diff --git a/.github/workflows/package-manager-ci.yml b/.github/workflows/package-manager-ci.yml
new file mode 100644
index 000000000..20bd81cd8
--- /dev/null
+++ b/.github/workflows/package-manager-ci.yml
@@ -0,0 +1,91 @@
+name: package-manager-ci
+on:
+  push:
+    branches:
+      - main
+      - package-manager-load
+jobs:
+  pnpm:
+    name: pnpm package manager on ${{ matrix.node-version }} ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+        node-version: [14]
+    steps:
+      - uses: actions/checkout@v2.3.4
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2.4.0
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Use pnpm
+        uses: pnpm/action-setup@v2.0.1
+        with:
+          version: ^6.0.0
+      - name: Install dependancies
+        run: pnpm install
+      - name: Tests
+        run: pnpm run test-ci-pnpm
+
+  yarn:
+    name: yarn package manager on ${{ matrix.node-version }} ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+        node-version: [14]
+    steps:
+      - uses: actions/checkout@v2.3.4
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2.4.0
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Use yarn
+        run: |
+          yarn set version berry && yarn set version 2
+          echo "nodeLinker: node-modules" >> .yarnrc.yml
+          # see https://github.com/yarnpkg/berry/issues/2935#issuecomment-911299992
+          yarn add --dev typescript@~4.3.2
+          yarn install
+        env:
+          # needed due the yarn.lock file in pino's .gitignore
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
+      - name: Tests
+        run: yarn run test-ci
+
+  yarn-pnp:
+    name: yarn-pnp package manager on ${{ matrix.node-version }} ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+        node-version: [14]
+    steps:
+      - uses: actions/checkout@v2.3.4
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2.4.0
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Use yarn
+        run: |
+          yarn set version berry
+          echo 'nodeLinker: pnp
+          packageExtensions:
+            debug@*:
+              dependencies:
+                supports-color: "*"
+            treport@*:
+              dependencies:
+                tap-yaml: "*"
+          ' >> .yarnrc.yml
+          yarn add --dev typescript@~4.3.2
+          yarn install
+          yarn add --dev transport@link:./test/fixtures/transport
+        env:
+          # needed due the yarn.lock file in pino's .gitignore
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
+      - name: Tests
+        run: yarn run test-ci-yarn-pnp
diff --git a/.gitignore b/.gitignore
index b552ce577..bab272c8f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,6 +26,12 @@ build/Release
 # Dependency directory
 node_modules
 
+# yarn cache
+.yarn
+.yarnrc.yml
+.pnp
+.pnp.*
+
 # Optional npm cache directory
 .npm
 
diff --git a/lib/worker.js b/lib/worker.js
index 0b6c4989b..184ade043 100644
--- a/lib/worker.js
+++ b/lib/worker.js
@@ -10,8 +10,19 @@ const build = require('pino-abstract-transport')
 
 module.exports = async function ({ targets }) {
   targets = await Promise.all(targets.map(async (t) => {
-    const toLoad = 'file://' + t.target
-    const stream = await (await import(toLoad)).default(t.options)
+    let fn
+    try {
+      const toLoad = 'file://' + t.target
+      fn = (await import(toLoad)).default
+    } catch (error) {
+      // See this PR for details: https://github.com/pinojs/thread-stream/pull/34
+      if ((error.code === 'ENOTDIR' || error.code === 'ERR_MODULE_NOT_FOUND')) {
+        fn = require(t.target)
+      } else {
+        throw error
+      }
+    }
+    const stream = await fn(t.options)
     return {
       level: t.level,
       stream
diff --git a/package.json b/package.json
index ab1a67617..2e157e20e 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,8 @@
     "lint": "eslint .",
     "test": "npm run lint && tap test/*test.js test/*/*test.js && npm run test-types",
     "test-ci": "npm run lint && tap --no-check-coverage test/*test.js test/*/*test.js --coverage-report=lcovonly && npm run test-types",
+    "test-ci-pnpm": "pnpm run lint && tap --no-coverage --no-check-coverage test/*test.js test/*/*test.js && pnpm run test-types",
+    "test-ci-yarn-pnp": "yarn run lint && tap --no-check-coverage test/*test.js test/*/*test.js --coverage-report=lcovonly",
     "test-types": "tsc && tsd && ts-node test/types/pino.ts",
     "cov-ui": "tap --coverage-report=html test/*test.js test/*/*test.js",
     "bench": "node benchmarks/utils/runbench all",
@@ -108,7 +110,7 @@
     "pino-std-serializers": "^4.0.0",
     "quick-format-unescaped": "^4.0.3",
     "sonic-boom": "^2.2.1",
-    "thread-stream": "^0.11.0"
+    "thread-stream": "^0.11.1"
   },
   "tsd": {
     "directory": "test/types"
diff --git a/test/esm/index.test.js b/test/esm/index.test.js
index 0d1a96cc8..80ac19212 100644
--- a/test/esm/index.test.js
+++ b/test/esm/index.test.js
@@ -3,7 +3,9 @@
 const t = require('tap')
 const semver = require('semver')
 
-if (!semver.satisfies(process.versions.node, '^13.3.0 || ^12.10.0 || >= 14.0.0')) {
+const { isYarnPnp } = require('../helper')
+
+if (!semver.satisfies(process.versions.node, '^13.3.0 || ^12.10.0 || >= 14.0.0') || isYarnPnp) {
   t.skip('Skip esm because not supported by Node')
 } else {
   // Node v8 throw a `SyntaxError: Unexpected token import`
@@ -17,7 +19,7 @@ if (!semver.satisfies(process.versions.node, '^13.3.0 || ^12.10.0 || >= 14.0.0')
   })
 }
 
-if (!semver.satisfies(process.versions.node, '>= 14.13.0 || ^12.20.0')) {
+if (!semver.satisfies(process.versions.node, '>= 14.13.0 || ^12.20.0') || isYarnPnp) {
   t.skip('Skip named exports because not supported by Node')
 } else {
   // Node v8 throw a `SyntaxError: Unexpected token import`
diff --git a/test/helper.js b/test/helper.js
index ed8073453..f2f468008 100644
--- a/test/helper.js
+++ b/test/helper.js
@@ -8,6 +8,7 @@ const pid = process.pid
 const hostname = os.hostname()
 
 const isWin = process.platform === 'win32'
+const isYarnPnp = process.versions.pnp !== undefined
 
 function getPathToNull () {
   return isWin ? '\\\\.\\NUL' : '/dev/null'
@@ -72,4 +73,4 @@ function watchFileCreated (filename) {
   })
 }
 
-module.exports = { getPathToNull, sink, check, once, sleep, watchFileCreated, isWin }
+module.exports = { getPathToNull, sink, check, once, sleep, watchFileCreated, isWin, isYarnPnp }
diff --git a/test/transport.test.js b/test/transport.test.js
index 9cd95ee5d..d77e99843 100644
--- a/test/transport.test.js
+++ b/test/transport.test.js
@@ -5,7 +5,7 @@ const { join } = require('path')
 const { once } = require('events')
 const { readFile, symlink, unlink } = require('fs').promises
 const { test } = require('tap')
-const { isWin, watchFileCreated } = require('./helper')
+const { isWin, isYarnPnp, watchFileCreated } = require('./helper')
 const pino = require('../')
 const url = require('url')
 const strip = require('strip-ansi')
@@ -15,6 +15,26 @@ const writer = require('flush-write-stream')
 const { pid } = process
 const hostname = os.hostname()
 
+async function installTransportModule () {
+  if (isYarnPnp) {
+    return
+  }
+  try {
+    await uninstallTransportModule()
+  } catch {}
+  await symlink(
+    join(__dirname, 'fixtures', 'transport'),
+    join(__dirname, '..', 'node_modules', 'transport')
+  )
+}
+
+async function uninstallTransportModule () {
+  if (isYarnPnp) {
+    return
+  }
+  await unlink(join(__dirname, '..', 'node_modules', 'transport'))
+}
+
 test('pino.transport with file', async ({ same, teardown }) => {
   const destination = join(
     os.tmpdir(),
@@ -53,21 +73,14 @@ test('pino.transport with package', { skip: isWin }, async ({ same, teardown })
     '_' + Math.random().toString(36).substr(2, 9)
   )
 
-  try {
-    await unlink(join(__dirname, '..', 'node_modules', 'transport'))
-  } catch {}
-
-  await symlink(
-    join(__dirname, 'fixtures', 'transport'),
-    join(__dirname, '..', 'node_modules', 'transport')
-  )
+  await installTransportModule()
 
   const transport = pino.transport({
     target: 'transport',
     options: { destination }
   })
   teardown(async () => {
-    await unlink(join(__dirname, '..', 'node_modules', 'transport'))
+    await uninstallTransportModule()
     transport.end()
   })
   const instance = pino(transport)
@@ -297,14 +310,7 @@ test('pino.transport with package as a target', { skip: isWin }, async ({ same,
     '_' + Math.random().toString(36).substr(2, 9)
   )
 
-  try {
-    await unlink(join(__dirname, '..', 'node_modules', 'transport'))
-  } catch {}
-
-  await symlink(
-    join(__dirname, 'fixtures', 'transport'),
-    join(__dirname, '..', 'node_modules', 'transport')
-  )
+  await installTransportModule()
 
   const transport = pino.transport({
     targets: [{
@@ -313,7 +319,7 @@ test('pino.transport with package as a target', { skip: isWin }, async ({ same,
     }]
   })
   teardown(async () => {
-    await unlink(join(__dirname, '..', 'node_modules', 'transport'))
+    await uninstallTransportModule()
     transport.end()
   })
   const instance = pino(transport)