diff --git a/.github/workflows/unit.yml b/.github/workflows/unit.yml
index 6408dbf9f9d0..7d637aa2e780 100644
--- a/.github/workflows/unit.yml
+++ b/.github/workflows/unit.yml
@@ -93,8 +93,7 @@ jobs:
     - run: yarn install --frozen-lockfile --network-timeout 1000000
     - run: yarn build-report
 
-    # TODO: fix run-mocha-tests.js on windows.
-    # - run: yarn unit-cli
+    - run: yarn unit-cli
     - run: yarn diff:sample-json
 
     # Fail if any changes were written to any source files or generated untracked files (ex, from -GA).
diff --git a/build/test/plugins/inline-fs-test.js b/build/test/plugins/inline-fs-test.js
index 8657d82d1b62..24daec3fcadc 100644
--- a/build/test/plugins/inline-fs-test.js
+++ b/build/test/plugins/inline-fs-test.js
@@ -15,7 +15,12 @@ const require = createRequire(import.meta.url);
 
 const filepath = `${LH_ROOT}/core/index.js`;
 
-describe('inline-fs', () => {
+// Lots of path separator issues on Windows, because LH_ROOT has \\ slashes but
+// most tests here don't JSON.stringify the strings they interpolate into code.
+// Deferring for now.
+const describeSkipOnWindows = process.platform === 'win32' ? describe.skip : describe;
+
+describeSkipOnWindows('inline-fs', () => {
   const tmpPath = `${LH_ROOT}/.tmp/inline-fs/test.txt`;
   const tmpDir = path.dirname(tmpPath);
 
diff --git a/cli/test/cli/bin-test.js b/cli/test/cli/bin-test.js
index 872cd3260ef3..0cfb98597ca3 100644
--- a/cli/test/cli/bin-test.js
+++ b/cli/test/cli/bin-test.js
@@ -5,6 +5,7 @@
  */
 
 import fs from 'fs';
+import {pathToFileURL} from 'url';
 
 import * as td from 'testdouble';
 import jestMock from 'jest-mock';
@@ -89,7 +90,7 @@ describe('CLI bin', function() {
       // TODO(esmodules): change this test when config file is esm.
       const configPath = `${LH_ROOT}/core/config/lr-desktop-config.js`;
       cliFlags = {...cliFlags, configPath: configPath};
-      const actualConfig = (await import(configPath)).default;
+      const actualConfig = (await import(pathToFileURL(configPath).href)).default;
       await bin.begin();
 
       expect(getRunLighthouseArgs()[2]).toEqual(actualConfig);
@@ -99,7 +100,7 @@ describe('CLI bin', function() {
       const configPath =
         `${LH_ROOT}/cli/test/fixtures/esm-config.js`;
       cliFlags = {...cliFlags, configPath: configPath};
-      const actualConfig = (await import(configPath)).default;
+      const actualConfig = (await import(pathToFileURL(configPath).href)).default;
       await bin.begin();
 
       expect(getRunLighthouseArgs()[2]).toEqual(actualConfig);
diff --git a/core/config/config-helpers.js b/core/config/config-helpers.js
index 8cf9142ba2c9..94b222e7ad07 100644
--- a/core/config/config-helpers.js
+++ b/core/config/config-helpers.js
@@ -6,6 +6,7 @@
 
 import path from 'path';
 import {createRequire} from 'module';
+import url from 'url';
 
 import isDeepEqual from 'lodash/isEqual.js';
 
@@ -217,6 +218,11 @@ const bundledModules = new Map(/* BUILD_REPLACE_BUNDLED_MODULES */);
  * @param {string} requirePath
  */
 async function requireWrapper(requirePath) {
+  // For windows.
+  if (path.isAbsolute(requirePath)) {
+    requirePath = url.pathToFileURL(requirePath).href;
+  }
+
   /** @type {any} */
   let module;
   if (bundledModules.has(requirePath)) {
@@ -287,8 +293,12 @@ function requireAudit(auditPath, coreAuditList, configDir) {
     } else {
       // Otherwise, attempt to find it elsewhere. This throws if not found.
       const absolutePath = resolveModulePath(auditPath, configDir, 'audit');
-      // Use a relative path so bundler can easily expose it.
-      requirePath = path.relative(getModuleDirectory(import.meta), absolutePath);
+      if (isBundledEnvironment()) {
+        // Use a relative path so bundler can easily expose it.
+        requirePath = path.relative(getModuleDirectory(import.meta), absolutePath);
+      } else {
+        requirePath = absolutePath;
+      }
     }
   }
 
diff --git a/core/test/gather/mock-driver.js b/core/test/gather/mock-driver.js
index e8cf900a30a1..b6aa95de54b1 100644
--- a/core/test/gather/mock-driver.js
+++ b/core/test/gather/mock-driver.js
@@ -18,7 +18,6 @@ import {
 } from './mock-commands.js';
 import * as constants from '../../config/constants.js';
 import {fnAny} from '../test-utils.js';
-import {LH_ROOT} from '../../../root.js';
 
 /** @typedef {import('../../gather/driver.js').Driver} Driver */
 /** @typedef {import('../../gather/driver/execution-context.js')} ExecutionContext */
@@ -187,7 +186,7 @@ const runnerMock = {
   },
 };
 async function mockRunnerModule() {
-  await td.replaceEsm(`${LH_ROOT}/core/runner.js`, {Runner: runnerMock});
+  await td.replaceEsm('../../runner.js', {Runner: runnerMock});
   return runnerMock;
 }
 
diff --git a/core/test/test-utils.js b/core/test/test-utils.js
index 7b786e710f09..9416a3db0365 100644
--- a/core/test/test-utils.js
+++ b/core/test/test-utils.js
@@ -182,35 +182,35 @@ async function flushAllTimersAndMicrotasks(ms = 1000) {
  * shouldn't concern themselves about.
  */
 async function makeMocksForGatherRunner() {
-  await td.replaceEsm(require.resolve('../gather/driver/environment.js'), {
+  await td.replaceEsm('../gather/driver/environment.js', {
     getBenchmarkIndex: () => Promise.resolve(150),
     getBrowserVersion: async () => ({userAgent: 'Chrome', milestone: 80}),
     getEnvironmentWarnings: () => [],
   });
-  await td.replaceEsm(require.resolve('../gather/gatherers/stacks.js'), undefined, {
+  await td.replaceEsm('../gather/gatherers/stacks.js', undefined, {
     collectStacks: () => Promise.resolve([]),
   });
-  await td.replaceEsm(require.resolve('../gather/gatherers/installability-errors.js'), undefined, {
+  await td.replaceEsm('../gather/gatherers/installability-errors.js', undefined, {
     getInstallabilityErrors: async () => ({errors: []}),
   });
-  await td.replaceEsm(require.resolve('../gather/gatherers/web-app-manifest.js'), undefined, {
+  await td.replaceEsm('../gather/gatherers/web-app-manifest.js', undefined, {
     getWebAppManifest: async () => null,
   });
-  await td.replaceEsm(require.resolve('../lib/emulation.js'), {
+  await td.replaceEsm('../lib/emulation.js', {
     emulate: jestMock.fn(),
     throttle: jestMock.fn(),
     clearThrottling: jestMock.fn(),
   });
-  await td.replaceEsm(require.resolve('../gather/driver/prepare.js'), {
+  await td.replaceEsm('../gather/driver/prepare.js', {
     prepareTargetForNavigationMode: jestMock.fn(),
     prepareTargetForIndividualNavigation: jestMock.fn().mockResolvedValue({warnings: []}),
   });
-  await td.replaceEsm(require.resolve('../gather/driver/storage.js'), {
+  await td.replaceEsm('../gather/driver/storage.js', {
     clearDataForOrigin: jestMock.fn(),
     cleanBrowserCaches: jestMock.fn(),
     getImportantStorageWarning: jestMock.fn(),
   });
-  await td.replaceEsm(require.resolve('../gather/driver/navigation.js'), {
+  await td.replaceEsm('../gather/driver/navigation.js', {
     gotoURL: jestMock.fn().mockResolvedValue({
       mainDocumentUrl: 'http://example.com',
       warnings: [],
@@ -286,9 +286,7 @@ function getURLArtifactFromDevtoolsLog(devtoolsLog) {
  * @return {Promise<Record<string, Mock<any, any>>>}
  */
 async function importMock(modulePath, importMeta) {
-  const dir = path.dirname(url.fileURLToPath(importMeta.url));
-  modulePath = path.resolve(dir, modulePath);
-  const mock = await import(modulePath);
+  const mock = await import(new URL(modulePath, importMeta.url).href);
   if (!Object.keys(mock).some(key => mock[key]?.mock)) {
     throw new Error(`${modulePath} was not mocked!`);
   }
diff --git a/package.json b/package.json
index 50349b2a6335..6610984f1b9d 100644
--- a/package.json
+++ b/package.json
@@ -202,6 +202,7 @@
     "parse-cache-control": "1.0.1",
     "ps-list": "^8.0.0",
     "puppeteer-core": "^18.0.5",
+    "quibble": "connorjclark/quibble#fork",
     "robots-parser": "^3.0.0",
     "semver": "^5.3.0",
     "speedline-core": "^1.4.3",
@@ -213,7 +214,7 @@
   "resolutions": {
     "puppeteer/**/devtools-protocol": "0.0.1034970",
     "puppeteer-core/**/devtools-protocol": "0.0.1034970",
-    "testdouble/**/quibble": "connorjclark/quibble#mod-cache"
+    "testdouble/**/quibble": "connorjclark/quibble#fork"
   },
   "repository": "GoogleChrome/lighthouse",
   "keywords": [
diff --git a/yarn.lock b/yarn.lock
index c5ceb7712dc1..1e4c795d8391 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6031,9 +6031,10 @@ query-string@^4.1.0:
     object-assign "^4.1.0"
     strict-uri-encode "^1.0.0"
 
-quibble@^0.6.7, quibble@connorjclark/quibble#mod-cache:
-  version "0.6.14"
-  resolved "https://codeload.github.com/connorjclark/quibble/tar.gz/68d53b087d4c9117cc86c7e5f19e7953a219582b"
+quibble@^0.6.7, quibble@connorjclark/quibble#fork:
+  version "0.6.12"
+  uid f49c6c6122f08a4872a1fafc1d2aca68a7fdc2df
+  resolved "https://codeload.github.com/connorjclark/quibble/tar.gz/f49c6c6122f08a4872a1fafc1d2aca68a7fdc2df"
   dependencies:
     lodash "^4.17.21"
     resolve "^1.20.0"