diff --git a/tests/bundle-decode.test.js b/tests/bundle-decode.test.js
new file mode 100644
index 0000000..6a559dc
--- /dev/null
+++ b/tests/bundle-decode.test.js
@@ -0,0 +1,29 @@
+const { deepEqual } = require('assert');
+const { describe, it } = require('node:test');
+const osc = require('../dist/index');
+
+const tests = [
+  {
+    description: 'simple contents single message',
+    expected: {
+      timeTag: [32, 0],
+      contents: [{ address: '/oscillator/4/frequency', args: [{ type: 'f', value: 440 }] }],
+    },
+    bundle: Buffer.concat([
+      Buffer.from('#bundle', 'ascii'),
+      Buffer.from([0x00]),
+      Buffer.from([0, 0, 0, 32, 0, 0, 0, 0]),
+      Buffer.from('00000020', 'hex'),
+      Buffer.from('2f6f7363696c6c61746f722f342f6672657175656e6379002c66000043dc0000', 'hex'),
+    ]),
+  },
+];
+
+describe('OSC Bundle Decoding', () => {
+  tests.forEach((bundleTest) => {
+    it(bundleTest.description, () => {
+      const encoded = osc.bundleFromBuffer(bundleTest.bundle);
+      deepEqual(encoded, bundleTest.expected);
+    });
+  });
+});
diff --git a/tests/bundle-encode.test.js b/tests/bundle-encode.test.js
new file mode 100644
index 0000000..2338cef
--- /dev/null
+++ b/tests/bundle-encode.test.js
@@ -0,0 +1,26 @@
+const { deepEqual, throws } = require('assert');
+const { describe, it } = require('node:test');
+const osc = require('../dist/index');
+
+const tests = [
+  {
+    description: 'simple contents single message',
+    bundle: { timeTag: [32, 0], contents: [{ address: '/oscillator/4/frequency', args: [{ type: 'f', value: 440 }] }] },
+    expected: Buffer.concat([
+      Buffer.from('#bundle', 'ascii'),
+      Buffer.from([0x00]),
+      Buffer.from([0, 0, 0, 32, 0, 0, 0, 0]),
+      Buffer.from('00000020', 'hex'),
+      Buffer.from('2f6f7363696c6c61746f722f342f6672657175656e6379002c66000043dc0000', 'hex'),
+    ]),
+  },
+];
+
+describe('OSC Bundle Encoding', () => {
+  tests.forEach((bundleTest) => {
+    it(bundleTest.description, () => {
+      const encoded = osc.bundleToBuffer(bundleTest.bundle);
+      deepEqual(encoded, bundleTest.expected);
+    });
+  });
+});