Run Black. (#5482)

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/storage/test_registration.py b/tests/storage/test_registration.py

index c0e0155bb4..625b651e91 100644
--- a/tests/storage/test_registration.py
+++ b/tests/storage/test_registration.py
@@ -128,4 +128,4 @@ class TokenGenerator:
 
     def generate(self, user_id):
         self._last_issued_token += 1
-        return u"%s-%d" % (user_id, self._last_issued_token)
+        return "%s-%d" % (user_id, self._last_issued_token)