diff --git a/package.json b/package.json
index 7eb8db9..df7ca4b 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,9 @@
     "prepublishOnly": "npm run build",
     "lint:check": "eslint ./src",
     "format:check": "prettier ./ --check",
-    "format:write": "prettier ./ --write"
+    "format:write": "prettier ./ --write",
+    "pretest": "npm run build",
+    "test": "node --test --experimental-test-coverage"
   },
   "files": [
     "dist"
diff --git a/tests/encode.test.js b/tests/encode.test.js
new file mode 100644
index 0000000..6c44db1
--- /dev/null
+++ b/tests/encode.test.js
@@ -0,0 +1,152 @@
+const { deepEqual, throws, equal } = require('assert');
+const { describe, it } = require('node:test');
+const { Encoders } = require('../dist/cjs/encoders');
+
+const goodTests = [
+  {
+    description: 'DataTrackerPosChunk',
+    expected: new Uint8Array([0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64]),
+    bytes: Encoders.DataTrackerPosChunk(1.0, 2.0, 3.0),
+  },
+  {
+    description: 'DataTrackerSpeedChunk',
+    expected: new Uint8Array([1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64]),
+    bytes: Encoders.DataTrackerSpeedChunk(1.0, 2.0, 3.0),
+  },
+  {
+    description: 'DataTrackerOriChunk',
+    expected: new Uint8Array([2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64]),
+    bytes: Encoders.DataTrackerOriChunk(1.0, 2.0, 3.0),
+  },
+  {
+    description: 'DataTrackerStatusChunk',
+    expected: new Uint8Array([3, 0, 4, 0, 0, 0, 128, 63]),
+    bytes: Encoders.DataTrackerStatusChunk(1.0),
+  },
+  {
+    description: 'DataTrackerAccelChunk',
+    expected: new Uint8Array([4, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64]),
+    bytes: Encoders.DataTrackerAccelChunk(1.0, 2.0, 3.0),
+  },
+  {
+    description: 'DataTrackerTrgtposChunk',
+    expected: new Uint8Array([5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64]),
+    bytes: Encoders.DataTrackerTrgtposChunk(1.0, 2.0, 3.0),
+  },
+  {
+    description: 'DataTrackerTimestampChunk',
+    expected: new Uint8Array([6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0]),
+    bytes: Encoders.DataTrackerTimestampChunk(1234567890n),
+  },
+  {
+    description: 'DataTrackerChunk',
+    expected: new Uint8Array([
+      1, 0, 100, 128, 0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0,
+      0, 64, 64, 2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0, 12, 0, 0, 0,
+      128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 6, 0, 8, 0, 210, 2,
+      150, 73, 0, 0, 0, 0,
+    ]),
+    bytes: Encoders.DataTrackerChunk(1, [
+      new Uint8Array([0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64]),
+      new Uint8Array([1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64]),
+      new Uint8Array([2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64]),
+      new Uint8Array([3, 0, 4, 0, 0, 0, 128, 63]),
+      new Uint8Array([4, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64]),
+      new Uint8Array([5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64]),
+      new Uint8Array([6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0]),
+    ]),
+  },
+  {
+    description: 'DataTrackerListChunk',
+    expected: new Uint8Array([
+      1, 0, 104, 128, 1, 0, 100, 128, 0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63,
+      0, 0, 0, 64, 0, 0, 64, 64, 2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0,
+      12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 6, 0, 8,
+      0, 210, 2, 150, 73, 0, 0, 0, 0,
+    ]),
+    bytes: Encoders.DataTrackerListChunk([
+      new Uint8Array([
+        1, 0, 100, 128, 0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64,
+        0, 0, 64, 64, 2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0, 12, 0, 0,
+        0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 6, 0, 8, 0, 210,
+        2, 150, 73, 0, 0, 0, 0,
+      ]),
+    ]),
+  },
+  {
+    description: 'DataPacketChunk',
+    expected: new Uint8Array([
+      85, 103, 124, 128, 0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123, 1, 0, 104, 128, 1, 0, 100, 128, 0, 0,
+      12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 2, 0, 12,
+      0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63, 4, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64,
+      0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 6, 0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+    ]),
+    bytes: Encoders.DataPacketChunk(
+      new Uint8Array([0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123]),
+      new Uint8Array([
+        1, 0, 104, 128, 1, 0, 100, 128, 0, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 1, 0, 12, 0, 0, 0, 128,
+        63, 0, 0, 0, 64, 0, 0, 64, 64, 2, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 3, 0, 4, 0, 0, 0, 128, 63,
+        4, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 5, 0, 12, 0, 0, 0, 128, 63, 0, 0, 0, 64, 0, 0, 64, 64, 6,
+        0, 8, 0, 210, 2, 150, 73, 0, 0, 0, 0,
+      ])
+    ),
+  },
+  {
+    description: 'InfoTrackerNameChunk',
+    expected: new Uint8Array([0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49]),
+    bytes: Encoders.InfoTrackerNameChunk('Tracker 1'),
+  },
+  {
+    description: 'InfoSystemNameChunk',
+    expected: new Uint8Array([1, 0, 10, 0, 80, 83, 78, 32, 83, 101, 114, 118, 101, 114]),
+    bytes: Encoders.InfoSystemNameChunk('PSN Server'),
+  },
+  {
+    description: 'InfoTrackerChunk',
+    expected: new Uint8Array([1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49]),
+    bytes: Encoders.InfoTrackerChunk(1, new Uint8Array([0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49])),
+  },
+  {
+    description: 'InfoTrackerListChunk',
+    expected: new Uint8Array([2, 0, 17, 128, 1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49]),
+    bytes: Encoders.InfoTrackerListChunk([
+      new Uint8Array([1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49]),
+    ]),
+  },
+  {
+    description: 'PacketHeaderChunk',
+    expected: new Uint8Array([0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123]),
+    bytes: Encoders.PacketHeaderChunk(1234567890n, 2, 3, 1, 123),
+  },
+  {
+    description: 'InfoPacketChunk',
+    expected: new Uint8Array([
+      86, 103, 51, 128, 0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123, 1, 0, 10, 0, 80, 83, 78, 32, 83, 101,
+      114, 118, 101, 114, 2, 0, 17, 128, 1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49,
+    ]),
+    bytes: Encoders.InfoPacketChunk(
+      new Uint8Array([0, 0, 12, 0, 210, 2, 150, 73, 0, 0, 0, 0, 2, 3, 1, 123]),
+      new Uint8Array([1, 0, 10, 0, 80, 83, 78, 32, 83, 101, 114, 118, 101, 114]),
+      new Uint8Array([2, 0, 17, 128, 1, 0, 13, 128, 0, 0, 9, 0, 84, 114, 97, 99, 107, 101, 114, 32, 49])
+    ),
+  },
+];
+
+describe('PSN Message Encoding', () => {
+  goodTests.forEach((messageTest) => {
+    it(messageTest.description, () => {
+      deepEqual(messageTest.bytes, messageTest.expected);
+    });
+  });
+});
+
+//TODO(jwetzell): add tests that handle errors
+const badTests = [];
+
+describe('PSN Message Encoding Throws', () => {
+  badTests.forEach((messageTest) => {
+    it(messageTest.description, () => {
+      throws(() => {}, messageTest.throwsMessage);
+    });
+  });
+});