diff --git a/test/fixtures/test.avif b/test/fixtures/test.avif
new file mode 100644
index 0000000..b0e6691
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diff --git a/test/fixtures/test.jpeg b/test/fixtures/test.jpeg
new file mode 100644
index 0000000..f9b7e07
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diff --git a/test/fixtures/test.jxl b/test/fixtures/test.jxl
new file mode 100644
index 0000000..0d7f469
Binary files /dev/null and b/test/fixtures/test.jxl differ
diff --git a/test/fixtures/test.png b/test/fixtures/test.png
new file mode 100644
index 0000000..ce3dcf2
Binary files /dev/null and b/test/fixtures/test.png differ
diff --git a/test/fixtures/test.webp b/test/fixtures/test.webp
new file mode 100644
index 0000000..eed315c
Binary files /dev/null and b/test/fixtures/test.webp differ
diff --git a/test/node/avif.test.js b/test/node/avif.test.js
new file mode 100644
index 0000000..338faad
--- /dev/null
+++ b/test/node/avif.test.js
@@ -0,0 +1,26 @@
+import test from 'ava';
+import { imageDataPolyfill, importWasmModule, getFixturesImage } from './utils.js';
+
+import decode, { init as initDecode } from '@jsquash/avif/decode.js';
+import encode, { init as initEncode } from '@jsquash/avif/encode.js';
+
+imageDataPolyfill();
+
+test('can successfully decode image', async t => {
+    const [testImage, decodeWasmModule] = await Promise.all([
+        getFixturesImage('test.avif'),
+        importWasmModule('node_modules/@jsquash/avif/codec/dec/avif_dec.wasm'),
+    ]);
+    initDecode(decodeWasmModule);
+    const data = await decode(testImage);
+    t.is(data.width, 50);
+    t.is(data.height, 50);
+    t.is(data.data.length, 4 * 50 * 50);
+});
+
+test('can successfully encode image', async t => {
+    const encodeWasmModule = await importWasmModule('node_modules/@jsquash/avif/codec/enc/avif_enc.wasm');
+    await initEncode(encodeWasmModule);
+    const data = await encode(new ImageData(new Uint8ClampedArray(4 * 50 * 50), 50, 50));
+    t.assert(data instanceof ArrayBuffer);
+});
diff --git a/test/node/jpeg.test.js b/test/node/jpeg.test.js
new file mode 100644
index 0000000..2a703f5
--- /dev/null
+++ b/test/node/jpeg.test.js
@@ -0,0 +1,26 @@
+import test from 'ava';
+import { imageDataPolyfill, importWasmModule, getFixturesImage } from './utils.js';
+
+import decode, { init as initDecode } from '@jsquash/jpeg/decode.js';
+import encode, { init as initEncode } from '@jsquash/jpeg/encode.js';
+
+imageDataPolyfill();
+
+test('can successfully decode image', async t => {
+    const [testImage, decodeWasmModule] = await Promise.all([
+        getFixturesImage('test.jpeg'),
+        importWasmModule('node_modules/@jsquash/jpeg/codec/dec/mozjpeg_dec.wasm'),
+    ]);
+    initDecode(decodeWasmModule);
+    const data = await decode(testImage);
+    t.is(data.width, 50);
+    t.is(data.height, 50);
+    t.is(data.data.length, 4 * 50 * 50);
+});
+
+test('can successfully encode image', async t => {
+    const encodeWasmModule = await importWasmModule('node_modules/@jsquash/jpeg/codec/enc/mozjpeg_enc.wasm');
+    await initEncode(encodeWasmModule);
+    const data = await encode(new ImageData(new Uint8ClampedArray(4 * 50 * 50), 50, 50));
+    t.assert(data instanceof ArrayBuffer);
+});
diff --git a/test/node/jxl.test.js b/test/node/jxl.test.js
new file mode 100644
index 0000000..79e77e6
--- /dev/null
+++ b/test/node/jxl.test.js
@@ -0,0 +1,26 @@
+import test from 'ava';
+import { imageDataPolyfill, importWasmModule, getFixturesImage } from './utils.js';
+
+import decode, { init as initDecode } from '@jsquash/jxl/decode.js';
+import encode, { init as initEncode } from '@jsquash/jxl/encode.js';
+
+imageDataPolyfill();
+
+test('can successfully decode image', async t => {
+    const [testImage, decodeWasmModule] = await Promise.all([
+        getFixturesImage('test.jxl'),
+        importWasmModule('node_modules/@jsquash/jxl/codec/dec/jxl_dec.wasm'),
+    ]);
+    initDecode(decodeWasmModule);
+    const data = await decode(testImage);
+    t.is(data.width, 50);
+    t.is(data.height, 50);
+    t.is(data.data.length, 4 * 50 * 50);
+});
+
+test('can successfully encode image', async t => {
+    const encodeWasmModule = await importWasmModule('node_modules/@jsquash/jxl/codec/enc/jxl_enc.wasm');
+    await initEncode(encodeWasmModule);
+    const data = await encode(new ImageData(new Uint8ClampedArray(4 * 50 * 50), 50, 50));
+    t.assert(data instanceof ArrayBuffer);
+});
diff --git a/test/node/png.test.js b/test/node/png.test.js
new file mode 100644
index 0000000..9f8e873
--- /dev/null
+++ b/test/node/png.test.js
@@ -0,0 +1,27 @@
+import test from 'ava';
+import { imageDataPolyfill, importWasmModule, getFixturesImage } from './utils.js';
+
+import decode, { init as initDecode } from '@jsquash/png/decode.js';
+import encode, { init as initEncode } from '@jsquash/png/encode.js';
+
+imageDataPolyfill();
+
+test('can successfully decode image', async t => {
+    const [testImage, decodeWasmModule] = await Promise.all([
+        getFixturesImage('test.png'),
+        importWasmModule('node_modules/@jsquash/png/codec/squoosh_png_bg.wasm'),
+    ]);
+    initDecode(decodeWasmModule);
+    const data = await decode(testImage);
+    t.is(data.width, 50);
+    t.is(data.height, 50);
+    t.is(data.data.length, 4 * 50 * 50);
+});
+
+test('can successfully encode image', async t => {
+    const encodeWasmModule = await importWasmModule('node_modules/@jsquash/png/codec/squoosh_png_bg.wasm');
+    await initEncode(encodeWasmModule);
+    const data = await encode(new ImageData(new Uint8ClampedArray(4 * 50 * 50), 50, 50));
+    // @TODO Next breaking change, make PNG encode return an ArrayBuffer to match other packages
+    t.assert(!(data instanceof ArrayBuffer));
+});
diff --git a/test/node/utils.js b/test/node/utils.js
new file mode 100644
index 0000000..d7e3dbb
--- /dev/null
+++ b/test/node/utils.js
@@ -0,0 +1,24 @@
+import { promises as fs } from 'fs';
+import path from 'path';
+
+export function imageDataPolyfill() {
+  if (typeof ImageData === 'undefined') {
+    globalThis.ImageData = class ImageData {
+      constructor(data, width, height) {
+        this.data = data;
+        this.width = width;
+        this.height = height;
+      }
+    };
+  }
+}
+
+export async function importWasmModule(path) {
+  const fileBuffer = await fs.readFile(path);
+  return WebAssembly.compile(fileBuffer);
+}
+
+export function getFixturesImage(imagePath) {
+  const filePath = path.resolve(`fixtures/${imagePath}`);
+  return fs.readFile(filePath);
+}
diff --git a/test/node/webp.test.js b/test/node/webp.test.js
new file mode 100644
index 0000000..437160b
--- /dev/null
+++ b/test/node/webp.test.js
@@ -0,0 +1,26 @@
+import test from 'ava';
+import { imageDataPolyfill, importWasmModule, getFixturesImage } from './utils.js';
+
+import decode, { init as initDecode } from '@jsquash/webp/decode.js';
+import encode, { init as initEncode } from '@jsquash/webp/encode.js';
+
+imageDataPolyfill();
+
+test('can successfully decode image', async t => {
+    const [testImage, decodeWasmModule] = await Promise.all([
+        getFixturesImage('test.webp'),
+        importWasmModule('node_modules/@jsquash/webp/codec/dec/webp_dec.wasm'),
+    ]);
+    initDecode(decodeWasmModule);
+    const data = await decode(testImage);
+    t.is(data.width, 50);
+    t.is(data.height, 50);
+    t.is(data.data.length, 4 * 50 * 50);
+});
+
+test('can successfully encode image', async t => {
+    const encodeWasmModule = await importWasmModule('node_modules/@jsquash/webp/codec/enc/webp_enc.wasm');
+    await initEncode(encodeWasmModule);
+    const data = await encode(new ImageData(new Uint8ClampedArray(4 * 50 * 50), 50, 50));
+    t.assert(data instanceof ArrayBuffer);
+});
diff --git a/test/package.json b/test/package.json
new file mode 100644
index 0000000..7639ddf
--- /dev/null
+++ b/test/package.json
@@ -0,0 +1,18 @@
+{
+  "name": "integration-tests",
+  "scripts": {
+    "test": "ava node/*.test.js"
+  },
+  "devDependencies": {
+    "ava": "^5.3.1",
+    "@jsquash/avif": "file:../packages/avif/dist",
+    "@jsquash/jpeg": "file:../packages/jpeg/dist",
+    "@jsquash/jxl": "file:../packages/jxl/dist",
+    "@jsquash/oxipng": "file:../packages/oxipng/dist",
+    "@jsquash/png": "file:../packages/png/dist",
+    "@jsquash/resize": "file:../packages/resize/dist",
+    "@jsquash/webp": "file:../packages/webp/dist"
+  },
+  "private": true,
+  "type": "module"
+}