diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b376201..f3dea8d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,22 +10,21 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        node-version: [18.18.2, 20.9.0]
     steps:
       - name: Set git to use LF
         run: |
           git config --global core.autocrlf false
           git config --global core.eol lf
       - uses: actions/checkout@v4
-      - name: Use Node.js ${{ matrix.node-version }}
+      - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version-file: .tool-versions
           cache: "npm"
       - run: npm ci
       - run: npm run lint
+      - run: npm run build
       - run: npm test
-      - run: npm run coverage
       - name: Coveralls
         uses: coverallsapp/github-action@master
         with:
diff --git a/.gitignore b/.gitignore
index 03756b2..9144394 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ dist/
 node_modules
 .nyc_output
 .idea
+coverage
diff --git a/.tool-versions b/.tool-versions
index c2ca3d3..59f2f81 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-nodejs 20.9.0
+nodejs 21.2.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35b6b7c..bbfaba1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,5 @@
+# Changelog
+
 ## [v0.2.0] - 2023-06-10
 
 - Now ignores workspaces that do not have a `name` property defined in their `package.json` file
diff --git a/README.md b/README.md
index bb98f3b..e7c3abc 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ Returns [`Workspace[]`](#workspace) or `null` if `dirname` is not inside a monor
 Type: `string | undefined`  
 Default: `process.cwd()`
 
-The directory to start looking for the monorepo root.
+The directory to start searching for the monorepo root.
 
 #### Options
 
@@ -67,7 +67,7 @@ Returns [`WorkspacesRoot`](#workspaceroot) or `null` if `dirname` is not inside
 Type: `string | undefined`  
 Default: `process.cwd()`
 
-The directory to start looking for the monorepo root.
+The directory to start searching for the monorepo root.
 
 #### Options
 
@@ -87,7 +87,8 @@ Returns a cache which can be provided to [`findWorkspaces`](#findworkspacesdirna
 Type: `string | undefined`  
 Default: `os.homedir()`
 
-The directory to stop looking for the monorepo root.
+The directory to stop searching for the monorepo root.  
+The provided directory will not be included in the search.
 
 #### cache
 
diff --git a/package-lock.json b/package-lock.json
index 7250872..c80d193 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,7 +17,6 @@
         "@types/node": "^20.9.2",
         "nyc": "^15.1.0",
         "prettier": "^3.1.0",
-        "rimraf": "^5.0.5",
         "ts-node": "^10.9.1",
         "typescript": "^5.2.2"
       }
@@ -351,102 +350,6 @@
         "@jridgewell/sourcemap-codec": "^1.4.10"
       }
     },
-    "node_modules/@isaacs/cliui": {
-      "version": "8.0.2",
-      "resolved": "https://registry.npmjs.org/@isaacs/cliui/-/cliui-8.0.2.tgz",
-      "integrity": "sha512-O8jcjabXaleOG9DQ0+ARXWZBTfnP4WNAqzuiJK7ll44AmxGKv/J2M4TPjxjY3znBCfvBXFzucm1twdyFybFqEA==",
-      "dev": true,
-      "dependencies": {
-        "string-width": "^5.1.2",
-        "string-width-cjs": "npm:string-width@^4.2.0",
-        "strip-ansi": "^7.0.1",
-        "strip-ansi-cjs": "npm:strip-ansi@^6.0.1",
-        "wrap-ansi": "^8.1.0",
-        "wrap-ansi-cjs": "npm:wrap-ansi@^7.0.0"
-      },
-      "engines": {
-        "node": ">=12"
-      }
-    },
-    "node_modules/@isaacs/cliui/node_modules/ansi-regex": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-6.0.1.tgz",
-      "integrity": "sha512-n5M855fKb2SsfMIiFFoVrABHJC8QtHwVx+mHWP3QcEqBHYienj5dHSgjbxtC0WEZXYt4wcD6zrQElDPhFuZgfA==",
-      "dev": true,
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/ansi-regex?sponsor=1"
-      }
-    },
-    "node_modules/@isaacs/cliui/node_modules/ansi-styles": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-6.2.1.tgz",
-      "integrity": "sha512-bN798gFfQX+viw3R7yrGWRqnrN2oRkEkUjjl4JNn4E8GxxbjtG3FbrEIIY3l8/hrwUwIeCZvi4QuOTP4MErVug==",
-      "dev": true,
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
-      }
-    },
-    "node_modules/@isaacs/cliui/node_modules/emoji-regex": {
-      "version": "9.2.2",
-      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-9.2.2.tgz",
-      "integrity": "sha512-L18DaJsXSUk2+42pv8mLs5jJT2hqFkFE4j21wOmgbUqsZ2hL72NsUU785g9RXgo3s0ZNgVl42TiHp3ZtOv/Vyg==",
-      "dev": true
-    },
-    "node_modules/@isaacs/cliui/node_modules/string-width": {
-      "version": "5.1.2",
-      "resolved": "https://registry.npmjs.org/string-width/-/string-width-5.1.2.tgz",
-      "integrity": "sha512-HnLOCR3vjcY8beoNLtcjZ5/nxn2afmME6lhrDrebokqMap+XbeW8n9TXpPDOqdGK5qcI3oT0GKTW6wC7EMiVqA==",
-      "dev": true,
-      "dependencies": {
-        "eastasianwidth": "^0.2.0",
-        "emoji-regex": "^9.2.2",
-        "strip-ansi": "^7.0.1"
-      },
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/@isaacs/cliui/node_modules/strip-ansi": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz",
-      "integrity": "sha512-iq6eVVI64nQQTRYq2KtEg2d2uU7LElhTJwsH4YzIHZshxlgZms/wIc4VoDQTlG/IvVIrBKG06CrZnp0qv7hkcQ==",
-      "dev": true,
-      "dependencies": {
-        "ansi-regex": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/strip-ansi?sponsor=1"
-      }
-    },
-    "node_modules/@isaacs/cliui/node_modules/wrap-ansi": {
-      "version": "8.1.0",
-      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-8.1.0.tgz",
-      "integrity": "sha512-si7QWI6zUMq56bESFvagtmzMdGOtoxfR+Sez11Mobfc7tm+VkUckk9bW2UeffTGVUbOksxmSw0AA2gs8g71NCQ==",
-      "dev": true,
-      "dependencies": {
-        "ansi-styles": "^6.1.0",
-        "string-width": "^5.0.1",
-        "strip-ansi": "^7.0.1"
-      },
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
-      }
-    },
     "node_modules/@istanbuljs/load-nyc-config": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.1.0.tgz",
@@ -552,16 +455,6 @@
         "node": ">= 8"
       }
     },
-    "node_modules/@pkgjs/parseargs": {
-      "version": "0.11.0",
-      "resolved": "https://registry.npmjs.org/@pkgjs/parseargs/-/parseargs-0.11.0.tgz",
-      "integrity": "sha512-+1VkjdD0QBLPodGrJUeqarH8VAIvQODIbwh9XpP5Syisf7YoQgsJKPNFoqqLQlu+VQ/tVSshMR6loPMn8U+dPg==",
-      "dev": true,
-      "optional": true,
-      "engines": {
-        "node": ">=14"
-      }
-    },
     "node_modules/@tsconfig/node10": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/@tsconfig/node10/-/node10-1.0.9.tgz",
@@ -922,12 +815,6 @@
         "node": ">=0.3.1"
       }
     },
-    "node_modules/eastasianwidth": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/eastasianwidth/-/eastasianwidth-0.2.0.tgz",
-      "integrity": "sha512-I88TYZWc9XiYHRQ4/3c5rjjfgkjhLyW2luGIheGERbNQ6OY7yTybanSpDXZa8y7VUP9YmDcYa+eyq4ca7iLqWA==",
-      "dev": true
-    },
     "node_modules/electron-to-chromium": {
       "version": "1.4.588",
       "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.4.588.tgz",
@@ -1340,21 +1227,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/istanbul-lib-processinfo/node_modules/rimraf": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
-      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
-      "dev": true,
-      "dependencies": {
-        "glob": "^7.1.3"
-      },
-      "bin": {
-        "rimraf": "bin.js"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
     "node_modules/istanbul-lib-report": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-3.0.1.tgz",
@@ -1465,24 +1337,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/jackspeak": {
-      "version": "2.3.6",
-      "resolved": "https://registry.npmjs.org/jackspeak/-/jackspeak-2.3.6.tgz",
-      "integrity": "sha512-N3yCS/NegsOBokc8GAdM8UcmfsKiSS8cipheD/nivzr700H+nsMOxJjQnvwOcRYVuFkdH0wGUvW2WbXGmrZGbQ==",
-      "dev": true,
-      "dependencies": {
-        "@isaacs/cliui": "^8.0.2"
-      },
-      "engines": {
-        "node": ">=14"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      },
-      "optionalDependencies": {
-        "@pkgjs/parseargs": "^0.11.0"
-      }
-    },
     "node_modules/js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -1611,15 +1465,6 @@
         "node": "*"
       }
     },
-    "node_modules/minipass": {
-      "version": "7.0.4",
-      "resolved": "https://registry.npmjs.org/minipass/-/minipass-7.0.4.tgz",
-      "integrity": "sha512-jYofLM5Dam9279rdkWzqHozUo4ybjdZmCsDHePy5V/PbBcVMiSZR97gmAy45aqi8CK1lG2ECd356FU86avfwUQ==",
-      "dev": true,
-      "engines": {
-        "node": ">=16 || 14 >=14.17"
-      }
-    },
     "node_modules/mlly": {
       "version": "1.4.2",
       "resolved": "https://registry.npmjs.org/mlly/-/mlly-1.4.2.tgz",
@@ -1696,21 +1541,6 @@
         "node": ">=8.9"
       }
     },
-    "node_modules/nyc/node_modules/rimraf": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
-      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
-      "dev": true,
-      "dependencies": {
-        "glob": "^7.1.3"
-      },
-      "bin": {
-        "rimraf": "bin.js"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
     "node_modules/once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
@@ -1810,67 +1640,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/path-scurry": {
-      "version": "1.10.1",
-      "resolved": "https://registry.npmjs.org/path-scurry/-/path-scurry-1.10.1.tgz",
-      "integrity": "sha512-MkhCqzzBEpPvxxQ71Md0b1Kk51W01lrYvlMzSUaIzNsODdd7mqhiimSZlr+VegAz5Z6Vzt9Xg2ttE//XBhH3EQ==",
-      "dev": true,
-      "dependencies": {
-        "lru-cache": "^9.1.1 || ^10.0.0",
-        "minipass": "^5.0.0 || ^6.0.2 || ^7.0.0"
-      },
-      "engines": {
-        "node": ">=16 || 14 >=14.17"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
-    "node_modules/path-scurry/node_modules/lru-cache": {
-      "version": "10.0.2",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-10.0.2.tgz",
-      "integrity": "sha512-Yj9mA8fPiVgOUpByoTZO5pNrcl5Yk37FcSHsUINpAsaBIEZIuqcCclDZJCVxqQShDsmYX8QG63svJiTbOATZwg==",
-      "dev": true,
-      "dependencies": {
-        "semver": "^7.3.5"
-      },
-      "engines": {
-        "node": "14 || >=16.14"
-      }
-    },
-    "node_modules/path-scurry/node_modules/semver": {
-      "version": "7.5.4",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-7.5.4.tgz",
-      "integrity": "sha512-1bCSESV6Pv+i21Hvpxp3Dx+pSD8lIPt8uVjRrxAUt/nbswYc+tK6Y2btiULjd4+fnq15PX+nqQDC7Oft7WkwcA==",
-      "dev": true,
-      "dependencies": {
-        "lru-cache": "^6.0.0"
-      },
-      "bin": {
-        "semver": "bin/semver.js"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
-    "node_modules/path-scurry/node_modules/semver/node_modules/lru-cache": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
-      "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
-      "dev": true,
-      "dependencies": {
-        "yallist": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
-    "node_modules/path-scurry/node_modules/yallist": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
-      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
-      "dev": true
-    },
     "node_modules/pathe": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/pathe/-/pathe-1.1.1.tgz",
@@ -2007,92 +1776,15 @@
       }
     },
     "node_modules/rimraf": {
-      "version": "5.0.5",
-      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-5.0.5.tgz",
-      "integrity": "sha512-CqDakW+hMe/Bz202FPEymy68P+G50RfMQK+Qo5YUqc9SPipvbGjCGKd0RSKEelbsfQuw3g5NZDSrlZZAJurH1A==",
-      "dev": true,
-      "dependencies": {
-        "glob": "^10.3.7"
-      },
-      "bin": {
-        "rimraf": "dist/esm/bin.mjs"
-      },
-      "engines": {
-        "node": ">=14"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
-    "node_modules/rimraf/node_modules/brace-expansion": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
-      "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
-      "dev": true,
-      "dependencies": {
-        "balanced-match": "^1.0.0"
-      }
-    },
-    "node_modules/rimraf/node_modules/foreground-child": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/foreground-child/-/foreground-child-3.1.1.tgz",
-      "integrity": "sha512-TMKDUnIte6bfb5nWv7V/caI169OHgvwjb7V4WkeUvbQQdjr5rWKqHFiKWb/fcOwB+CzBT+qbWjvj+DVwRskpIg==",
-      "dev": true,
-      "dependencies": {
-        "cross-spawn": "^7.0.0",
-        "signal-exit": "^4.0.1"
-      },
-      "engines": {
-        "node": ">=14"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
-    "node_modules/rimraf/node_modules/glob": {
-      "version": "10.3.10",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-10.3.10.tgz",
-      "integrity": "sha512-fa46+tv1Ak0UPK1TOy/pZrIybNNt4HCv7SDzwyfiOZkvZLEbjsZkJBPtDHVshZjbecAoAGSC20MjLDG/qr679g==",
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
+      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
       "dev": true,
       "dependencies": {
-        "foreground-child": "^3.1.0",
-        "jackspeak": "^2.3.5",
-        "minimatch": "^9.0.1",
-        "minipass": "^5.0.0 || ^6.0.2 || ^7.0.0",
-        "path-scurry": "^1.10.1"
+        "glob": "^7.1.3"
       },
       "bin": {
-        "glob": "dist/esm/bin.mjs"
-      },
-      "engines": {
-        "node": ">=16 || 14 >=14.17"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
-    "node_modules/rimraf/node_modules/minimatch": {
-      "version": "9.0.3",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-9.0.3.tgz",
-      "integrity": "sha512-RHiac9mvaRw0x3AYRgDC1CxAP7HTcNrrECeA8YYJeWnpo+2Q5CegtZjaotWTWxDG3UeGA1coE05iH1mPjT/2mg==",
-      "dev": true,
-      "dependencies": {
-        "brace-expansion": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=16 || 14 >=14.17"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
-    "node_modules/rimraf/node_modules/signal-exit": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-4.1.0.tgz",
-      "integrity": "sha512-bzyZ1e88w9O1iNJbKnOlvYTrWPDl46O1bG0D3XInv+9tkPrxrN8jUUTiFlDkkmKWgn1M6CfIA13SuGqOa9Korw==",
-      "dev": true,
-      "engines": {
-        "node": ">=14"
+        "rimraf": "bin.js"
       },
       "funding": {
         "url": "https://github.com/sponsors/isaacs"
@@ -2188,21 +1880,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/spawn-wrap/node_modules/rimraf": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
-      "integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
-      "dev": true,
-      "dependencies": {
-        "glob": "^7.1.3"
-      },
-      "bin": {
-        "rimraf": "bin.js"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
     "node_modules/sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
@@ -2223,21 +1900,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/string-width-cjs": {
-      "name": "string-width",
-      "version": "4.2.3",
-      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
-      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
-      "dependencies": {
-        "emoji-regex": "^8.0.0",
-        "is-fullwidth-code-point": "^3.0.0",
-        "strip-ansi": "^6.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/strip-ansi": {
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
@@ -2250,19 +1912,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/strip-ansi-cjs": {
-      "name": "strip-ansi",
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
-      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
-      "dependencies": {
-        "ansi-regex": "^5.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/strip-bom": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-4.0.0.tgz",
@@ -2483,57 +2132,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/wrap-ansi-cjs": {
-      "name": "wrap-ansi",
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
-      "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
-      "dev": true,
-      "dependencies": {
-        "ansi-styles": "^4.0.0",
-        "string-width": "^4.1.0",
-        "strip-ansi": "^6.0.0"
-      },
-      "engines": {
-        "node": ">=10"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
-      }
-    },
-    "node_modules/wrap-ansi-cjs/node_modules/ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dev": true,
-      "dependencies": {
-        "color-convert": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
-      }
-    },
-    "node_modules/wrap-ansi-cjs/node_modules/color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "dev": true,
-      "dependencies": {
-        "color-name": "~1.1.4"
-      },
-      "engines": {
-        "node": ">=7.0.0"
-      }
-    },
-    "node_modules/wrap-ansi-cjs/node_modules/color-name": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
-      "dev": true
-    },
     "node_modules/wrap-ansi/node_modules/ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
diff --git a/package.json b/package.json
index 01c80ba..75780d7 100644
--- a/package.json
+++ b/package.json
@@ -11,21 +11,24 @@
     "lerna",
     "bolt"
   ],
-  "repository": "joshuajaco/find-workspaces",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/joshuajaco/find-workspaces.git"
+  },
   "license": "MIT",
   "exports": "./dist/index.js",
   "main": "dist/index.js",
   "types": "dist/index.d.js",
   "files": [
-    "dist/"
+    "dist/",
+    "CHANGELOG.md"
   ],
   "scripts": {
-    "build": "rimraf dist && tsc",
-    "coverage": "mkdir -p coverage && touch coverage/lcov.info && nyc report --reporter=text-lcov > coverage/lcov.info",
+    "build": "rm -rf dist && tsc",
     "format": "prettier -w .",
     "lint": "prettier -c .",
     "prepublishOnly": "npm run build",
-    "test": "nyc ts-node tests"
+    "test": "nyc -r=lcov -r=text node --trace-warnings -r ts-node/register --test \"**/*.test.ts\""
   },
   "dependencies": {
     "fast-glob": "^3.3.2",
@@ -36,7 +39,6 @@
     "@types/node": "^20.9.2",
     "nyc": "^15.1.0",
     "prettier": "^3.1.0",
-    "rimraf": "^5.0.5",
     "ts-node": "^10.9.1",
     "typescript": "^5.2.2"
   }
diff --git a/index.ts b/src/index.ts
similarity index 96%
rename from index.ts
rename to src/index.ts
index 122d975..3851bab 100644
--- a/index.ts
+++ b/src/index.ts
@@ -1,6 +1,6 @@
-import { resolve, join, posix, sep } from "path";
-import { homedir } from "os";
-import { readFileSync } from "fs";
+import { resolve, join, posix, sep } from "node:path";
+import { homedir } from "node:os";
+import { readFileSync } from "node:fs";
 import { sync as glob } from "fast-glob";
 import type { PackageJson } from "pkg-types";
 import { parse as parseYAML } from "yaml";
@@ -37,7 +37,7 @@ export function findWorkspacesRoot(dirname?: string, options: Options = {}) {
 
   if (cache) {
     for (const [key, value] of cache.root.entries()) {
-      if (dir.startsWith(key + sep)) return value;
+      if ((dir + sep).startsWith(key + sep)) return value;
     }
   }
 
diff --git a/tests/findRoot.test.ts b/tests/findRoot.test.ts
index 252d9b9..9e3d853 100644
--- a/tests/findRoot.test.ts
+++ b/tests/findRoot.test.ts
@@ -1,113 +1,129 @@
-import assert from "assert";
-import { join, resolve } from "path";
+import assert from "node:assert";
+import { describe, it } from "node:test";
+import { resolve } from "node:path";
 import { posixResolve } from "./posixResolve";
-import { createWorkspacesCache, findWorkspacesRoot } from "../index";
-
-assert.deepStrictEqual(findWorkspacesRoot(join("."), { stopDir: "bla" }), null);
-
-assert.deepStrictEqual(
-  findWorkspacesRoot(join("fixtures", "bolt", "packages", "a"), {
-    stopDir: join("fixtures", "bolt", "packages"),
-  }),
-  null,
-);
-
-assert.strictEqual(findWorkspacesRoot(), null);
-
-assert.deepStrictEqual(findWorkspacesRoot(join("fixtures", "bolt")), {
-  location: posixResolve("fixtures", "bolt"),
-  globs: ["packages/**/*"],
-});
-
-assert.deepStrictEqual(
-  findWorkspacesRoot(join("fixtures", "lerna-with-packages")),
-  {
-    location: posixResolve("fixtures", "lerna-with-packages"),
-    globs: ["packages/*"],
-  },
-);
-
-assert.strictEqual(
-  findWorkspacesRoot(join("fixtures", "lerna-with-invalid-packages")),
-  null,
-);
-
-assert.deepStrictEqual(findWorkspacesRoot(join("fixtures", "lerna")), {
-  location: posixResolve("fixtures", "lerna"),
-  globs: ["packages/*"],
-});
-
-assert.strictEqual(
-  findWorkspacesRoot(join("fixtures", "lerna-with-invalid-workspaces")),
-  null,
-);
-
-assert.deepStrictEqual(findWorkspacesRoot(join("fixtures", "yarn-npm")), {
-  location: posixResolve("fixtures", "yarn-npm"),
-  globs: ["packages/*"],
-});
-
-assert.deepStrictEqual(
-  findWorkspacesRoot(join("fixtures", "yarn-npm-with-packages")),
-  {
-    location: posixResolve("fixtures", "yarn-npm-with-packages"),
-    globs: ["packages/*"],
-  },
-);
-
-assert.deepStrictEqual(
-  findWorkspacesRoot(join("fixtures", "yarn-npm", "packages", "a", "b")),
-  {
-    location: posixResolve("fixtures", "yarn-npm"),
-    globs: ["packages/*"],
-  },
-);
-
-assert.deepStrictEqual(
-  findWorkspacesRoot(posixResolve("fixtures", "yarn-npm")),
-  {
-    location: posixResolve("fixtures", "yarn-npm"),
-    globs: ["packages/*"],
-  },
-);
-
-const cache = createWorkspacesCache();
-const options = { cache, stopDir: "." };
-
-assert.deepStrictEqual(findWorkspacesRoot(join("fixtures", "bolt"), options), {
-  location: posixResolve("fixtures", "bolt"),
-  globs: ["packages/**/*"],
+import { createWorkspacesCache, findWorkspacesRoot } from "../src";
+
+describe("findWorkspacesRoot", () => {
+  it("returns root for yarn/npm", () => {
+    assert.deepStrictEqual(findWorkspacesRoot("fixtures/yarn-npm/foo/bar"), {
+      location: posixResolve("fixtures/yarn-npm"),
+      globs: ["packages/*"],
+    });
+  });
+
+  it("returns root for yarn/npm with packages", () => {
+    assert.deepStrictEqual(
+      findWorkspacesRoot("fixtures/yarn-npm-with-packages"),
+      {
+        location: posixResolve("fixtures/yarn-npm-with-packages"),
+        globs: ["packages/*"],
+      },
+    );
+  });
+
+  it("returns root for lerna", () => {
+    assert.deepStrictEqual(findWorkspacesRoot("fixtures/lerna"), {
+      location: posixResolve("fixtures/lerna"),
+      globs: ["packages/*"],
+    });
+  });
+
+  it("returns root for lerna with packages", () => {
+    assert.deepStrictEqual(findWorkspacesRoot("fixtures/lerna-with-packages"), {
+      location: posixResolve("fixtures/lerna-with-packages"),
+      globs: ["packages/*"],
+    });
+  });
+
+  it("returns root for bolt", () => {
+    assert.deepStrictEqual(findWorkspacesRoot("fixtures/bolt"), {
+      location: posixResolve("fixtures/bolt"),
+      globs: ["packages/**/*"],
+    });
+  });
+
+  it("returns null for lerna with invalid packages", () => {
+    assert.strictEqual(
+      findWorkspacesRoot("fixtures/lerna-with-invalid-packages"),
+      null,
+    );
+  });
+
+  it("returns null for lerna with invalid workspaces", () => {
+    assert.strictEqual(
+      findWorkspacesRoot("fixtures/lerna-with-invalid-workspaces"),
+      null,
+    );
+  });
+
+  it("stops searching at stop dir", () => {
+    assert.deepStrictEqual(
+      findWorkspacesRoot("fixtures/bolt/packages/a", {
+        stopDir: "fixtures/bolt/packages",
+      }),
+      null,
+    );
+  });
+
+  it("fills cache", () => {
+    const cache = createWorkspacesCache();
+    const options = { cache, stopDir: "." };
+
+    assert.deepStrictEqual(findWorkspacesRoot("fixtures/bolt", options), {
+      location: posixResolve("fixtures/bolt"),
+      globs: ["packages/**/*"],
+    });
+
+    assert.deepStrictEqual(findWorkspacesRoot("fixtures/bolt", options), {
+      location: posixResolve("fixtures/bolt"),
+      globs: ["packages/**/*"],
+    });
+
+    assert.strictEqual(
+      findWorkspacesRoot("fixtures/lerna-with-invalid-packages", options),
+      null,
+    );
+
+    assert.strictEqual(
+      findWorkspacesRoot("fixtures/lerna-with-invalid-packages", options),
+      null,
+    );
+
+    assert.deepStrictEqual(
+      cache.root,
+      new Map([
+        [
+          resolve("fixtures/bolt"),
+          {
+            location: posixResolve("fixtures/bolt"),
+            globs: ["packages/**/*"],
+          },
+        ],
+        [resolve("fixtures"), null],
+      ]),
+    );
+
+    assert.deepStrictEqual(cache.workspaces, new Map());
+
+    cache.clear();
+
+    assert.deepStrictEqual(cache.root, new Map());
+    assert.deepStrictEqual(cache.workspaces, new Map());
+  });
+
+  it("returns root from cache", () => {
+    const cache = createWorkspacesCache();
+    const options = { cache, stopDir: "." };
+
+    const root = {
+      location: posixResolve("fixtures/bolt"),
+      globs: ["packages/**/*"],
+    };
+
+    cache.root.set(resolve("fixtures/bolt"), root);
+
+    assert.strictEqual(findWorkspacesRoot("fixtures/bolt/foo", options), root);
+    assert.strictEqual(findWorkspacesRoot("fixtures/bolt", options), root);
+  });
 });
-
-assert.deepStrictEqual(findWorkspacesRoot(join("fixtures", "bolt"), options), {
-  location: posixResolve("fixtures", "bolt"),
-  globs: ["packages/**/*"],
-});
-
-assert.strictEqual(
-  findWorkspacesRoot(join("fixtures", "lerna-with-invalid-packages"), options),
-  null,
-);
-
-assert.strictEqual(
-  findWorkspacesRoot(join("fixtures", "lerna-with-invalid-packages"), options),
-  null,
-);
-
-assert.deepStrictEqual(
-  cache.root,
-  new Map([
-    [
-      resolve("fixtures", "bolt"),
-      { location: posixResolve("fixtures", "bolt"), globs: ["packages/**/*"] },
-    ],
-    [resolve("fixtures"), null],
-  ]),
-);
-
-assert.deepStrictEqual(cache.workspaces, new Map());
-
-cache.clear();
-
-assert.deepStrictEqual(cache.root, new Map());
-assert.deepStrictEqual(cache.workspaces, new Map());
diff --git a/tests/findWorkspaces.test.ts b/tests/findWorkspaces.test.ts
index 0017f77..3253c89 100644
--- a/tests/findWorkspaces.test.ts
+++ b/tests/findWorkspaces.test.ts
@@ -1,319 +1,261 @@
-import assert from "assert";
-import { join, resolve } from "path";
+import assert from "node:assert";
+import { describe, it } from "node:test";
+import { resolve } from "node:path";
 import { posixResolve } from "./posixResolve";
-import { createWorkspacesCache, findWorkspaces } from "../index";
+import { createWorkspacesCache, findWorkspaces } from "../src";
 
-assert.strictEqual(findWorkspaces(), null);
-
-assert.deepStrictEqual(findWorkspaces(join("fixtures", "bolt")), [
-  {
-    location: posixResolve("fixtures", "bolt", "packages", "a"),
-    package: { name: "@bolt/a", private: true },
-  },
-  {
-    location: posixResolve("fixtures", "bolt", "packages", "b"),
-    package: { name: "@bolt/b", private: true },
-  },
-]);
-
-assert.deepStrictEqual(
-  findWorkspaces(join("fixtures", "lerna-with-packages")),
-  [
-    {
-      location: posixResolve(
-        "fixtures",
-        "lerna-with-packages",
-        "packages",
-        "a",
-      ),
-      package: { name: "@lerna-with-packages/a", private: true },
-    },
-    {
-      location: posixResolve(
-        "fixtures",
-        "lerna-with-packages",
-        "packages",
-        "b",
-      ),
-      package: { name: "@lerna-with-packages/b", private: true },
-    },
-  ],
-);
-
-assert.strictEqual(
-  findWorkspaces(join("fixtures", "lerna-with-invalid-packages")),
-  null,
-);
-
-assert.deepStrictEqual(findWorkspaces(join("fixtures", "lerna")), [
-  {
-    location: posixResolve("fixtures", "lerna", "packages", "a"),
-    package: { name: "@lerna/a", private: true },
-  },
-  {
-    location: posixResolve("fixtures", "lerna", "packages", "b"),
-    package: { name: "@lerna/b", private: true },
-  },
-]);
+describe("findWorkspaces", () => {
+  it("returns workspaces for yarn/npm", () => {
+    assert.deepStrictEqual(findWorkspaces("fixtures/yarn-npm/foo/bar"), [
+      {
+        location: posixResolve("fixtures/yarn-npm/packages/a"),
+        package: { name: "@yarn-npm/a", private: true },
+      },
+      {
+        location: posixResolve("fixtures/yarn-npm/packages/b"),
+        package: { name: "@yarn-npm/b", private: true },
+      },
+    ]);
+  });
 
-assert.strictEqual(
-  findWorkspaces(join("fixtures", "lerna-with-invalid-workspaces")),
-  null,
-);
+  it("returns workspaces for yarn/npm with packages", () => {
+    assert.deepStrictEqual(findWorkspaces("fixtures/yarn-npm-with-packages"), [
+      {
+        location: posixResolve("fixtures/yarn-npm-with-packages/packages/a"),
+        package: { name: "@yarn-npm-with-packages/a", private: true },
+      },
+      {
+        location: posixResolve("fixtures/yarn-npm-with-packages/packages/b"),
+        package: { name: "@yarn-npm-with-packages/b", private: true },
+      },
+    ]);
+  });
 
-assert.deepStrictEqual(
-  findWorkspaces(join("fixtures", "lerna-with-invalid-lerna-json")),
-  null,
-);
+  it("returns workspaces for pnpm", () => {
+    assert.deepStrictEqual(findWorkspaces("fixtures/pnpm"), [
+      {
+        location: posixResolve("fixtures/pnpm/packages/a"),
+        package: { name: "@pnpm/a", private: true },
+      },
+      {
+        location: posixResolve("fixtures/pnpm/packages/b"),
+        package: { name: "@pnpm/b", private: true },
+      },
+      {
+        location: posixResolve("fixtures/pnpm/components/a"),
+        package: { name: "@pnpm/component-a", private: true },
+      },
+      {
+        location: posixResolve("fixtures/pnpm/components/b"),
+        package: { name: "@pnpm/component-b", private: true },
+      },
+      {
+        location: posixResolve("fixtures/pnpm/components/nested/component"),
+        package: { name: "@pnpm/nested-component", private: true },
+      },
+    ]);
+  });
 
-assert.strictEqual(
-  findWorkspaces(join("fixtures", "yarn-npm-with-invalid-package-json")),
-  null,
-);
+  it("returns workspaces for pnpm with defaults", () => {
+    assert.deepStrictEqual(findWorkspaces("fixtures/pnpm-with-defaults"), [
+      {
+        location: posixResolve("fixtures/pnpm-with-defaults/components/a"),
+        package: { name: "@pnpm/component-a", private: true },
+      },
+      {
+        location: posixResolve("fixtures/pnpm-with-defaults/components/b"),
+        package: { name: "@pnpm/component-b", private: true },
+      },
+      {
+        location: posixResolve("fixtures/pnpm-with-defaults/packages/a"),
+        package: { name: "@pnpm/a", private: true },
+      },
+      {
+        location: posixResolve("fixtures/pnpm-with-defaults/packages/b"),
+        package: { name: "@pnpm/b", private: true },
+      },
+    ]);
+  });
 
-assert.strictEqual(
-  findWorkspaces(join("fixtures", "yarn-npm-with-invalid-workspaces")),
-  null,
-);
+  it("returns workspaces for lerna", () => {
+    assert.deepStrictEqual(findWorkspaces("fixtures/lerna"), [
+      {
+        location: posixResolve("fixtures/lerna/packages/a"),
+        package: { name: "@lerna/a", private: true },
+      },
+      {
+        location: posixResolve("fixtures/lerna/packages/b"),
+        package: { name: "@lerna/b", private: true },
+      },
+    ]);
+  });
 
-assert.deepStrictEqual(findWorkspaces(join("fixtures", "pnpm")), [
-  {
-    location: posixResolve("fixtures", "pnpm", "packages", "a"),
-    package: { name: "@pnpm/a", private: true },
-  },
-  {
-    location: posixResolve("fixtures", "pnpm", "packages", "b"),
-    package: { name: "@pnpm/b", private: true },
-  },
-  {
-    location: posixResolve("fixtures", "pnpm", "components", "a"),
-    package: { name: "@pnpm/component-a", private: true },
-  },
-  {
-    location: posixResolve("fixtures", "pnpm", "components", "b"),
-    package: { name: "@pnpm/component-b", private: true },
-  },
-  {
-    location: posixResolve(
-      "fixtures",
-      "pnpm",
-      "components",
-      "nested",
-      "component",
-    ),
-    package: { name: "@pnpm/nested-component", private: true },
-  },
-]);
-assert.deepStrictEqual(findWorkspaces(join("fixtures", "pnpm-with-defaults")), [
-  {
-    location: posixResolve("fixtures", "pnpm-with-defaults", "components", "a"),
-    package: { name: "@pnpm/component-a", private: true },
-  },
-  {
-    location: posixResolve("fixtures", "pnpm-with-defaults", "components", "b"),
-    package: { name: "@pnpm/component-b", private: true },
-  },
-  {
-    location: posixResolve("fixtures", "pnpm-with-defaults", "packages", "a"),
-    package: { name: "@pnpm/a", private: true },
-  },
-  {
-    location: posixResolve("fixtures", "pnpm-with-defaults", "packages", "b"),
-    package: { name: "@pnpm/b", private: true },
-  },
-]);
+  it("returns workspaces for lerna with packages", () => {
+    assert.deepStrictEqual(findWorkspaces("fixtures/lerna-with-packages"), [
+      {
+        location: posixResolve("fixtures/lerna-with-packages/packages/a"),
+        package: { name: "@lerna-with-packages/a", private: true },
+      },
+      {
+        location: posixResolve("fixtures/lerna-with-packages/packages/b"),
+        package: { name: "@lerna-with-packages/b", private: true },
+      },
+    ]);
+  });
 
-assert.deepStrictEqual(findWorkspaces(join("fixtures", "yarn-npm")), [
-  {
-    location: posixResolve("fixtures", "yarn-npm", "packages", "a"),
-    package: { name: "@yarn-npm/a", private: true },
-  },
-  {
-    location: posixResolve("fixtures", "yarn-npm", "packages", "b"),
-    package: { name: "@yarn-npm/b", private: true },
-  },
-]);
+  it("returns workspaces for bolt", () => {
+    assert.deepStrictEqual(findWorkspaces("fixtures/bolt"), [
+      {
+        location: posixResolve("fixtures/bolt/packages/a"),
+        package: { name: "@bolt/a", private: true },
+      },
+      {
+        location: posixResolve("fixtures/bolt/packages/b"),
+        package: { name: "@bolt/b", private: true },
+      },
+    ]);
+  });
 
-assert.deepStrictEqual(
-  findWorkspaces(join("fixtures", "yarn-npm-with-packages")),
-  [
-    {
-      location: posixResolve(
-        "fixtures",
-        "yarn-npm-with-packages",
-        "packages",
-        "a",
-      ),
-      package: { name: "@yarn-npm-with-packages/a", private: true },
-    },
-    {
-      location: posixResolve(
-        "fixtures",
-        "yarn-npm-with-packages",
-        "packages",
-        "b",
-      ),
-      package: { name: "@yarn-npm-with-packages/b", private: true },
-    },
-  ],
-);
+  it("returns null for cwd", () => {
+    assert.strictEqual(findWorkspaces(), null);
+  });
 
-assert.deepStrictEqual(
-  findWorkspaces(join("fixtures", "yarn-npm", "packages", "a", "b")),
-  [
-    {
-      location: posixResolve("fixtures", "yarn-npm", "packages", "a"),
-      package: { name: "@yarn-npm/a", private: true },
-    },
-    {
-      location: posixResolve("fixtures", "yarn-npm", "packages", "b"),
-      package: { name: "@yarn-npm/b", private: true },
-    },
-  ],
-);
+  it("returns null for yarn/npm with invalid package.json", () => {
+    assert.strictEqual(
+      findWorkspaces("fixtures/yarn-npm-with-invalid-package-json"),
+      null,
+    );
+  });
 
-assert.deepStrictEqual(findWorkspaces(posixResolve("fixtures", "yarn-npm")), [
-  {
-    location: posixResolve("fixtures", "yarn-npm", "packages", "a"),
-    package: { name: "@yarn-npm/a", private: true },
-  },
-  {
-    location: posixResolve("fixtures", "yarn-npm", "packages", "b"),
-    package: { name: "@yarn-npm/b", private: true },
-  },
-]);
+  it("returns null for yarn/npm with invalid workspaces", () => {
+    assert.strictEqual(
+      findWorkspaces("fixtures/yarn-npm-with-invalid-workspaces"),
+      null,
+    );
+  });
 
-const cache = createWorkspacesCache();
+  it("returns null for lerna with invalid packages", () => {
+    assert.strictEqual(
+      findWorkspaces("fixtures/lerna-with-invalid-packages"),
+      null,
+    );
+  });
 
-assert.deepStrictEqual(
-  findWorkspaces(posixResolve("fixtures", "lerna-with-packages", "foo"), {
-    cache,
-  }),
-  [
-    {
-      location: posixResolve(
-        "fixtures",
-        "lerna-with-packages",
-        "packages",
-        "a",
-      ),
-      package: { name: "@lerna-with-packages/a", private: true },
-    },
-    {
-      location: posixResolve(
-        "fixtures",
-        "lerna-with-packages",
-        "packages",
-        "b",
-      ),
-      package: { name: "@lerna-with-packages/b", private: true },
-    },
-  ],
-);
+  it("returns null for lerna with invalid workspaces", () => {
+    assert.strictEqual(
+      findWorkspaces("fixtures/lerna-with-invalid-workspaces"),
+      null,
+    );
+  });
 
-assert.deepStrictEqual(
-  findWorkspaces(posixResolve("fixtures", "lerna-with-packages", "bar"), {
-    cache,
-  }),
-  [
-    {
-      location: posixResolve(
-        "fixtures",
-        "lerna-with-packages",
-        "packages",
-        "a",
-      ),
-      package: { name: "@lerna-with-packages/a", private: true },
-    },
-    {
-      location: posixResolve(
-        "fixtures",
-        "lerna-with-packages",
-        "packages",
-        "b",
-      ),
-      package: { name: "@lerna-with-packages/b", private: true },
-    },
-  ],
-);
+  it("returns null for lerna with invalid lerna.json", () => {
+    assert.deepStrictEqual(
+      findWorkspaces("fixtures/lerna-with-invalid-lerna-json"),
+      null,
+    );
+  });
 
-assert.deepStrictEqual(
-  findWorkspaces(posixResolve("fixtures", "lerna"), { cache }),
-  [
-    {
-      location: posixResolve("fixtures", "lerna", "packages", "a"),
-      package: { name: "@lerna/a", private: true },
-    },
-    {
-      location: posixResolve("fixtures", "lerna", "packages", "b"),
-      package: { name: "@lerna/b", private: true },
-    },
-  ],
-);
+  it("fills cache", () => {
+    const cache = createWorkspacesCache();
 
-assert.deepStrictEqual(
-  cache.root,
-  new Map([
-    [
-      resolve("fixtures", "lerna-with-packages"),
+    assert.deepStrictEqual(findWorkspaces("fixtures/lerna", { cache }), [
       {
-        globs: ["packages/*"],
-        location: posixResolve("fixtures", "lerna-with-packages"),
+        location: posixResolve("fixtures/lerna/packages/a"),
+        package: { name: "@lerna/a", private: true },
       },
-    ],
-    [
-      resolve("fixtures", "lerna"),
       {
-        globs: ["packages/*"],
-        location: posixResolve("fixtures", "lerna"),
+        location: posixResolve("fixtures/lerna/packages/b"),
+        package: { name: "@lerna/b", private: true },
       },
-    ],
-  ]),
-);
+    ]);
 
-assert.deepStrictEqual(
-  cache.workspaces,
-  new Map([
-    [
-      posixResolve("fixtures", "lerna-with-packages"),
+    assert.deepStrictEqual(
+      findWorkspaces("fixtures/lerna-with-packages/foo", {
+        cache,
+      }),
       [
         {
-          location: posixResolve(
-            "fixtures",
-            "lerna-with-packages",
-            "packages",
-            "a",
-          ),
+          location: posixResolve("fixtures/lerna-with-packages/packages/a"),
           package: { name: "@lerna-with-packages/a", private: true },
         },
         {
-          location: posixResolve(
-            "fixtures",
-            "lerna-with-packages",
-            "packages",
-            "b",
-          ),
+          location: posixResolve("fixtures/lerna-with-packages/packages/b"),
           package: { name: "@lerna-with-packages/b", private: true },
         },
       ],
-    ],
-    [
-      posixResolve("fixtures", "lerna"),
+    );
+
+    assert.deepStrictEqual(
+      findWorkspaces("fixtures/lerna-with-packages/bar", {
+        cache,
+      }),
       [
         {
-          location: posixResolve("fixtures", "lerna", "packages", "a"),
-          package: { name: "@lerna/a", private: true },
+          location: posixResolve("fixtures/lerna-with-packages/packages/a"),
+          package: { name: "@lerna-with-packages/a", private: true },
         },
         {
-          location: posixResolve("fixtures", "lerna", "packages", "b"),
-          package: { name: "@lerna/b", private: true },
+          location: posixResolve("fixtures/lerna-with-packages/packages/b"),
+          package: { name: "@lerna-with-packages/b", private: true },
         },
       ],
-    ],
-  ]),
-);
+    );
+
+    assert.deepStrictEqual(
+      cache.root,
+      new Map([
+        [
+          resolve("fixtures/lerna-with-packages"),
+          {
+            globs: ["packages/*"],
+            location: posixResolve("fixtures/lerna-with-packages"),
+          },
+        ],
+        [
+          resolve("fixtures/lerna"),
+          {
+            globs: ["packages/*"],
+            location: posixResolve("fixtures/lerna"),
+          },
+        ],
+      ]),
+    );
+
+    assert.deepStrictEqual(
+      cache.workspaces,
+      new Map([
+        [
+          posixResolve("fixtures/lerna-with-packages"),
+          [
+            {
+              location: posixResolve("fixtures/lerna-with-packages/packages/a"),
+              package: { name: "@lerna-with-packages/a", private: true },
+            },
+            {
+              location: posixResolve("fixtures/lerna-with-packages/packages/b"),
+              package: { name: "@lerna-with-packages/b", private: true },
+            },
+          ],
+        ],
+        [
+          posixResolve("fixtures/lerna"),
+          [
+            {
+              location: posixResolve("fixtures/lerna/packages/a"),
+              package: { name: "@lerna/a", private: true },
+            },
+            {
+              location: posixResolve("fixtures/lerna/packages/b"),
+              package: { name: "@lerna/b", private: true },
+            },
+          ],
+        ],
+      ]),
+    );
 
-cache.clear();
+    cache.clear();
 
-assert.deepStrictEqual(cache.root, new Map());
-assert.deepStrictEqual(cache.workspaces, new Map());
+    assert.deepStrictEqual(cache.root, new Map());
+    assert.deepStrictEqual(cache.workspaces, new Map());
+  });
+});
diff --git a/tests/index.ts b/tests/index.ts
deleted file mode 100644
index 5b880ba..0000000
--- a/tests/index.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-import "./findRoot.test";
-import "./findWorkspaces.test";
diff --git a/tests/posixResolve.ts b/tests/posixResolve.ts
index 331ea7d..b07dd05 100644
--- a/tests/posixResolve.ts
+++ b/tests/posixResolve.ts
@@ -1,6 +1,4 @@
-import { posix, resolve, sep } from "path";
+import { posix, resolve, sep } from "node:path";
 
-export const posixResolve = (...segments: string[]) =>
-  resolve(...segments)
-    .split(sep)
-    .join(posix.sep);
+export const posixResolve = (path: string) =>
+  resolve(path).split(sep).join(posix.sep);
diff --git a/tsconfig.json b/tsconfig.json
index dcd43e8..a229d11 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "include": ["index.ts"],
+  "include": ["src/**/*.ts"],
   "compilerOptions": {
     "outDir": "dist",
     "declaration": true,