diff --git a/Lib/ctypes/test/test_callbacks.py b/Lib/ctypes/test/test_callbacks.py
index 901456d..be0c17e 100644
--- a/Lib/ctypes/test/test_callbacks.py
+++ b/Lib/ctypes/test/test_callbacks.py
@@ -146,7 +146,7 @@
             def __del__(self):
                 gc.collect()
         CFUNCTYPE(None)(lambda x=Nasty(): None)
-        
+
 
 try:
     WINFUNCTYPE