From b49309936088365e67346d4b5620f972559f0518 Mon Sep 17 00:00:00 2001
From: Kadir Can Ozden <101993364+bysiber@users.noreply.github.com>
Date: Fri, 20 Feb 2026 12:20:33 +0300
Subject: [PATCH] Fix retry_if_exception_message rejecting empty string
 arguments
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The truthiness checks (if message, elif match) treat empty string
as falsy, so message='' or match='' falls through to the else
branch and raises TypeError. These are valid values — an empty
message matches exceptions like Exception() where str(exc) == ''.

Switched to 'is not None' checks.
---
 tenacity/retry.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tenacity/retry.py b/tenacity/retry.py
index 593b252d..38cbebfa 100644
--- a/tenacity/retry.py
+++ b/tenacity/retry.py
@@ -198,19 +198,19 @@ def __init__(
         message: str | None = None,
         match: None | str | re.Pattern[str] = None,
     ) -> None:
-        if message and match:
+        if message is not None and match is not None:
             raise TypeError(
                 f"{self.__class__.__name__}() takes either 'message' or 'match', not both"
             )
 
         # set predicate
-        if message:
+        if message is not None:
 
             def message_fnc(exception: BaseException) -> bool:
                 return message == str(exception)
 
             predicate = message_fnc
-        elif match:
+        elif match is not None:
             prog = re.compile(match)
 
             def match_fnc(exception: BaseException) -> bool: