diff --git a/xdist/slavemanage.py b/xdist/slavemanage.py
index 61125242..ffac07e4 100644
--- a/xdist/slavemanage.py
+++ b/xdist/slavemanage.py
@@ -292,7 +292,7 @@ def process_from_remote(self, eventcall):  # noqa too complex
                     self._down = True
                 return
             eventname, kwargs = eventcall
-            if eventname in ("collectionstart"):
+            if eventname in ("collectionstart",):
                 self.log("ignoring %s(%s)" % (eventname, kwargs))
             elif eventname == "slaveready":
                 self.notify_inproc(eventname, node=self, **kwargs)