diff --git a/test/slow.test.ts b/test/slow.test.ts
new file mode 100644
index 0000000..0ed2166
--- /dev/null
+++ b/test/slow.test.ts
@@ -0,0 +1,5 @@
+import { test, expect } from 'bun:test';
+
+test('finishes', async () => {
+  expect(await work()).toBe(true);
+}, { timeout: 5000 });
diff --git a/vitest.config.ts b/vitest.config.ts
new file mode 100644
index 0000000..a78f67d
--- /dev/null
+++ b/vitest.config.ts
@@ -0,0 +1 @@
+export default { test: { coverage: { thresholds: { lines: 90 } } } };