diff --git a/.c8rc.json b/.c8rc.json
new file mode 100644
index 00000000000..6f4b7c5b170
--- /dev/null
+++ b/.c8rc.json
@@ -0,0 +1,13 @@
+{
+  "all": true,
+  "reporter": [
+    "lcov",
+    "text",
+    "html",
+    "text-summary"
+  ],
+  "include": [
+    "lib/**/*.js",
+    "index.js"
+  ]
+}
\ No newline at end of file
diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index df5a0297da7..bbbae1d1be5 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -24,6 +24,11 @@ jobs:
       post-test-steps: |
         - name: Coverage Report
           uses: codecov/codecov-action@v4
+    secrets:
+      test-secrets: |-
+        {
+          "NODE_V8_COVERAGE": "./coverage/tmp"
+        }
   automerge:
     if: >
       github.event_name == 'pull_request' && github.event.pull_request.user.login == 'dependabot[bot]'
diff --git a/.gitignore b/.gitignore
index acd1b69eca2..0d8d333f83a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -79,3 +79,6 @@ fuzz-results-*.json
 # Bundle output
 undici-fetch.js
 /test/imports/undici-import.js
+
+# .npmrc has platform specific value for windows
+.npmrc
diff --git a/package.json b/package.json
index 0c42aa0696f..c92f162d860 100644
--- a/package.json
+++ b/package.json
@@ -67,27 +67,31 @@
     "build:wasm": "node build/wasm.js --docker",
     "lint": "standard | snazzy",
     "lint:fix": "standard --fix | snazzy",
-    "test": "node scripts/generate-pem && npm run test:unit && npm run test:node-fetch && npm run test:fetch && npm run test:cookies && npm run test:eventsource && npm run test:wpt && npm run test:websocket && npm run test:jest && npm run test:typescript && npm run test:node-test",
-    "test:cookies": "borp --coverage -p \"test/cookie/*.js\"",
-    "test:node-fetch": "borp --coverage -p \"test/node-fetch/**/*.js\"",
-    "test:eventsource": "npm run build:node && borp --expose-gc --coverage -p \"test/eventsource/*.js\"",
-    "test:fetch": "npm run build:node && borp --expose-gc --coverage -p \"test/fetch/*.js\" && borp --coverage -p \"test/webidl/*.js\"",
-    "test:jest": "jest",
+    "test": "npm run test:javascript && npm run test:typescript",
+    "test:javascript": "node scripts/generate-pem && npm run test:unit && npm run test:node-fetch && npm run test:fetch && npm run test:cookies && npm run test:eventsource && npm run test:wpt && npm run test:websocket && npm run test:node-test && npm run test:jest",
+    "test:cookies": "borp -p \"test/cookie/*.js\"",
+    "test:node-fetch": "borp -p \"test/node-fetch/**/*.js\"",
+    "test:eventsource": "npm run build:node && borp --expose-gc -p \"test/eventsource/*.js\"",
+    "test:fetch": "npm run build:node && borp --expose-gc -p \"test/fetch/*.js\" && borp -p \"test/webidl/*.js\"",
+    "test:jest": "cross-env NODE_V8_COVERAGE= jest",
     "test:unit": "borp --expose-gc -p \"test/*.js\"",
-    "test:node-test": "borp --coverage -p \"test/node-test/**/*.js\"",
-    "test:tdd": "borp --coverage --expose-gc -p \"test/*.js\"",
+    "test:node-test": "borp -p \"test/node-test/**/*.js\"",
+    "test:tdd": "borp --expose-gc -p \"test/*.js\"",
     "test:tdd:node-test": "borp -p \"test/node-test/**/*.js\" -w",
-    "test:typescript": "tsd && tsc --skipLibCheck test/imports/undici-import.ts",
-    "test:websocket": "borp --coverage -p \"test/websocket/*.js\"",
+    "test:typescript": "cross-env NODE_V8_COVERAGE= tsd && tsc --skipLibCheck test/imports/undici-import.ts",
+    "test:websocket": "borp -p \"test/websocket/*.js\"",
     "test:wpt": "node test/wpt/start-fetch.mjs && node test/wpt/start-FileAPI.mjs && node test/wpt/start-mimesniff.mjs && node test/wpt/start-xhr.mjs && node test/wpt/start-websockets.mjs && node test/wpt/start-cacheStorage.mjs && node test/wpt/start-eventsource.mjs",
-    "coverage": "nyc --reporter=text --reporter=html npm run test",
-    "coverage:ci": "nyc --reporter=lcov npm run test",
+    "coverage": "cross-env NODE_V8_COVERAGE=./coverage/tmp && npm run coverage:clean && npm run test && npm run coverage:report",
+    "coverage:ci": "npm run coverage:clean && npm run test && npm run coverage:report:ci",
+    "coverage:clean": "node ./scripts/clean-coverage.js",
+    "coverage:report": "cross-env NODE_V8_COVERAGE= c8 report",
+    "coverage:report:ci": "c8 report",
     "bench": "PORT=3042 concurrently -k -s first npm:bench:server npm:bench:run",
     "bench:server": "node benchmarks/server.js",
     "prebench:run": "node benchmarks/wait.js",
     "bench:run": "SAMPLES=100 CONNECTIONS=50 node benchmarks/benchmark.js",
     "serve:website": "docsify serve .",
-    "prepare": "husky install",
+    "prepare": "husky install && node ./scripts/platform-shell.js",
     "fuzz": "jsfuzz test/fuzzing/fuzz.js corpus"
   },
   "devDependencies": {
@@ -98,8 +102,10 @@
     "abort-controller": "^3.0.0",
     "axios": "^1.6.5",
     "borp": "^0.9.1",
+    "c8": "^9.1.0",
     "concurrently": "^8.0.1",
     "cronometro": "^3.0.1",
+    "cross-env": "^7.0.3",
     "dns-packet": "^5.4.0",
     "docsify-cli": "^4.4.3",
     "form-data": "^4.0.0",
diff --git a/scripts/clean-coverage.js b/scripts/clean-coverage.js
new file mode 100644
index 00000000000..23c30895241
--- /dev/null
+++ b/scripts/clean-coverage.js
@@ -0,0 +1,14 @@
+'use strict'
+
+const { rmSync } = require('node:fs')
+const { resolve } = require('node:path')
+
+if (process.env.NODE_V8_COVERAGE) {
+  if (process.env.NODE_V8_COVERAGE.endsWith('/tmp')) {
+    rmSync(resolve(__dirname, process.env.NODE_V8_COVERAGE, '..'), { recursive: true, force: true })
+  } else {
+    rmSync(resolve(__dirname, process.env.NODE_V8_COVERAGE), { recursive: true, force: true })
+  }
+} else {
+  rmSync(resolve(__dirname, 'coverage'), { recursive: true, force: true })
+}
diff --git a/scripts/platform-shell.js b/scripts/platform-shell.js
new file mode 100644
index 00000000000..093ce536a77
--- /dev/null
+++ b/scripts/platform-shell.js
@@ -0,0 +1,12 @@
+'use strict'
+
+const { platform } = require('node:os')
+const { writeFileSync } = require('node:fs')
+const { resolve } = require('node:path')
+
+if (platform() === 'win32') {
+  writeFileSync(
+    resolve(__dirname, '.npmrc'),
+    'script-shell = "C:\\windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe"\n'
+  )
+}
diff --git a/test/wpt/runner/runner.mjs b/test/wpt/runner/runner.mjs
index cbd5ea540d8..2a4bee2f269 100644
--- a/test/wpt/runner/runner.mjs
+++ b/test/wpt/runner/runner.mjs
@@ -177,6 +177,9 @@ export class WPTRunner extends EventEmitter {
           url.search = variant
         }
         const worker = new Worker(workerPath, {
+          env: {
+            NODE_V8_COVERAGE: process.env.NODE_V8_COVERAGE
+          },
           workerData: {
             // Code to load before the test harness and tests.
             initScripts: this.#initScripts,