diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 310d871..c1c6f7a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,7 +19,7 @@ jobs:
                   yes | sudo dpkg -i ${{ runner.temp }}/tinygo_0.28.1_amd64.deb
 
             - run: npm run build
-            - run: pnpm run /test/
+            - run: pnpm run /^test:/
 
             - name: Package
               run: npm pack
diff --git a/package.json b/package.json
index 6f875b7..ceac81a 100644
--- a/package.json
+++ b/package.json
@@ -38,9 +38,11 @@
 		"patch": "git apply ./gofmt.patch",
 		"build": "tinygo build -o=gofmt.wasm -target=wasm -no-debug -stack-size=24kb ./src/lib.go",
 		"postbuild": "npm run gofmt && npm run patch",
-		"test:node": "node --test",
-		"test:deno": "deno test --allow-read"
+		"test:node": "node --test test_node",
+		"test:deno": "deno test test_deno --allow-read",
+		"test:bun": "bun test test_bun"
 	},
+	"packageManager": "pnpm@8.7.1",
 	"engines": {
 		"node": ">=16.17.0"
 	},
diff --git a/test_bun/bun.test.ts b/test_bun/bun.test.ts
new file mode 100644
index 0000000..d23715c
--- /dev/null
+++ b/test_bun/bun.test.ts
@@ -0,0 +1,47 @@
+import { expect, test } from "bun:test";
+import init, { format } from "../gofmt.js";
+import fs from "node:fs/promises";
+import path from "node:path";
+
+await init();
+
+async function* walk(dir: string): AsyncGenerator<string> {
+	for await (const d of await fs.readdir(dir)) {
+		const entry = path.join(dir, d);
+		const stat = await fs.stat(entry);
+
+		if (stat.isDirectory()) {
+			yield* walk(entry);
+		}
+
+		if (stat.isFile()) {
+			yield entry;
+		}
+	}
+}
+
+const test_root = Bun.fileURLToPath(new URL("../test_data", import.meta.url));
+
+for await (const input_path of walk(test_root)) {
+	const ext = path.extname(input_path);
+
+	switch (ext) {
+		case ".input":
+			break;
+
+		default:
+			continue;
+	}
+
+	const test_name = path.relative(test_root, input_path);
+	const [input, expected] = await Promise.all([
+		Bun.file(input_path).text(),
+		Bun.file(input_path.replace(ext, ".golden")).text(),
+	]);
+
+	const actual = format(input);
+
+	test(test_name, () => {
+		expect(actual).toBe(expected);
+	});
+}
diff --git a/test_node/test-node.mjs b/test_node/node.test.js
similarity index 71%
rename from test_node/test-node.mjs
rename to test_node/node.test.js
index 6737937..159197e 100644
--- a/test_node/test-node.mjs
+++ b/test_node/node.test.js
@@ -7,21 +7,14 @@ import { fileURLToPath } from "node:url";
 
 await init();
 
-/**
- * @param {string} dir
- * @returns {Generator<string>}
- */
-async function* walk(dir) {
-	for await (const d of await fs.opendir(dir)) {
-		const entry = path.join(dir, d.name);
-		if (d.isDirectory()) yield* walk(entry);
-		else if (d.isFile()) yield entry;
-	}
-}
-
 const test_root = fileURLToPath(new URL("../test_data", import.meta.url));
 
-for await (const input_path of walk(test_root)) {
+for await (const dirent of await fs.opendir(test_root, { recursive: true })) {
+	if (!dirent.isFile()) {
+		continue;
+	}
+
+	const input_path = dirent.path;
 	const ext = path.extname(input_path);
 
 	switch (ext) {