diff --git a/package.json b/package.json
index c8a7116..208da75 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
     "main": "index.js",
     "types": "index.d.ts",
     "scripts": {
-        "test": "echo \"Error: no test specified\" && exit 1",
+        "test": "npm run build && node --test",
         "build": "tsc -p .",
         "build:pub": "tsc -p ./tsconfig.pub.json",
         "build:clean": "git clean -dfx -e node_modules -e .vscode",
diff --git a/test/base32.test.cjs b/test/base32.test.cjs
new file mode 100644
index 0000000..cd58159
--- /dev/null
+++ b/test/base32.test.cjs
@@ -0,0 +1,26 @@
+const assert = require('node:assert/strict');
+const { describe, it } = require('node:test');
+
+const { base32Encode } = require('../build/utils/base32.js');
+
+describe('base32Encode', () => {
+    it('encodes empty buffers without padding', () => {
+        assert.equal(base32Encode(Buffer.alloc(0)), '');
+    });
+
+    it('encodes RFC 4648 test vectors', () => {
+        const vectors = [
+            ['', ''],
+            ['f', 'MY======'],
+            ['fo', 'MZXQ===='],
+            ['foo', 'MZXW6==='],
+            ['foob', 'MZXW6YQ='],
+            ['fooba', 'MZXW6YTB'],
+            ['foobar', 'MZXW6YTBOI======'],
+        ];
+
+        for (const [input, expected] of vectors) {
+            assert.equal(base32Encode(Buffer.from(input, 'utf8')), expected);
+        }
+    });
+});