diff --git a/tests/test_vanity.py b/tests/test_vanity.py
index 78585b19..cb294780 100644
--- a/tests/test_vanity.py
+++ b/tests/test_vanity.py
@@ -13,6 +13,6 @@ class TestBasic(unittest.TestCase):
     def test_basic(self):
         pair = vanityonionr.find_multiprocess("onion")
         b = niceware.bytes_to_passphrase(pair[0])
-        self.assertIn("onion", b)
+        self.assertTrue(b[0].startswith("onion"))
 
 unittest.main()
\ No newline at end of file