diff --git a/src/initial.test.js b/src/initial.test.js
index 9b2f7e7..f0188ea 100644
--- a/src/initial.test.js
+++ b/src/initial.test.js
@@ -1,12 +1,12 @@
-import tap from 'tap';
+import { Updux } from './Updux';
 
-import { Updux } from './Updux.js';
+test('initial', () => {
+    const foo = new Updux({
+        initial: { root: 'abc' },
+        subduxes: {
+            bar: new Updux({ initial: 123 }),
+        },
+    });
 
-const foo = new Updux({
-    initial: { root: 'abc' },
-    subduxes: {
-        bar: new Updux({ initial: 123 }),
-    },
+    expect(foo.initial).toMatchObject({ root: 'abc', bar: 123 });
 });
-
-tap.same(foo.initial, { root: 'abc', bar: 123 });