diff --git a/test/tierror.test.js b/test/tierror.test.js
new file mode 100644
index 00000000..35dd604e
--- /dev/null
+++ b/test/tierror.test.js
@@ -0,0 +1,15 @@
+import { TiError } from '../src/util/tierror.js';
+import { describe, expect, it } from 'vitest';
+
+describe('TiError', () => {
+	it('should support no meta info', () => {
+		const e = new TiError('oh no');
+		expect(e.toString()).to.equal('Error: oh no');
+	});
+
+	it('should mix in meta info', () => {
+		const e = new TiError('oh no', { reason: 'something' });
+		expect(e.toString()).to.equal('Error: oh no');
+		expect(e.reason).to.equal('something');
+	});
+});
diff --git a/vitest.config.js b/vitest.config.js
new file mode 100644
index 00000000..813c23d0
--- /dev/null
+++ b/vitest.config.js
@@ -0,0 +1,14 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+	test: {
+		coverage: {
+			reporter: ['html', 'lcov', 'text']
+		},
+		environment: 'node',
+		include: [
+			'test/**/*.test.js'
+		],
+		watch: false
+	}
+});