diff --git a/.github/workflows/codequality.yml b/.github/workflows/codequality.yml
index 02676e4..26c7d29 100644
--- a/.github/workflows/codequality.yml
+++ b/.github/workflows/codequality.yml
@@ -33,3 +33,12 @@ jobs:
         run: npm ci
       - name: Run eslint
         run: npm run lint
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install dependencies
+        run: npm ci
+      - name: Run tests
+        run: npm test
diff --git a/jsconfig.json b/jsconfig.json
index c92c1b4..03b65bb 100644
--- a/jsconfig.json
+++ b/jsconfig.json
@@ -2,7 +2,8 @@
 	"compilerOptions": {
 		"module": "ESNext",
 		"target": "ESNext",
-		"checkJs": true
+		"checkJs": true,
+		"moduleResolution": "nodenext"
 	},
-	"include": ["src/**/*.js"]
+	"include": ["src/**/*.js", "tests/**/*.js"]
 }
diff --git a/package-lock.json b/package-lock.json
index ce6c22c..82b06b9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,6 +15,7 @@
 				"eslint-config-prettier": "^8.8.0",
 				"npm-run-all": "^4.1.5",
 				"prettier": "^2.8.8",
+				"uvu": "^0.5.6",
 				"web-ext": "^7.6.2"
 			}
 		},
@@ -2073,6 +2074,24 @@
 				"node": ">=0.4.0"
 			}
 		},
+		"node_modules/dequal": {
+			"version": "2.0.3",
+			"resolved": "https://registry.npmjs.org/dequal/-/dequal-2.0.3.tgz",
+			"integrity": "sha512-0je+qPKHEMohvfRTCEo3CrPG6cAzAYgmzKyxRiYSSDkS6eGJdyVJm7WaYA5ECaAD9wLB2T4EEeymA5aFVcYXCA==",
+			"dev": true,
+			"engines": {
+				"node": ">=6"
+			}
+		},
+		"node_modules/diff": {
+			"version": "5.1.0",
+			"resolved": "https://registry.npmjs.org/diff/-/diff-5.1.0.tgz",
+			"integrity": "sha512-D+mk+qE8VC/PAUrlAU34N+VfXev0ghe5ywmpqrawphmVZc1bEfn56uo9qpyGp1p4xpzOHkSW4ztBd6L7Xx4ACw==",
+			"dev": true,
+			"engines": {
+				"node": ">=0.3.1"
+			}
+		},
 		"node_modules/doctrine": {
 			"version": "3.0.0",
 			"resolved": "https://registry.npmjs.org/doctrine/-/doctrine-3.0.0.tgz",
@@ -4202,6 +4221,15 @@
 				"json-buffer": "3.0.1"
 			}
 		},
+		"node_modules/kleur": {
+			"version": "4.1.5",
+			"resolved": "https://registry.npmjs.org/kleur/-/kleur-4.1.5.tgz",
+			"integrity": "sha512-o+NO+8WrRiQEE4/7nwRJhN1HWpVmJm511pBHUxPLtp0BUISzlBplORYSmTclCnJvQq2tKu/sgl3xVpkc7ZWuQQ==",
+			"dev": true,
+			"engines": {
+				"node": ">=6"
+			}
+		},
 		"node_modules/latest-version": {
 			"version": "7.0.0",
 			"resolved": "https://registry.npmjs.org/latest-version/-/latest-version-7.0.0.tgz",
@@ -4517,6 +4545,15 @@
 				"node": "*"
 			}
 		},
+		"node_modules/mri": {
+			"version": "1.2.0",
+			"resolved": "https://registry.npmjs.org/mri/-/mri-1.2.0.tgz",
+			"integrity": "sha512-tzzskb3bG8LvYGFF/mDTpq3jpI6Q9wc3LEmBaghu+DdCssd1FakN7Bc0hVNmEyGq1bq3RgfkCb3cmQLpNPOroA==",
+			"dev": true,
+			"engines": {
+				"node": ">=4"
+			}
+		},
 		"node_modules/ms": {
 			"version": "2.1.2",
 			"resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
@@ -5933,6 +5970,18 @@
 				"queue-microtask": "^1.2.2"
 			}
 		},
+		"node_modules/sade": {
+			"version": "1.8.1",
+			"resolved": "https://registry.npmjs.org/sade/-/sade-1.8.1.tgz",
+			"integrity": "sha512-xal3CZX1Xlo/k4ApwCFrHVACi9fBqJ7V+mwhBsuf/1IOKbBy098Fex+Wa/5QMubw09pSZ/u8EY8PWgevJsXp1A==",
+			"dev": true,
+			"dependencies": {
+				"mri": "^1.1.0"
+			},
+			"engines": {
+				"node": ">=6"
+			}
+		},
 		"node_modules/safe-buffer": {
 			"version": "5.2.1",
 			"resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
@@ -6768,6 +6817,24 @@
 				"uuid": "dist/bin/uuid"
 			}
 		},
+		"node_modules/uvu": {
+			"version": "0.5.6",
+			"resolved": "https://registry.npmjs.org/uvu/-/uvu-0.5.6.tgz",
+			"integrity": "sha512-+g8ENReyr8YsOc6fv/NVJs2vFdHBnBNdfE49rshrTzDWOlUx4Gq7KOS2GD8eqhy2j+Ejq29+SbKH8yjkAqXqoA==",
+			"dev": true,
+			"dependencies": {
+				"dequal": "^2.0.0",
+				"diff": "^5.0.0",
+				"kleur": "^4.0.3",
+				"sade": "^1.7.3"
+			},
+			"bin": {
+				"uvu": "bin.js"
+			},
+			"engines": {
+				"node": ">=8"
+			}
+		},
 		"node_modules/validate-npm-package-license": {
 			"version": "3.0.4",
 			"resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
diff --git a/package.json b/package.json
index 0a062ac..737ee6f 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,8 @@
 		"watch:webext": "web-ext run --keep-profile-changes --profile-create-if-missing --firefox-profile=.firefox-profile/",
 		"format": "prettier --write --ignore-path .gitignore .",
 		"package": "run-s -l build:**",
-		"lint": "eslint src/"
+		"lint": "eslint src/",
+		"test": "uvu tests/"
 	},
 	"devDependencies": {
 		"@sprout2000/esbuild-copy-plugin": "1.1.8",
@@ -17,6 +18,7 @@
 		"eslint-config-prettier": "^8.8.0",
 		"npm-run-all": "^4.1.5",
 		"prettier": "^2.8.8",
+		"uvu": "^0.5.6",
 		"web-ext": "^7.6.2"
 	},
 	"prettier": {
@@ -25,6 +27,7 @@
 		"useTabs": true,
 		"trailingComma": "all"
 	},
+	"type": "module",
 	"webExt": {
 		"sourceDir": "dist/"
 	},