diff --git a/.commitlintrc.js b/.commitlintrc.js
new file mode 100644
index 0000000..5b0b1a5
--- /dev/null
+++ b/.commitlintrc.js
@@ -0,0 +1,10 @@
+/* This file is automatically added by @npmcli/template-oss. Do not edit. */
+
+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+  rules: {
+    'type-enum': [2, 'always', ['feat', 'fix', 'docs', 'deps', 'chore']],
+    'header-max-length': [2, 'always', 80],
+    'subject-case': [0, 'always', ['lower-case', 'sentence-case', 'start-case']],
+  },
+}
diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..5db9f81
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,17 @@
+/* This file is automatically added by @npmcli/template-oss. Do not edit. */
+
+'use strict'
+
+const { readdirSync: readdir } = require('fs')
+
+const localConfigs = readdir(__dirname)
+  .filter((file) => file.startsWith('.eslintrc.local.'))
+  .map((file) => `./${file}`)
+
+module.exports = {
+  root: true,
+  extends: [
+    '@npmcli',
+    ...localConfigs,
+  ],
+}
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 0000000..2c54b0d
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,3 @@
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+* @npm/cli-team
diff --git a/.github/ISSUE_TEMPLATE/bug.yml b/.github/ISSUE_TEMPLATE/bug.yml
new file mode 100644
index 0000000..d043192
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/bug.yml
@@ -0,0 +1,54 @@
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+name: Bug
+description: File a bug/issue
+title: "[BUG] <title>"
+labels: [ Bug, Needs Triage ]
+
+body:
+  - type: checkboxes
+    attributes:
+      label: Is there an existing issue for this?
+      description: Please [search here](./issues) to see if an issue already exists for your problem.
+      options:
+        - label: I have searched the existing issues
+          required: true
+  - type: textarea
+    attributes:
+      label: Current Behavior
+      description: A clear & concise description of what you're experiencing.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Expected Behavior
+      description: A clear & concise description of what you expected to happen.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Steps To Reproduce
+      description: Steps to reproduce the behavior.
+      value: |
+        1. In this environment...
+        2. With this config...
+        3. Run '...'
+        4. See error...
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Environment
+      description: |
+        examples:
+          - **npm**: 7.6.3
+          - **Node**: 13.14.0
+          - **OS**: Ubuntu 20.04
+          - **platform**: Macbook Pro
+      value: |
+        - npm:
+        - Node:
+        - OS:
+        - platform:
+    validations:
+      required: false
diff --git a/.github/ISSUE_TEMPLATE/config.yml b/.github/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..d640909
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,3 @@
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+blank_issues_enabled: true
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..96d8eaf
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,17 @@
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+version: 2
+
+updates:
+  - package-ecosystem: npm
+    directory: "/"
+    schedule:
+      interval: daily
+    allow:
+      - dependency-type: direct
+    versioning-strategy: increase-if-necessary
+    commit-message:
+      prefix: deps
+      prefix-development: chore
+    labels:
+      - "Dependencies"
diff --git a/.github/workflows/audit.yml b/.github/workflows/audit.yml
new file mode 100644
index 0000000..6471612
--- /dev/null
+++ b/.github/workflows/audit.yml
@@ -0,0 +1,27 @@
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+name: Audit
+
+on:
+  workflow_dispatch:
+  schedule:
+    # "At 01:00 on Monday" https://crontab.guru/#0_1_*_*_1
+    - cron: "0 1 * * 1"
+
+jobs:
+  audit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup git user
+        run: |
+          git config --global user.email "npm-cli+bot@github.com"
+          git config --global user.name "npm CLI robot"
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+      - name: Update npm to latest
+        run: npm i --prefer-online --no-fund --no-audit -g npm@latest
+      - run: npm -v
+      - run: npm i --ignore-scripts --no-audit --no-fund --package-lock
+      - run: npm audit
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..7a62d9a
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,86 @@
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+name: CI
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - '*'
+  push:
+    branches:
+      - main
+      - latest
+  schedule:
+    # "At 02:00 on Monday" https://crontab.guru/#0_2_*_*_1
+    - cron: "0 2 * * 1"
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup git user
+        run: |
+          git config --global user.email "npm-cli+bot@github.com"
+          git config --global user.name "npm CLI robot"
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+      - name: Update npm to latest
+        run: npm i --prefer-online --no-fund --no-audit -g npm@latest
+      - run: npm -v
+      - run: npm i --ignore-scripts --no-audit --no-fund
+      - run: npm run lint
+
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 12.13.0
+          - 12.x
+          - 14.15.0
+          - 14.x
+          - 16.0.0
+          - 16.x
+        platform:
+          - os: ubuntu-latest
+            shell: bash
+          - os: macos-latest
+            shell: bash
+          - os: windows-latest
+            shell: cmd
+    runs-on: ${{ matrix.platform.os }}
+    defaults:
+      run:
+        shell: ${{ matrix.platform.shell }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup git user
+        run: |
+          git config --global user.email "npm-cli+bot@github.com"
+          git config --global user.name "npm CLI robot"
+      - uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Update to workable npm (windows)
+        # node 12 and 14 ship with npm@6, which is known to fail when updating itself in windows
+        if: matrix.platform.os == 'windows-latest' && (startsWith(matrix.node-version, '12.') || startsWith(matrix.node-version, '14.'))
+        run: |
+          curl -sO https://registry.npmjs.org/npm/-/npm-7.5.4.tgz
+          tar xf npm-7.5.4.tgz
+          cd package
+          node lib/npm.js install --no-fund --no-audit -g ..\npm-7.5.4.tgz
+          cd ..
+          rmdir /s /q package
+      - name: Update npm to 7
+        # If we do test on npm 10 it needs npm7
+        if: startsWith(matrix.node-version, '10.')
+        run: npm i --prefer-online --no-fund --no-audit -g npm@7
+      - name: Update npm to latest
+        if: ${{ !startsWith(matrix.node-version, '10.') }}
+        run: npm i --prefer-online --no-fund --no-audit -g npm@latest
+      - run: npm -v
+      - run: npm i --ignore-scripts --no-audit --no-fund
+      - run: npm test --ignore-scripts
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
new file mode 100644
index 0000000..5d97411
--- /dev/null
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,44 @@
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+name: "CodeQL"
+
+on:
+  push:
+    branches:
+      - main
+      - latest
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches:
+      - main
+      - latest
+  schedule:
+    # "At 03:00 on Monday" https://crontab.guru/#0_3_*_*_1
+    - cron: "0 3 * * 1"
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ javascript ]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup git user
+        run: |
+          git config --global user.email "npm-cli+bot@github.com"
+          git config --global user.name "npm CLI robot"
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
+        with:
+          languages: ${{ matrix.language }}
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1
diff --git a/.github/workflows/post-dependabot.yml b/.github/workflows/post-dependabot.yml
new file mode 100644
index 0000000..b6e81e6
--- /dev/null
+++ b/.github/workflows/post-dependabot.yml
@@ -0,0 +1,43 @@
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+name: Post Dependabot Actions
+
+on: pull_request
+
+# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions
+permissions:
+  contents: write
+
+jobs:
+  template-oss-apply:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup git user
+        run: |
+          git config --global user.email "npm-cli+bot@github.com"
+          git config --global user.name "npm CLI robot"
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+      - name: Update npm to latest
+        run: npm i --prefer-online --no-fund --no-audit -g npm@latest
+      - run: npm -v
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v1.1.1
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+      - name: npm install and commit
+        if: contains(steps.metadata.outputs.dependency-names, '@npmcli/template-oss')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh pr checkout ${{ github.event.pull_request.number }}
+          npm install --ignore-scripts --no-audit --no-fund
+          npm run template-oss-apply
+          git add .
+          git commit -am "chore: postinstall for dependabot template-oss PR"
+          git push
+          npm run lint
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
new file mode 100644
index 0000000..7223076
--- /dev/null
+++ b/.github/workflows/pull-request.yml
@@ -0,0 +1,38 @@
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+name: Pull Request Linting
+
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - edited
+      - synchronize
+
+jobs:
+  check:
+    name: Check PR Title or Commits
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Setup git user
+        run: |
+          git config --global user.email "npm-cli+bot@github.com"
+          git config --global user.name "npm CLI robot"
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+      - name: Update npm to latest
+        run: npm i --prefer-online --no-fund --no-audit -g npm@latest
+      - run: npm -v
+      - name: Install deps
+        run: npm i -D @commitlint/cli @commitlint/config-conventional
+      - name: Check commits OR PR title
+        env:
+          PR_TITLE: ${{ github.event.pull_request.title }}
+        run: |
+          npx --offline commitlint -V --from origin/main --to ${{ github.event.pull_request.head.sha }} \
+            || echo $PR_TITLE | npx --offline commitlint -V
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
new file mode 100644
index 0000000..ab3a910
--- /dev/null
+++ b/.github/workflows/release-please.yml
@@ -0,0 +1,26 @@
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+name: Release Please
+
+on:
+  push:
+    branches:
+      - main
+      - latest
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: google-github-actions/release-please-action@v3
+        id: release
+        with:
+          release-type: node
+          changelog-types: >
+            [
+              {"type":"feat","section":"Features","hidden":false},
+              {"type":"fix","section":"Bug Fixes","hidden":false},
+              {"type":"docs","section":"Documentation","hidden":false},
+              {"type":"deps","section":"Dependencies","hidden":false},
+              {"type":"chore","hidden":true}
+            ]
diff --git a/.gitignore b/.gitignore
index a8c8a17..be5771f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,26 @@
-test/*/
-coverage
-.nyc_output
-node_modules
+# This file is automatically added by @npmcli/template-oss. Do not edit.
+
+# ignore everything in the root
+/*
+
+# keep these
+!/.eslintrc.local.*
+!**/.gitignore
+!/docs/
+!/tap-snapshots/
+!/test/
+!/map.js
+!/scripts/
+!/README*
+!/LICENSE*
+!/CHANGELOG*
+!/.commitlintrc.js
+!/.eslintrc.js
+!/.github/
+!/.gitignore
+!/.npmrc
+!/CODE_OF_CONDUCT.md
+!/SECURITY.md
+!/bin/
+!/lib/
+!/package.json
diff --git a/.npmrc b/.npmrc
new file mode 100644
index 0000000..529f93e
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1,3 @@
+; This file is automatically added by @npmcli/template-oss. Do not edit.
+
+package-lock=false
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 0d88af3..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,12 +0,0 @@
-language: node_js
-sudo: false
-node_js:
-  - 7
-  - 6
-  - 4
-notifications:
-  email: false
-cache:
-  directories:
-    - $HOME/.npm
-    - node_modules
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000..167043c
--- /dev/null
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,7 @@
+<!-- This file is automatically added by @npmcli/template-oss. Do not edit. -->
+
+All interactions in this repo are covered by the [npm Code of
+Conduct](https://docs.npmjs.com/policies/conduct)
+
+The npm cli team may, at its own discretion, moderate, remove, or edit
+any interactions such as pull requests, issues, and comments.
diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 0000000..a93106d
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,3 @@
+<!-- This file is automatically added by @npmcli/template-oss. Do not edit. -->
+
+Please send vulnerability reports through [hackerone](https://hackerone.com/github).
diff --git a/index.js b/lib/index.js
similarity index 91%
rename from index.js
rename to lib/index.js
index 378ddc4..4f54ca6 100644
--- a/index.js
+++ b/lib/index.js
@@ -73,10 +73,11 @@ class BundleWalker extends EE {
 
   start () {
     const pj = path.resolve(this.path, 'package.json')
-    if (this.packageJsonCache.has(pj))
+    if (this.packageJsonCache.has(pj)) {
       this.onPackage(this.packageJsonCache.get(pj))
-    else
+    } else {
       this.readPackageJson(pj)
+    }
     return this
   }
 
@@ -112,11 +113,11 @@ class BundleWalker extends EE {
       : bdRaw === true ? this.allDepsBundled(pkg)
       : Object.keys(bdRaw)))
 
-    if (!bd.length)
+    if (!bd.length) {
       return this.done()
+    }
 
     this.bundle = bd
-    const nm = this.path + '/node_modules'
     this.readModules()
   }
 
@@ -130,8 +131,9 @@ class BundleWalker extends EE {
     this.node_modules = nm
 
     this.bundle.forEach(dep => this.childDep(dep))
-    if (this.children === 0)
+    if (this.children === 0) {
       this.done()
+    }
   }
 
   childDep (dep) {
@@ -150,21 +152,18 @@ class BundleWalker extends EE {
     this.children += 1
     const child = new BundleWalker({
       path: p,
-      parent: this
+      parent: this,
     })
     child.on('done', _ => {
-      if (--this.children === 0)
+      if (--this.children === 0) {
         this.done()
+      }
     })
     child.start()
   }
 }
 
 class BundleWalkerSync extends BundleWalker {
-  constructor (opt) {
-    super(opt)
-  }
-
   start () {
     super.start()
     this.done()
@@ -174,14 +173,16 @@ class BundleWalkerSync extends BundleWalker {
   readPackageJson (pj) {
     try {
       this.onPackageJson(pj, fs.readFileSync(pj))
-    } catch (er) {}
+    } catch {
+      // empty catch
+    }
     return this
   }
 
   readModules () {
     try {
       this.onReaddir(readdirNodeModulesSync(this.path + '/node_modules'))
-    } catch (er) {
+    } catch {
       this.onReaddir([])
     }
   }
@@ -189,30 +190,32 @@ class BundleWalkerSync extends BundleWalker {
   child (dep) {
     new BundleWalkerSync({
       path: this.path + '/node_modules/' + dep,
-      parent: this
+      parent: this,
     }).start()
   }
 }
 
 const readdirNodeModules = (nm, cb) => {
   fs.readdir(nm, (er, set) => {
-    if (er)
+    if (er) {
       cb(er)
-    else {
+    } else {
       const scopes = set.filter(f => /^@/.test(f))
-      if (!scopes.length)
+      if (!scopes.length) {
         cb(null, set)
-      else {
+      } else {
         const unscoped = set.filter(f => !/^@/.test(f))
         let count = scopes.length
         scopes.forEach(scope => {
-          fs.readdir(nm + '/' + scope, (er, pkgs) => {
-            if (er || !pkgs.length)
+          fs.readdir(nm + '/' + scope, (readdirEr, pkgs) => {
+            if (readdirEr || !pkgs.length) {
               unscoped.push(scope)
-            else
+            } else {
               unscoped.push.apply(unscoped, pkgs.map(p => scope + '/' + p))
-            if (--count === 0)
+            }
+            if (--count === 0) {
               cb(null, unscoped)
+            }
           })
         })
       }
diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index 3308d34..0000000
--- a/package-lock.json
+++ /dev/null
@@ -1,3635 +0,0 @@
-{
-  "name": "npm-bundled",
-  "version": "1.1.2",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "ajv": {
-      "version": "5.5.2",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
-      "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
-      "dev": true,
-      "requires": {
-        "co": "^4.6.0",
-        "fast-deep-equal": "^1.0.0",
-        "fast-json-stable-stringify": "^2.0.0",
-        "json-schema-traverse": "^0.3.0"
-      }
-    },
-    "ansi-regex": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-      "dev": true
-    },
-    "argparse": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
-      "dev": true,
-      "requires": {
-        "sprintf-js": "~1.0.2"
-      }
-    },
-    "asn1": {
-      "version": "0.2.4",
-      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
-      "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
-      "dev": true,
-      "requires": {
-        "safer-buffer": "~2.1.0"
-      }
-    },
-    "assert-plus": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-      "dev": true
-    },
-    "asynckit": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
-      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
-      "dev": true
-    },
-    "aws-sign2": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
-      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg=",
-      "dev": true
-    },
-    "aws4": {
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-          "integrity": "sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==",
-          "dev": true,
-          "requires": {
-            "glob": "^7.1.3"
-          },
-          "dependencies": {
-            "glob": {
-              "version": "7.1.6",
-              "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
-              "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
-              "dev": true,
-              "requires": {
-                "fs.realpath": "^1.0.0",
-                "inflight": "^1.0.4",
-                "inherits": "2",
-                "minimatch": "^3.0.4",
-                "once": "^1.3.0",
-                "path-is-absolute": "^1.0.0"
-              }
-            }
-          }
-        }
-      }
-    },
-    "tap-mocha-reporter": {
-      "version": "3.0.7",
-      "resolved": "https://registry.npmjs.org/tap-mocha-reporter/-/tap-mocha-reporter-3.0.7.tgz",
-      "integrity": "sha512-GHVXJ38C3oPRpM3YUc43JlGdpVZYiKeT1fmAd3HH2+J+ZWwsNAUFvRRdoGsXLw9+gU9o+zXpBqhS/oXyRQYwlA==",
-      "dev": true,
-      "requires": {
-        "color-support": "^1.1.0",
-        "debug": "^2.1.3",
-        "diff": "^1.3.2",
-        "escape-string-regexp": "^1.0.3",
-        "glob": "^7.0.5",
-        "js-yaml": "^3.3.1",
-        "readable-stream": "^2.1.5",
-        "tap-parser": "^5.1.0",
-        "unicode-length": "^1.0.0"
-      },
-      "dependencies": {
-        "tap-parser": {
-          "version": "5.4.0",
-          "resolved": "https://registry.npmjs.org/tap-parser/-/tap-parser-5.4.0.tgz",
-          "integrity": "sha512-BIsIaGqv7uTQgTW1KLTMNPSEQf4zDDPgYOBRdgOfuB+JFOLRBfEu6cLa/KvMvmqggu1FKXDfitjLwsq4827RvA==",
-          "dev": true,
-          "requires": {
-            "events-to-array": "^1.0.1",
-            "js-yaml": "^3.2.7",
-            "readable-stream": "^2"
-          }
-        }
-      }
-    },
-    "tap-parser": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/tap-parser/-/tap-parser-7.0.0.tgz",
-      "integrity": "sha512-05G8/LrzqOOFvZhhAk32wsGiPZ1lfUrl+iV7+OkKgfofZxiceZWMHkKmow71YsyVQ8IvGBP2EjcIjE5gL4l5lA==",
-      "dev": true,
-      "requires": {
-        "events-to-array": "^1.0.1",
-        "js-yaml": "^3.2.7",
-        "minipass": "^2.2.0"
-      }
-    },
-    "tmatch": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/tmatch/-/tmatch-4.0.0.tgz",
-      "integrity": "sha512-Ynn2Gsp+oCvYScQXeV+cCs7citRDilq0qDXA6tuvFwDgiYyyaq7D5vKUlAPezzZR5NDobc/QMeN6e5guOYmvxg==",
-      "dev": true
-    },
-    "tough-cookie": {
-      "version": "2.3.4",
-      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.3.4.tgz",
-      "integrity": "sha512-TZ6TTfI5NtZnuyy/Kecv+CnoROnyXn2DN97LontgQpCwsX2XyLYCC0ENhYkehSOwAp8rTQKc/NUIF7BkQ5rKLA==",
-      "dev": true,
-      "requires": {
-        "punycode": "^1.4.1"
-      }
-    },
-    "trivial-deferred": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/trivial-deferred/-/trivial-deferred-1.0.1.tgz",
-      "integrity": "sha1-N21NKdlR1jaKb3oK6FwvTV4GWPM=",
-      "dev": true
-    },
-    "tsame": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/tsame/-/tsame-2.0.0.tgz",
-      "integrity": "sha512-dAuzcnOPdqZYojylFQzEes95UDjve3HqKrlTCeLZKSDPMTsn3smzHZqsJj/sWD8wOUkg0RD++B11evyLn2+bIw==",
-      "dev": true
-    },
-    "tunnel-agent": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
-      "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
-      "dev": true,
-      "requires": {
-        "safe-buffer": "^5.0.1"
-      }
-    },
-    "tweetnacl": {
-      "version": "0.14.5",
-      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
-      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "dev": true,
-      "optional": true
-    },
-    "unicode-length": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/unicode-length/-/unicode-length-1.0.3.tgz",
-      "integrity": "sha1-Wtp6f+1RhBpBijKM8UlHisg1irs=",
-      "dev": true,
-      "requires": {
-        "punycode": "^1.3.2",
-        "strip-ansi": "^3.0.1"
-      }
-    },
-    "util-deprecate": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
-      "dev": true,
-      "optional": true
-    },
-    "uuid": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
-      "dev": true
-    },
-    "verror": {
-      "version": "1.10.0",
-      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
-      "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
-      "dev": true,
-      "requires": {
-        "assert-plus": "^1.0.0",
-        "core-util-is": "1.0.2",
-        "extsprintf": "^1.2.0"
-      }
-    },
-    "which": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
-      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
-      "dev": true,
-      "requires": {
-        "isexe": "^2.0.0"
-      }
-    },
-    "wrappy": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-      "dev": true
-    },
-    "write-file-atomic": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.3.0.tgz",
-      "integrity": "sha512-xuPeK4OdjWqtfi59ylvVL0Yn35SF3zgcAcv7rBPFHVaEapaDr4GdGgm3j7ckTwH9wHL7fGmgfAnb0+THrHb8tA==",
-      "dev": true,
-      "requires": {
-        "graceful-fs": "^4.1.11",
-        "imurmurhash": "^0.1.4",
-        "signal-exit": "^3.0.2"
-      }
-    },
-    "yallist": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
-      "dev": true
-    },
-    "yapool": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/yapool/-/yapool-1.0.0.tgz",
-      "integrity": "sha1-9pPymjFbUNmp2iZGp6ZkXJaYW2o=",
-      "dev": true
-    }
-  }
-}
diff --git a/package.json b/package.json
index cf20e29..7dd7fe9 100644
--- a/package.json
+++ b/package.json
@@ -2,29 +2,46 @@
   "name": "npm-bundled",
   "version": "1.1.2",
   "description": "list things in node_modules that are bundledDependencies, or transitive dependencies thereof",
-  "main": "index.js",
+  "main": "lib/index.js",
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/npm/npm-bundled.git"
+    "url": "https://github.com/npm/npm-bundled.git"
   },
-  "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)",
+  "author": "GitHub Inc.",
   "license": "ISC",
   "devDependencies": {
-    "mkdirp": "^0.5.1",
-    "mutate-fs": "^1.1.0",
-    "rimraf": "^2.6.1",
-    "tap": "^12.0.1"
+    "@npmcli/eslint-config": "^3.1.0",
+    "@npmcli/template-oss": "3.5.0",
+    "mkdirp": "^1.0.4",
+    "mutate-fs": "^2.1.1",
+    "rimraf": "^3.0.2",
+    "tap": "^16.3.0"
   },
   "scripts": {
-    "test": "tap test/*.js -J --100",
+    "test": "tap",
     "preversion": "npm test",
     "postversion": "npm publish",
-    "postpublish": "git push origin --all; git push origin --tags"
+    "postpublish": "git push origin --all; git push origin --tags",
+    "lint": "eslint \"**/*.js\"",
+    "postlint": "template-oss-check",
+    "template-oss-apply": "template-oss-apply --force",
+    "lintfix": "npm run lint -- --fix",
+    "prepublishOnly": "git push origin --follow-tags",
+    "snap": "tap",
+    "posttest": "npm run lint"
   },
   "files": [
-    "index.js"
+    "bin/",
+    "lib/"
   ],
   "dependencies": {
     "npm-normalize-package-bin": "^1.0.1"
+  },
+  "engines": {
+    "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
+  },
+  "templateOSS": {
+    "//@npmcli/template-oss": "This file is partially managed by @npmcli/template-oss. Edits may be overwritten.",
+    "version": "3.5.0"
   }
 }
diff --git a/test/all-bundle.js b/test/all-bundle.js
index d58fe3a..42e89e1 100644
--- a/test/all-bundle.js
+++ b/test/all-bundle.js
@@ -1,51 +1,48 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: 'a',
     version: '1.2.3',
     bundledDependencies: true,
     dependencies: {
       b: '1.2.3',
-      d: '1.2.3'
-    }
+      d: '1.2.3',
+    },
   },
   b: {
     d: { $package: {
       name: 'd',
       version: '1.2.3',
       dependencies: {
-        e: '1.2.3'
-      }
-    }},
+        e: '1.2.3',
+      },
+    } },
     $package: {
       name: 'b',
       version: '1.2.3',
       dependencies: {
         c: '1.2.3',
-        d: '1.2.3'
-      }
-    }
+        d: '1.2.3',
+      },
+    },
   },
   c: { $package: {
     name: 'c',
-    version: '1.2.3'
-  }},
+    version: '1.2.3',
+  } },
   d: { $package: {
     name: 'd',
     version: '1.2.3',
     dependencies: {
-      c: '1.2.3'
-    }
-  }},
+      c: '1.2.3',
+    },
+  } },
   e: { $package: {
     name: 'e',
-    version: '1.2.3'
-  }}
-}, t)
+    version: '1.2.3',
+  } },
+})
 
 const walk = require('../')
 
@@ -54,5 +51,5 @@ const check = (result, t) => {
   t.end()
 }
 
-t.test('sync', t => check(walk.sync({path: pkg}), t))
-t.test('async', t => walk({path: pkg}).then(res => check(res, t)))
+t.test('sync', t => check(walk.sync({ path: pkg }), t))
+t.test('async', t => walk({ path: pkg }).then(res => check(res, t)))
diff --git a/test/bad-json.js b/test/bad-json.js
index e922d54..912c452 100644
--- a/test/bad-json.js
+++ b/test/bad-json.js
@@ -1,52 +1,49 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: 'a',
     version: '1.2.3',
     dependencies: {
       b: '1.2.3',
-      d: '1.2.3'
+      d: '1.2.3',
     },
-    bundledDependencies: [ 'b' ]
+    bundledDependencies: ['b'],
   },
   b: {
     d: { $package: {
       name: 'd',
       version: '1.2.3',
       dependencies: {
-        e: '1.2.3'
-      }
-    }},
+        e: '1.2.3',
+      },
+    } },
     $package: {
       name: 'b',
       version: '1.2.3',
       dependencies: {
         c: '1.2.3',
-        d: '1.2.3'
-      }
-    }
+        d: '1.2.3',
+      },
+    },
   },
   c: { $package: {
     name: 'c',
-    version: '1.2.3'
-  }},
+    version: '1.2.3',
+  } },
   d: { $package: {
     name: 'd',
     version: '1.2.3',
     dependencies: {
-      c: '1.2.3'
-    }
-  }},
+      c: '1.2.3',
+    },
+  } },
   e: { $package: {
     name: 'e',
     version: '1.2.3',
-    invalid: true
-  }}
-}, t)
+    invalid: true,
+  } },
+})
 
 const walk = require('../')
 
@@ -55,5 +52,5 @@ const check = (result, t) => {
   t.end()
 }
 
-t.test('sync', t => check(walk.sync({path: pkg}), t))
-t.test('async', t => walk({path: pkg}).then(res => check(res, t)))
+t.test('sync', t => check(walk.sync({ path: pkg }), t))
+t.test('async', t => walk({ path: pkg }).then(res => check(res, t)))
diff --git a/test/basic.js b/test/basic.js
index 11438e3..d3ccc7b 100644
--- a/test/basic.js
+++ b/test/basic.js
@@ -1,51 +1,48 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: 'a',
     version: '1.2.3',
     dependencies: {
       b: '1.2.3',
-      d: '1.2.3'
+      d: '1.2.3',
     },
-    bundledDependencies: [ 'b' ]
+    bundledDependencies: ['b'],
   },
   b: {
     d: { $package: {
       name: 'd',
       version: '1.2.3',
       dependencies: {
-        e: '1.2.3'
-      }
-    }},
+        e: '1.2.3',
+      },
+    } },
     $package: {
       name: 'b',
       version: '1.2.3',
       dependencies: {
         c: '1.2.3',
-        d: '1.2.3'
-      }
-    }
+        d: '1.2.3',
+      },
+    },
   },
   c: { $package: {
     name: 'c',
-    version: '1.2.3'
-  }},
+    version: '1.2.3',
+  } },
   d: { $package: {
     name: 'd',
     version: '1.2.3',
     dependencies: {
-      c: '1.2.3'
-    }
-  }},
+      c: '1.2.3',
+    },
+  } },
   e: { $package: {
     name: 'e',
-    version: '1.2.3'
-  }}
-}, t)
+    version: '1.2.3',
+  } },
+})
 
 const walk = require('../')
 
@@ -54,5 +51,5 @@ const check = (result, t) => {
   t.end()
 }
 
-t.test('sync', t => check(walk.sync({path: pkg}), t))
-t.test('async', t => walk({path: pkg}).then(res => check(res, t)))
+t.test('sync', t => check(walk.sync({ path: pkg }), t))
+t.test('async', t => walk({ path: pkg }).then(res => check(res, t)))
diff --git a/test/caches.js b/test/caches.js
index f61a24e..62067ac 100644
--- a/test/caches.js
+++ b/test/caches.js
@@ -1,63 +1,61 @@
-'use strict'
 const t = require('tap')
 const fs = require('fs')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: 'a',
     version: '1.2.3',
     dependencies: {
       b: '1.2.3',
-      d: '1.2.3'
+      d: '1.2.3',
     },
-    bundledDependencies: [ 'b' ]
+    bundledDependencies: ['b'],
   },
   b: {
     d: { $package: {
       name: 'd',
       version: '1.2.3',
       dependencies: {
-        e: '1.2.3'
-      }
-    }},
+        e: '1.2.3',
+      },
+    } },
     $package: {
       name: 'b',
       version: '1.2.3',
       dependencies: {
         c: '1.2.3',
-        d: '1.2.3'
-      }
-    }
+        d: '1.2.3',
+      },
+    },
   },
   c: { $package: {
     name: 'c',
-    version: '1.2.3'
-  }},
+    version: '1.2.3',
+  } },
   d: { $package: {
     name: 'd',
     version: '1.2.3',
     dependencies: {
-      c: '1.2.3'
-    }
-  }},
+      c: '1.2.3',
+    },
+  } },
   e: { $package: {
     name: 'e',
-    version: '1.2.3'
-  }}
-}, t)
+    version: '1.2.3',
+  } },
+})
 
 const walk = require('../')
 
 const check = (result, t) => t.same(result, ['b', 'c', 'e'])
+const checkEmpty = (result, t) => t.same(result, [])
 
 t.test('sync', t => {
   t.plan(2)
   const bw = new walk.BundleWalkerSync({ path: pkg })
   const bw2 = new walk.BundleWalkerSync({
     path: pkg,
-    packageJsonCache: bw.packageJsonCache
+    packageJsonCache: bw.packageJsonCache,
   })
   bw.start()
   bw2.start()
@@ -70,7 +68,7 @@ t.test('async', t => {
   process.chdir(pkg)
   const bw = new walk.BundleWalker()
   const bw2 = new walk.BundleWalker({
-    packageJsonCache: bw.packageJsonCache
+    packageJsonCache: bw.packageJsonCache,
   })
   bw.on('done', result => check(result, t))
   bw2.on('done', result => check(result, t))
@@ -81,9 +79,9 @@ t.test('async', t => {
 t.test('mixed', t => {
   t.plan(2)
   process.chdir(pkg)
-  const bw = new walk.BundleWalkerSync({ path:pkg })
+  const bw = new walk.BundleWalkerSync({ path: pkg })
   const bw2 = new walk.BundleWalker({
-    packageJsonCache: bw.packageJsonCache
+    packageJsonCache: bw.packageJsonCache,
   })
   bw.start()
   check(bw.result, t)
@@ -97,20 +95,18 @@ t.test('mixed, nothing to bundle', t => {
     version: '1.2.3',
     dependencies: {
       b: '1.2.3',
-      d: '1.2.3'
+      d: '1.2.3',
     },
   }, null, 2))
 
-  const check = (result, t) => t.same(result, [])
-
   t.plan(2)
   process.chdir(pkg)
-  const bw = new walk.BundleWalkerSync({ path:pkg })
+  const bw = new walk.BundleWalkerSync({ path: pkg })
   const bw2 = new walk.BundleWalker({
-    packageJsonCache: bw.packageJsonCache
+    packageJsonCache: bw.packageJsonCache,
   })
   bw.start()
-  check(bw.result, t)
+  checkEmpty(bw.result, t)
   bw2.start()
-  bw2.addListener('done', result => check(result, t))
+  bw2.addListener('done', result => checkEmpty(result, t))
 })
diff --git a/test/cycle.js b/test/cycle.js
index 25f591a..3b45dc1 100644
--- a/test/cycle.js
+++ b/test/cycle.js
@@ -1,32 +1,29 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: 'a',
     version: '1.2.3',
     dependencies: {
-      b: '1.2.3'
+      b: '1.2.3',
     },
-    bundledDependencies: [ 'b' ]
+    bundledDependencies: ['b'],
   },
   b: { $package: {
     name: 'b',
     version: '1.2.3',
     dependencies: {
-      c: '1.2.3'
-    }
-  }},
+      c: '1.2.3',
+    },
+  } },
   c: { $package: {
     name: 'c',
     version: '1.2.3',
     dependencies: {
-      b: '1.2.3'
-    }
-  }}
-}, t)
+      b: '1.2.3',
+    },
+  } },
+})
 
 const walk = require('../')
 
@@ -35,5 +32,5 @@ const check = (result, t) => {
   t.end()
 }
 
-t.test('sync', t => check(walk.sync({path: pkg}), t))
-t.test('async', t => walk({path: pkg}).then(res => check(res, t)))
+t.test('sync', t => check(walk.sync({ path: pkg }), t))
+t.test('async', t => walk({ path: pkg }).then(res => check(res, t)))
diff --git a/test/metadeps.js b/test/metadeps.js
index 851f64a..c93ec0d 100644
--- a/test/metadeps.js
+++ b/test/metadeps.js
@@ -1,7 +1,4 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
 // dep graph:
 // root -> (a, b@1, c@1), BUNDLE(a)
@@ -21,7 +18,7 @@ const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 // +-- c@1
 // +-- d@1
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: 'root',
     version: '1.0.0',
@@ -30,7 +27,7 @@ require('./pkgtree.js')(pkg, {
       b: '1',
       c: '1',
     },
-    bundleDependencies: [ 'a' ]
+    bundleDependencies: ['a'],
   },
   a: {
     $package: {
@@ -45,26 +42,26 @@ require('./pkgtree.js')(pkg, {
       name: 'b',
       version: '2.0.0',
       dependencies: { d: '2.0.0' },
-    }},
+    } },
     c: { $package: {
       name: 'c',
       version: '2.0.0',
       dependencies: { d: '2.0.0' },
-    }},
-    d: { $package: { name: 'd', version: '2.0.0' }},
+    } },
+    d: { $package: { name: 'd', version: '2.0.0' } },
   },
   b: { $package: {
     name: 'b',
     version: '1.0.0',
-    dependencies: { d: '1.0.0' }
-  }},
+    dependencies: { d: '1.0.0' },
+  } },
   c: { $package: {
     name: 'c',
     version: '1.0.0',
-    dependencies: { d: '1.0.0' }
-  }},
-  d: { $package: { name: 'd', version: '1.0.0' }},
-}, t)
+    dependencies: { d: '1.0.0' },
+  } },
+  d: { $package: { name: 'd', version: '1.0.0' } },
+})
 
 const walk = require('../')
 
@@ -73,5 +70,5 @@ const check = (result, t) => {
   t.end()
 }
 
-t.test('sync', t => check(walk.sync({path: pkg}), t))
-t.test('async', t => walk({path: pkg}).then(res => check(res, t)))
+t.test('sync', t => check(walk.sync({ path: pkg }), t))
+t.test('async', t => walk({ path: pkg }).then(res => check(res, t)))
diff --git a/test/missing-package-json.js b/test/missing-package-json.js
index c32bf59..54ca994 100644
--- a/test/missing-package-json.js
+++ b/test/missing-package-json.js
@@ -1,48 +1,45 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: 'a',
     version: '1.2.3',
     dependencies: {
       b: '1.2.3',
-      d: '1.2.3'
+      d: '1.2.3',
     },
-    bundledDependencies: [ 'b' ]
+    bundledDependencies: ['b'],
   },
   b: {
     d: { $package: {
       name: 'd',
       version: '1.2.3',
       dependencies: {
-        e: '1.2.3'
-      }
-    }},
+        e: '1.2.3',
+      },
+    } },
     $package: {
       name: 'b',
       version: '1.2.3',
       dependencies: {
         c: '1.2.3',
-        d: '1.2.3'
-      }
-    }
+        d: '1.2.3',
+      },
+    },
   },
   c: { $package: {
     name: 'c',
-    version: '1.2.3'
-  }},
+    version: '1.2.3',
+  } },
   d: { $package: {
     name: 'd',
     version: '1.2.3',
     dependencies: {
-      c: '1.2.3'
-    }
-  }},
-  e: {}
-}, t)
+      c: '1.2.3',
+    },
+  } },
+  e: {},
+})
 
 const walk = require('../')
 
@@ -51,5 +48,5 @@ const check = (result, t) => {
   t.end()
 }
 
-t.test('sync', t => check(walk.sync({path: pkg}), t))
-t.test('async', t => walk({path: pkg}).then(res => check(res, t)))
+t.test('sync', t => check(walk.sync({ path: pkg }), t))
+t.test('async', t => walk({ path: pkg }).then(res => check(res, t)))
diff --git a/test/no-bundle.js b/test/no-bundle.js
index e98cb39..9d9d7bc 100644
--- a/test/no-bundle.js
+++ b/test/no-bundle.js
@@ -1,17 +1,14 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: 'a',
     version: '1.2.3',
     bundledDependencies: false,
     dependencies: {
       b: '1.2.3',
-      d: '1.2.3'
-    }
+      d: '1.2.3',
+    },
   },
   b: {
     d: { $package: {
@@ -19,34 +16,34 @@ require('./pkgtree.js')(pkg, {
       version: '1.2.3',
       bundleDependencies: false,
       dependencies: {
-        e: '1.2.3'
-      }
-    }},
+        e: '1.2.3',
+      },
+    } },
     $package: {
       name: 'b',
       version: '1.2.3',
       dependencies: {
         c: '1.2.3',
-        d: '1.2.3'
-      }
-    }
+        d: '1.2.3',
+      },
+    },
   },
   c: { $package: {
     name: 'c',
-    version: '1.2.3'
-  }},
+    version: '1.2.3',
+  } },
   d: { $package: {
     name: 'd',
     version: '1.2.3',
     dependencies: {
-      c: '1.2.3'
-    }
-  }},
+      c: '1.2.3',
+    },
+  } },
   e: { $package: {
     name: 'e',
-    version: '1.2.3'
-  }}
-}, t)
+    version: '1.2.3',
+  } },
+})
 
 const walk = require('../')
 
@@ -55,5 +52,5 @@ const check = (result, t) => {
   t.end()
 }
 
-t.test('sync', t => check(walk.sync({path: pkg}), t))
-t.test('async', t => walk({path: pkg}).then(res => check(res, t)))
+t.test('sync', t => check(walk.sync({ path: pkg }), t))
+t.test('async', t => walk({ path: pkg }).then(res => check(res, t)))
diff --git a/test/non-array-bundledeps.js b/test/non-array-bundledeps.js
index cd4b5f6..51c750c 100644
--- a/test/non-array-bundledeps.js
+++ b/test/non-array-bundledeps.js
@@ -1,53 +1,50 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: 'a',
     version: '1.2.3',
     dependencies: {
       b: '1.2.3',
-      d: '1.2.3'
+      d: '1.2.3',
     },
     bundledDependencies: {
-      'b': '1.2.3'
-    }
+      b: '1.2.3',
+    },
   },
   b: {
     d: { $package: {
       name: 'd',
       version: '1.2.3',
       dependencies: {
-        e: '1.2.3'
-      }
-    }},
+        e: '1.2.3',
+      },
+    } },
     $package: {
       name: 'b',
       version: '1.2.3',
       dependencies: {
         c: '1.2.3',
-        d: '1.2.3'
-      }
-    }
+        d: '1.2.3',
+      },
+    },
   },
   c: { $package: {
     name: 'c',
-    version: '1.2.3'
-  }},
+    version: '1.2.3',
+  } },
   d: { $package: {
     name: 'd',
     version: '1.2.3',
     dependencies: {
-      c: '1.2.3'
-    }
-  }},
+      c: '1.2.3',
+    },
+  } },
   e: { $package: {
     name: 'e',
-    version: '1.2.3'
-  }}
-}, t)
+    version: '1.2.3',
+  } },
+})
 
 const walk = require('../')
 
@@ -56,5 +53,5 @@ const check = (result, t) => {
   t.end()
 }
 
-t.test('sync', t => check(walk.sync({path: pkg}), t))
-t.test('async', t => walk({path: pkg}).then(res => check(res, t)))
+t.test('sync', t => check(walk.sync({ path: pkg }), t))
+t.test('async', t => walk({ path: pkg }).then(res => check(res, t)))
diff --git a/test/pkgtree.js b/test/pkgtree.js
index 93e0016..48440c4 100644
--- a/test/pkgtree.js
+++ b/test/pkgtree.js
@@ -2,24 +2,21 @@
 // create a package tree for a test
 // pass in the test object to rm on teardown
 
-const mkdirp = require('mkdirp')
-const fs = require('fs')
-const rimraf = require('rimraf')
-
-const pkgtree = module.exports = (dir, tree, t) => {
-  if (t)
-    t.teardown(_ => rimraf.sync(dir))
-
-  mkdirp.sync(dir)
-  Object.keys(tree).forEach(dep => {
+const generateTestdir = (tree) => {
+  return Object.entries(tree).reduce((acc, [dep, pkg]) => {
     if (dep === '$package') {
-      const pkg = tree[dep]
-      const output = pkg.invalid ? '💩' : (JSON.stringify(pkg, null, 2) + '\n')
-      fs.writeFileSync(dir + '/package.json', output)
-    } else
-      pkgtree(dir + '/node_modules/' + dep, tree[dep])
-  })
+      acc['package.json'] = pkg.invalid
+        ? '💩'
+        : (JSON.stringify(pkg, null, 2) + '\n')
+    } else {
+      acc.node_modules[dep] = generateTestdir(pkg)
+    }
+    return acc
+  }, { node_modules: {} })
 }
 
-if (require.main === module)
+module.exports = (t, tree) => t.testdir(generateTestdir(tree))
+
+if (require.main === module) {
   require('tap').pass('this is fine')
+}
diff --git a/test/readdir-fail.js b/test/readdir-fail.js
index 8bb93e4..4b3df55 100644
--- a/test/readdir-fail.js
+++ b/test/readdir-fail.js
@@ -1,52 +1,49 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 const mutateFS = require('mutate-fs')
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: 'a',
     version: '1.2.3',
     dependencies: {
       b: '1.2.3',
-      d: '1.2.3'
+      d: '1.2.3',
     },
-    bundledDependencies: [ 'b' ]
+    bundledDependencies: ['b'],
   },
   b: {
     d: { $package: {
       name: 'd',
       version: '1.2.3',
       dependencies: {
-        e: '1.2.3'
-      }
-    }},
+        e: '1.2.3',
+      },
+    } },
     $package: {
       name: 'b',
       version: '1.2.3',
       dependencies: {
         c: '1.2.3',
-        d: '1.2.3'
-      }
-    }
+        d: '1.2.3',
+      },
+    },
   },
   c: { $package: {
     name: 'c',
-    version: '1.2.3'
-  }},
+    version: '1.2.3',
+  } },
   d: { $package: {
     name: 'd',
     version: '1.2.3',
     dependencies: {
-      c: '1.2.3'
-    }
-  }},
+      c: '1.2.3',
+    },
+  } },
   e: { $package: {
     name: 'e',
-    version: '1.2.3'
-  }}
-}, t)
+    version: '1.2.3',
+  } },
+})
 
 const walk = require('../')
 
@@ -59,7 +56,7 @@ t.test('fail the readdir', t => {
   const poop = new Error('poop')
   t.teardown(mutateFS.fail('readdir', poop))
 
-  t.test('sync', t => check(walk.sync({path: pkg}), t))
-  t.test('async', t => walk({path: pkg}).then(res => check(res, t)))
+  t.test('sync', t => check(walk.sync({ path: pkg }), t))
+  t.test('async', t => walk({ path: pkg }).then(res => check(res, t)))
   t.end()
 })
diff --git a/test/scoped.js b/test/scoped.js
index 4e48220..5880553 100644
--- a/test/scoped.js
+++ b/test/scoped.js
@@ -1,51 +1,48 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: '@a/a',
     version: '1.2.3',
     dependencies: {
       '@x/b': '1.2.3',
-      '@y/d': '1.2.3'
+      '@y/d': '1.2.3',
     },
-    bundledDependencies: [ '@x/b' ]
+    bundledDependencies: ['@x/b'],
   },
   '@x/b': {
     '@y/d': { $package: {
       name: '@y/d',
       version: '1.2.3',
       dependencies: {
-        e: '1.2.3'
-      }
-    }},
+        e: '1.2.3',
+      },
+    } },
     $package: {
       name: '@x/b',
       version: '1.2.3',
       dependencies: {
         '@q/c': '1.2.3',
-        '@y/d': '1.2.3'
-      }
-    }
+        '@y/d': '1.2.3',
+      },
+    },
   },
   '@q/c': { $package: {
     name: '@q/c',
-    version: '1.2.3'
-  }},
+    version: '1.2.3',
+  } },
   '@y/d': { $package: {
     name: '@y/d',
     version: '1.2.3',
     dependencies: {
-      '@q/c': '1.2.3'
-    }
-  }},
+      '@q/c': '1.2.3',
+    },
+  } },
   e: { $package: {
     name: 'e',
-    version: '1.2.3'
-  }}
-}, t)
+    version: '1.2.3',
+  } },
+})
 
 const walk = require('../')
 
@@ -54,5 +51,5 @@ const check = (result, t) => {
   t.end()
 }
 
-t.test('sync', t => check(walk.sync({path: pkg}), t))
-t.test('async', t => walk({path: pkg}, (er, res) => check(res, t)))
+t.test('sync', t => check(walk.sync({ path: pkg }), t))
+t.test('async', t => walk({ path: pkg }, (er, res) => check(res, t)))
diff --git a/test/weird-scope.js b/test/weird-scope.js
index 4a37338..d0b74e2 100644
--- a/test/weird-scope.js
+++ b/test/weird-scope.js
@@ -1,9 +1,6 @@
-'use strict'
 const t = require('tap')
-const path = require('path')
-const pkg = path.resolve(__dirname, path.basename(__filename, '.js'))
 
-require('./pkgtree.js')(pkg, {
+const pkg = require('./pkgtree')(t, {
   $package: {
     name: '@a/a',
     version: '1.2.3',
@@ -11,43 +8,43 @@ require('./pkgtree.js')(pkg, {
       '@x/b': '1.2.3',
       '@y/d': '1.2.3',
       '@weird/asdf': '1.2.3',
-      '@missing/scope': '1.2.3'
+      '@missing/scope': '1.2.3',
     },
-    bundleDependencies: [ '@x/b', '@weird/asdf', '@missing/scope' ]
+    bundleDependencies: ['@x/b', '@weird/asdf', '@missing/scope'],
   },
   '@x/b': {
     '@y/d': { $package: {
       name: '@y/d',
       version: '1.2.3',
       dependencies: {
-        e: '1.2.3'
-      }
-    }},
+        e: '1.2.3',
+      },
+    } },
     $package: {
       name: '@x/b',
       version: '1.2.3',
       dependencies: {
         '@q/c': '1.2.3',
-        '@y/d': '1.2.3'
-      }
-    }
+        '@y/d': '1.2.3',
+      },
+    },
   },
   '@q/c': { $package: {
     name: '@q/c',
-    version: '1.2.3'
-  }},
+    version: '1.2.3',
+  } },
   '@y/d': { $package: {
     name: '@y/d',
     version: '1.2.3',
     dependencies: {
-      '@q/c': '1.2.3'
-    }
-  }},
+      '@q/c': '1.2.3',
+    },
+  } },
   e: { $package: {
     name: 'e',
-    version: '1.2.3'
-  }}
-}, t)
+    version: '1.2.3',
+  } },
+})
 
 // put a weird not-package thing in a node_modules @-scope "folder"
 const fs = require('fs')
@@ -61,5 +58,5 @@ const check = (result, t) => {
   t.end()
 }
 
-t.test('sync', t => check(walk.sync({path: pkg}), t))
-t.test('async', t => walk({path: pkg}).then(res => check(res, t)))
+t.test('sync', t => check(walk.sync({ path: pkg }), t))
+t.test('async', t => walk({ path: pkg }).then(res => check(res, t)))