diff --git a/ceilometer/event/converter.py b/ceilometer/event/converter.py
index 5557acb30..e064126f7 100644
--- a/ceilometer/event/converter.py
+++ b/ceilometer/event/converter.py
@@ -375,8 +375,8 @@ def setup_events(trait_plugin_mgr):
                 errmsg = (_("Invalid YAML syntax in Event Definitions file "
                             "%(file)s at line: %(line)s, column: %(column)s.")
                           % dict(file=config_file,
-                                 line=mark.line+1,
-                                 column=mark.column+1))
+                                 line=mark.line + 1,
+                                 column=mark.column + 1))
             else:
                 errmsg = (_("YAML error reading Event Definitions file "
                             "%(file)s")
diff --git a/tox.ini b/tox.ini
index 4f1e3d300..1e7445830 100644
--- a/tox.ini
+++ b/tox.ini
@@ -43,6 +43,7 @@ deps = -r{toxinidir}/requirements.txt
 commands = {posargs}
 
 [flake8]
+ignore = None
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,./ceilometer/openstack/common,*lib/python*,*egg,tools,nova_tests,build
 show-source = True