diff --git a/.eslintrc.json b/.eslintrc.json
index 4db51ca..3de38b4 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -39,7 +39,8 @@
       },
       "rules": {
         "max-len": "off",
-        "prefer-arrow-callback": "off"
+        "prefer-arrow-callback": "off",
+        "no-return-assign": "off"
       }
     }
   ],
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..a6d167d
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,44 @@
+name: Build
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Setup
+      uses: actions/setup-node@v3
+      with:
+        node-version: 20.x
+
+    - name: Install tools
+      run: npm install --location=global bslint
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Lint
+      run: npm run lint
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Setup
+      uses: actions/setup-node@v3
+      with:
+        node-version: 20.x
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Test
+      run: npm run test
+
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..b6ebf8c
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,43 @@
+{
+  "name": "bmutex",
+  "version": "0.1.6",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "bmutex",
+      "version": "0.1.6",
+      "license": "MIT",
+      "dependencies": {
+        "bsert": "~0.0.10"
+      },
+      "devDependencies": {
+        "bmocha": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    },
+    "node_modules/bmocha": {
+      "version": "2.1.8",
+      "resolved": "https://registry.npmjs.org/bmocha/-/bmocha-2.1.8.tgz",
+      "integrity": "sha512-bog23Ckl9lRyBxrsi4FmX1rTz4d1WhHRpIA+q2lpoiXmNuroMHr1JUOU5sPiMZwvhLCxqffvWv3xCJC7PC126w==",
+      "dev": true,
+      "bin": {
+        "_bmocha": "bin/_bmocha",
+        "bmocha": "bin/bmocha"
+      },
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    },
+    "node_modules/bsert": {
+      "version": "0.0.12",
+      "resolved": "https://registry.npmjs.org/bsert/-/bsert-0.0.12.tgz",
+      "integrity": "sha512-lUB0EMu4KhIf+VQ6RZJ7J3dFdohYSeta+gNgDi00Hi/t3k/W6xZlwm9PSSG0q7hJ2zW9Rsn5yaMPymETxroTRw==",
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
index 3f9a6d1..01d74b6 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
   "author": "Christopher Jeffrey <chjjeffrey@gmail.com>",
   "main": "./lib/bmutex.js",
   "scripts": {
-    "lint": "eslint lib/ test/ || exit 0",
+    "lint": "eslint lib/ test/",
     "test": "bmocha --reporter spec test/*-test.js"
   },
   "dependencies": {
diff --git a/test/.gitkeep b/test/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/test/lock-test.js b/test/lock-test.js
new file mode 100644
index 0000000..35d6f95
--- /dev/null
+++ b/test/lock-test.js
@@ -0,0 +1,41 @@
+'use strict';
+
+const assert = require('bsert');
+const {Lock} = require('..');
+
+describe('Lock', function() {
+  it('should resolve queue in order', async () => {
+    const genJob = (id) => {
+      return new Promise((resolve) => {
+        setTimeout(() => {
+          resolve(id);
+        }, randomRange(10, 100));
+      });
+    };
+
+    const locker = new Lock();
+    const results = [];
+    const promises = [];
+
+    const runJob = async (id) => {
+      const unlock = await locker.lock();
+
+      try {
+        results.push(await genJob(id));
+      } finally {
+        unlock();
+      }
+    };
+
+    for (let i = 0; i < 10; i++)
+      promises.push(runJob(i));
+
+    await Promise.all(promises);
+
+    assert.deepStrictEqual(results, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
+  });
+});
+
+function randomRange(min, max) {
+  return Math.floor(Math.random() * (max - min) + min);
+}