Move test___all__ over to unittest.main() and use ModuleNotFoundError
diff --git a/Lib/xmlrpc/server.py b/Lib/xmlrpc/server.py
index 54e1726..80233e4 100644
--- a/Lib/xmlrpc/server.py
+++ b/Lib/xmlrpc/server.py
@@ -116,7 +116,7 @@
 import traceback
 try:
     import fcntl
-except ImportError:
+except ModuleNotFoundError:
     fcntl = None
 
 def resolve_dotted_attribute(obj, attr, allow_dotted_names=True):