diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 746f59b0e72..663db961df5 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -2890,6 +2890,7 @@ def _to_memoryview(buf):
     arr.frombytes(buf[:idx])
     return memoryview(arr)
 
+
 class CTextIOWrapperTest(TextIOWrapperTest):
     io = io
     shutdown_error = "RuntimeError: could not find io module state"