diff --git a/irctest/server_tests/test_user_commands.py b/irctest/server_tests/test_user_commands.py
index 5809966..8273dec 100644
--- a/irctest/server_tests/test_user_commands.py
+++ b/irctest/server_tests/test_user_commands.py
@@ -12,7 +12,7 @@ class WhoisTestCase(cases.BaseServerTestCase):
     def testWhoisUser(self):
         """Test basic WHOIS behavior"""
         nick = 'myCoolNickname'
-        username = 'myCoolUsername'
+        username = 'myUsernam'  # may be truncated if longer than this
         realname = 'My Real Name'
         self.addClient()
         self.sendLine(1, f'NICK {nick}')