-native-codegen/src/parsers/__tests__/parsers-commons-test.js
+++ b/packages/react-native-codegen/src/parsers/__tests__/parsers-commons-test.js
@@ -10,11 +10,33 @@
 
 'use-strict';
 
+// The buildSchema tests spy on `getConfigType`, which parsers-commons reads when
+// it loads, so it's wrapped before any module that uses it is required.
+jest.mock('../utils', () => {
+  const actual = jest.requireActual<Utils>('../utils');
+  return {...actual, getConfigType: jest.fn(actual.getConfigType)};
+});
+
 import type {ParserType} from '../errors';
+import typeof * as Utils from '../utils';
 
-import {FlowParser} from '../flow/parser';
-import {MockedParser} from '../parserMock';
-import {
+const {
+  IncorrectModuleRegistryCallArgumentTypeParserError,
+  IncorrectModuleRegistryCallArityParserError,
+  MisnamedModuleInterfaceParserError,
+  ModuleInterfaceNotFoundParserError,
+  MoreThanOneModuleInterfaceParserError,
+  MoreThanOneModuleRegistryCallsParserError,
+  ParserError,
+  UnsupportedObjectPropertyTypeAnnotationParserError,
+  UntypedModuleRegistryCallParserError,
+  UnusedModuleInterfaceParserError,
+} = require('../errors');
+const {buildComponentSchema} = require('../flow/components');
+const {flowTranslateTypeAnnotation} = require('../flow/modules/index');
+const {FlowParser} = require('../flow/parser');
+const {MockedParser} = require('../parserMock');
+const {
   assertGenericTypeAnnotationHasExactlyOneTypeParameter,
   buildSchema,
   buildSchemaFromConfigType,
@@ -30,22 +52,7 @@ import {
   propertyNames,
   unwrapNullable,
   wrapNullable,
-} from '../parsers-commons';
-
-const {
-  IncorrectModuleRegistryCallArgumentTypeParserError,
-  IncorrectModuleRegistryCallArityParserError,
-  MisnamedModuleInterfaceParserError,
-  ModuleInterfaceNotFoundParserError,
-  MoreThanOneModuleInterfaceParserError,
-  MoreThanOneModuleRegistryCallsParserError,
-  ParserError,
-  UnsupportedObjectPropertyTypeAnnotationParserError,
-  UntypedModuleRegistryCallParserError,
-  UnusedModuleInterfaceParserError,
-} = require('../errors');
-const {buildComponentSchema} = require('../flow/components');
-const {flowTranslateTypeAnnotation} = require('../flow/modules/index');
+} = require('../parsers-commons');
 const {buildModuleSchema} = require('../parsers-commons.js');
 const {Visitor} = require('../parsers-primitives');
 const {wrapComponentSchema} = require('../schema.js');
@@ -665,7 +672,7 @@ describe('buildSchemaFromConfigType', () => {
 });
 
 describe('buildSchema', () => {
-  const getConfigTypeSpy = jest.spyOn(require('../utils'), 'getConfigType');
+  const getConfigTypeSpy = require('../utils').getConfigType;
 
   describe('when there is no codegenNativeComponent and no TurboModule', () => {
     const contents = '';
diff --git a/packages/react-native/Libraries/Animated/__tests__/Animated-test.js b/packages/react-native/Libraries/Animated/__tests__/Animated-test.js
index 3d4b8c70fdc7..8e7aa3f02c5a 100644
--- a/packages/react-native/Libraries/Animated/__tests__/Animated-test.js
+++ b/packages/react-native/Libraries/Animated/__tests__/Animated-test.js
@@ -12,13 +12,13 @@ import * as React from 'react';
 
 const {PlatformColor} = require('../../StyleSheet/PlatformColorValueTypes');
 let Animated = require('../Animated').default;
-const AnimatedProps = require('../nodes/AnimatedProps').default;
-const {
+let AnimatedProps = require('../nodes/AnimatedProps').default;
+let {
   create,
   unmount,
   update,
 } = require('@react-native/jest-preset/jest/renderer');
-const TestRenderer = require('react-test-renderer');
+let TestRenderer = require('react-test-renderer');
 
 // WORKAROUND: `jest.runAllTicks` skips tasks scheduled w/ `queueMicrotask`.
 function mockQueueMicrotask() {
@@ -37,6 +37,16 @@ function mockQueueMicrotask() {
 describe('Animated', () => {
   beforeEach(() => {
     jest.resetModules();
+    // Reload after the reset, so that Animated and the renderer share a copy
+    // of React.
+    Animated = require('../Animated').default;
+    AnimatedProps = require('../nodes/AnimatedProps').default;
+    ({
+      create,
+      unmount,
+      update,
+    } = require('@react-native/jest-preset/jest/renderer'));
+    TestRenderer = require('react-test-renderer');
   });
 
   mockQueueMicrotask();
diff --git a/packages/react-native/Libraries/LogBox/__tests__/LogBoxInspectorContainer-test.js b/packages/react-native/Libraries/LogBox/__tests__/LogBoxInspectorContainer-test.js
index 89a9366e1b59..cd1601713a05 100644
--- a/packages/react-native/Libraries/LogBox/__tests__/LogBoxInspectorContainer-test.js
+++ b/packages/react-native/Libraries/LogBox/__tests__/LogBoxInspectorContainer-test.js
@@ -10,15 +10,6 @@
 
 'use strict';
 
-const BackHandler: $FlowFixMe = require('../../Utilities/BackHandler').default;
-const LogBoxData = require('../Data/LogBoxData');
-const LogBoxLog = require('../Data/LogBoxLog').default;
-const {
-  _LogBoxInspectorContainer: LogBoxInspectorContainer,
-} = require('../LogBoxInspectorContainer');
-const render = require('@react-native/jest-preset/jest/renderer');
-const React = require('react');
-
 // Mock `LogBoxInspector` because we are interested in snapshotting the behavior
 // of `LogBoxInspectorContainer`, not `LogBoxInspector`.
 jest.mock('../UI/LogBoxInspector', () => ({
@@ -30,6 +21,15 @@ jest.mock('../../Utilities/BackHandler', () =>
   require('../../Utilities/__mocks__/BackHandler'),
 );
 
+const BackHandler: $FlowFixMe = require('../../Utilities/BackHandler').default;
+const LogBoxData = require('../Data/LogBoxData');
+const LogBoxLog = require('../Data/LogBoxLog').default;
+const {
+  _LogBoxInspectorContainer: LogBoxInspectorContainer,
+} = require('../LogBoxInspectorContainer');
+const render = require('@react-native/jest-preset/jest/renderer');
+const React = require('react');
+
 describe('LogBoxInspectorContainer', () => {
   let output;
 
diff --git a/packages/react-native/Libraries/LogBox/__tests__/LogBoxNotificationContainer-test.js b/packages/react-native/Libraries/LogBox/__tests__/LogBoxNotificationContainer-test.js
index 16d3292fa2bb..343331d4fb9e 100644
--- a/packages/react-native/Libraries/LogBox/__tests__/LogBoxNotificationContainer-test.js
+++ b/packages/react-native/Libraries/LogBox/__tests__/LogBoxNotificationContainer-test.js
@@ -10,13 +10,6 @@
 
 'use strict';
 
-const BackHandler: $FlowFixMe = require('../../Utilities/BackHandler').default;
-const LogBoxData = require('../Data/LogBoxData');
-const LogBoxLog = require('../Data/LogBoxLog').default;
-const {LogBoxNotificationContainer} = require('../LogBoxNotificationContainer');
-const render = require('@react-native/jest-preset/jest/renderer');
-const React = require('react');
-
 // Mock `LogBoxLogNotification` because we are interested in snapshotting the
 // behavior of `LogBoxNotificationContainer`, not `LogBoxLogNotification`.
 jest.mock('../UI/LogBoxNotification', () => ({
@@ -28,6 +21,13 @@ jest.mock('../../Utilities/BackHandler', () =>
   require('../../Utilities/__mocks__/BackHandler'),
 );
 
+const BackHandler: $FlowFixMe = require('../../Utilities/BackHandler').default;
+const LogBoxData = require('../Data/LogBoxData');
+const LogBoxLog = require('../Data/LogBoxLog').default;
+const {LogBoxNotificationContainer} = require('../LogBoxNotificationContainer');
+const render = require('@react-native/jest-preset/jest/renderer');
+const React = require('react');
+
 describe('LogBoxNotificationContainer', () => {
   let output;
 
diff --git a/packages/react-native/scripts/ios-prebuild/__tests__/headers-xcframework-test.js b/packages/react-native/scripts/ios-prebuild/__tests__/headers-xcframework-test.js
index b9492192a081..7a902be56f2c 100644
--- a/packages/react-native/scripts/ios-prebuild/__tests__/headers-xcframework-test.js
+++ b/packages/react-native/scripts/ios-prebuild/__tests__/headers-xcframework-test.js
@@ -10,11 +10,18 @@
 
 'use strict';
 
+// headers-xcframework reads `execFileSync` when it loads, so it's mocked before
+// the module is required.
+const mockExecFileSync = jest.fn();
+jest.mock('node:child_process', () => ({
+  ...jest.requireActual('node:child_process'),
+  execFileSync: mockExecFileSync,
+}));
+
 const {
   buildDepsHeadersXcframework,
   stubSlicesFromXcframework,
 } = require('../headers-xcframework');
-const childProcess = require('node:child_process');
 const fs = require('node:fs');
 const os = require('node:os');
 const path = require('node:path');
@@ -67,9 +74,9 @@ describe('stubSlicesFromXcframework', () => {
   // SupportedPlatform/Variant -> key mapping and the unknown-slice guard can be
   // tested without a real xcframework or macOS tooling.
   const mockPlist = (obj /*: unknown */) =>
-    jest
-      .spyOn(childProcess, 'execFileSync')
-      .mockReturnValue(Buffer.from(JSON.stringify(obj) ?? '', 'utf8'));
+    mockExecFileSync.mockReturnValue(
+      Buffer.from(JSON.stringify(obj) ?? '', 'utf8'),
+    );
 
   afterEach(() => {
     jest.restoreAllMocks();
diff --git a/packages/react-native/scripts/swiftpm/__tests__/headers-utils-test.js b/packages/react-native/scripts/swiftpm/__tests__/headers-utils-test.js
index cd48b6bc063a..d9a4971ff4c2 100644
--- a/packages/react-native/scripts/swiftpm/__tests__/headers-utils-test.js
+++ b/packages/react-native/scripts/swiftpm/__tests__/headers-utils-test.js
@@ -10,6 +10,12 @@
 
 'use strict';
 
+// Mock all required modules
+jest.mock('../utils');
+jest.mock('../headers-mappings');
+jest.mock('node:fs');
+jest.mock('node:path');
+
 const {
   symlinkCodegenHeaders,
   symlinkHeadersFromPath,
@@ -18,12 +24,6 @@ const {
   symlinkThirdPartyDependenciesHeaders,
 } = require('../headers-utils');
 
-// Mock all required modules
-jest.mock('../utils');
-jest.mock('../headers-mappings');
-jest.mock('node:fs');
-jest.mock('node:path');
-
 describe('symlinkHeadersFromPath', () => {
   let mockUtils;
   let mockFs;
diff --git a/packages/react-native/scripts/swiftpm/__tests__/prepare-app-utils-test.js b/packages/react-native/scripts/swiftpm/__tests__/prepare-app-utils-test.js
index c4cb0f884101..285695a9f7e0 100644
--- a/packages/react-native/scripts/swiftpm/__tests__/prepare-app-utils-test.js
+++ b/packages/react-native/scripts/swiftpm/__tests__/prepare-app-utils-test.js
@@ -10,17 +10,6 @@
 
 'use strict';
 
-const {
-  configureAppForSwift,
-  createHardlinks,
-  findXcodeProjectDirectory,
-  generateCodegenArtifacts,
-  prepareHeaders,
-  runIosPrebuild,
-  runPodDeintegrate,
-  setBuildFromSource,
-} = require('../prepare-app-utils');
-
 // Mock child_process module
 jest.mock('node:child_process');
 
@@ -33,8 +22,11 @@ jest.mock('../headers-utils');
 // Mock prepare-app-dependencies-headers module
 jest.mock('../prepare-app-dependencies-headers');
 
-// Mock codegen executor module
-jest.mock('../../codegen/generate-artifacts-executor');
+// Mock codegen executor module. Automocking loads the real module, which reads
+// package.json through the mocked `fs`.
+jest.mock('../../codegen/generate-artifacts-executor', () => ({
+  execute: jest.fn(),
+}));
 
 // Mock path module for absolute paths
 jest.mock('node:path', () => {
@@ -46,6 +38,17 @@ jest.mock('node:path', () => {
   };
 });
 
+const {
+  configureAppForSwift,
+  createHardlinks,
+  findXcodeProjectDirectory,
+  generateCodegenArtifacts,
+  prepareHeaders,
+  runIosPrebuild,
+  runPodDeintegrate,
+  setBuildFromSource,
+} = require('../prepare-app-utils');
+
 describe('createHardlinks', () => {
   let mockSymlinkReactNativeHeaders;
   let mockSymlinkThirdPartyDependenciesHeaders;
diff --git a/scripts/releases-ci/__tests__/publish-npm-test.js b/scripts/releases-ci/__tests__/publish-npm-test.js
index de37e4c92939..83d788099a24 100644
--- a/scripts/releases-ci/__tests__/publish-npm-test.js
+++ b/scripts/releases-ci/__tests__/publish-npm-test.js
@@ -23,10 +23,16 @@ const getPackagesMock = jest.fn();
 const updateHermesVersionsToPrebuiltMock = jest.fn();
 const getBranchName = jest.fn();
 
+import type {BuildType} from '../../releases/utils/version-utils';
+
 const {REPO_ROOT} = require('../../shared/consts');
-const {publishNpm} = require('../publish-npm');
 const path = require('node:path');
 
+// Required on each call, so that publish-npm picks up the mocks and module
+// registry that each test sets up after this file loads.
+const publishNpm = (buildType: BuildType): Promise<void> =>
+  require('../publish-npm').publishNpm(buildType);
+
 let consoleLog;
 
 describe('publish-npm', () => {
diff --git a/scripts/releases-ci/__tests__/publish-updated-packages-test.js b/scripts/releases-ci/__tests__/publish-updated-packages-test.js
index 76e721789881..78275ec5ef93 100644
--- a/scripts/releases-ci/__tests__/publish-updated-packages-test.js
+++ b/scripts/releases-ci/__tests__/publish-updated-packages-test.js
@@ -8,11 +8,6 @@
  * @format
  */
 
-const {
-  getTagsFromCommitMessage,
-  publishUpdatedPackages,
-} = require('../publish-updated-packages');
-
 const getPackagesMock = jest.fn();
 const execSync = jest.fn();
 const execMock = jest.fn();
@@ -23,6 +18,11 @@ jest.mock('shelljs', () => ({exec: execMock}));
 jest.mock('../../shared/monorepoUtils', () => ({
   getPackages: getPackagesMock,
 }));
+
+const {
+  getTagsFromCommitMessage,
+  publishUpdatedPackages,
+} = require('../publish-updated-packages');
 // $FlowFixMe[cannot-write]
 global.fetch = fetchMock;
 
diff --git a/scripts/releases/__tests__/upload-release-assets-for-dotslash-test.js b/scripts/releases/__tests__/upload-release-assets-for-dotslash-test.js
index cf125a11de8e..6f9cf680e0d1 100644
--- a/scripts/releases/__tests__/upload-release-assets-for-dotslash-test.js
+++ b/scripts/releases/__tests__/upload-release-assets-for-dotslash-test.js
@@ -10,6 +10,10 @@
 
 'use strict';
 
+// @octokit/rest is ESM-only, which Jest can't load, and these tests pass their
+// own client.
+jest.mock('@octokit/rest', () => ({Octokit: jest.fn()}));
+
 const {
   getReleaseAssetMap,
   uploadReleaseAssetsForDotSlashFile,
diff --git a/scripts/releases/utils/__tests__/npm-utils-test.js b/scripts/releases/utils/__tests__/npm-utils-test.js
index 2ece11afa4fd..b3e43d69fe94 100644
--- a/scripts/releases/utils/__tests__/npm-utils-test.js
+++ b/scripts/releases/utils/__tests__/npm-utils-test.js
@@ -8,8 +8,6 @@
  * @format
  */
 
-const {getNpmInfo, publishPackage} = require('../npm-utils');
-
 const execMock = jest.fn();
 const getCurrentCommitMock = jest.fn();
 const exitIfNotOnGitMock = jest.fn();
@@ -23,6 +21,8 @@ jest.mock('./../scm-utils', () => ({
   exitIfNotOnGit: exitIfNotOnGitMock,
 }));
 
+const {getNpmInfo, publishPackage} = require('../npm-utils');
+
 describe('npm-utils', () => {
   beforeEach(() => {
     jest.resetModules();
diff --git a/scripts/releases/utils/__tests__/scm-utils-test.js b/scripts/releases/utils/__tests__/scm-utils-test.js
index 250d8a84b36c..f17b40714fb1 100644
--- a/scripts/releases/utils/__tests__/scm-utils-test.js
+++ b/scripts/releases/utils/__tests__/scm-utils-test.js
@@ -8,8 +8,6 @@
  * @format
  */
 
-const {isTaggedLatest} = require('../scm-utils');
-
 let execResult = null;
 
 jest
@@ -37,6 +35,8 @@ jest
       ),
   }));
 
+const {isTaggedLatest} = require('../scm-utils');
+
 describe('scm-utils', () => {
   beforeEach(() => {
     jest.resetModules();