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Diffstat (limited to 'lib/sqlalchemy/testing/plugin/plugin_base.py')
-rw-r--r--lib/sqlalchemy/testing/plugin/plugin_base.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sqlalchemy/testing/plugin/plugin_base.py b/lib/sqlalchemy/testing/plugin/plugin_base.py
index ca8abaa8e..2aeebd319 100644
--- a/lib/sqlalchemy/testing/plugin/plugin_base.py
+++ b/lib/sqlalchemy/testing/plugin/plugin_base.py
@@ -54,7 +54,7 @@ def setup_options(make_option):
make_option("--db", action="append", type="string", dest="db",
help="Use prefab database uri. Multiple OK, "
"first one is run by default.")
- make_option('--dbs', action='callback', callback=_list_dbs,
+ make_option('--dbs', action='callback', zeroarg_callback=_list_dbs,
help="List available prefab dbs")
make_option("--dburi", action="append", type="string", dest="dburi",
help="Database uri. Multiple OK, "