1 files changed, 4 insertions, 4 deletions
diff --git a/string_utils.py b/string_utils.py
index d75c6ba..adfb149 100644
--- a/string_utils.py
+++ b/string_utils.py
@@ -40,7 +40,7 @@ import string
 import unicodedata
 import warnings
 from itertools import zip_longest
-from typing import Any, Callable, Dict, Iterable, List, Optional, Sequence, Tuple
+from typing import Any, Callable, Dict, Iterable, List, Literal, Optional, Sequence, Tuple
 from uuid import uuid4
 
 import list_utils
@@ -1208,7 +1208,7 @@ def sprintf(*args, **kwargs) -> str:
     return ret
 
 
-class SprintfStdout(object):
+class SprintfStdout(contextlib.AbstractContextManager):
     """
     A context manager that captures outputs to stdout.
 
@@ -1228,10 +1228,10 @@ class SprintfStdout(object):
         self.recorder.__enter__()
         return lambda: self.destination.getvalue()
 
-    def __exit__(self, *args) -> None:
+    def __exit__(self, *args) -> Literal[False]:
         self.recorder.__exit__(*args)
         self.destination.seek(0)
-        return None  # don't suppress exceptions
+        return False
 
 
 def capitalize_first_letter(txt: str) -> str: