diff --git a/src/_pytest/outcomes.py b/src/_pytest/outcomes.py
index ca251c0e8..d12e78266 100644
--- a/src/_pytest/outcomes.py
+++ b/src/_pytest/outcomes.py
@@ -49,7 +49,7 @@ class Failed(OutcomeException):
 class Exit(KeyboardInterrupt):
     """ raised for immediate program exits (no tracebacks/summaries)"""
 
-    def __init__(self, returncode=None, msg="unknown reason"):
+    def __init__(self, msg="unknown reason", returncode=None):
         self.msg = msg
         self.returncode = returncode
         KeyboardInterrupt.__init__(self, msg)