diff --git a/svn/common.py b/svn/common.py
index 723d733..4de3415 100644
--- a/svn/common.py
+++ b/svn/common.py
@@ -44,6 +44,7 @@ def run_command(self, subcommand, args, success_code=0,
         if self.__username is not None and self.__password is not None:
             cmd += ['--username', self.__username]
             cmd += ['--password', self.__password]
+            cmd += ['--no-auth-cache']
 
         cmd += [subcommand] + args