diff --git a/src/_pytest/logging.py b/src/_pytest/logging.py
index e0d71c7eb..642000831 100644
--- a/src/_pytest/logging.py
+++ b/src/_pytest/logging.py
@@ -59,7 +59,7 @@ class ColoredLevelFormatter(logging.Formatter):
         logging.DEBUG: {"purple"},
         logging.NOTSET: set(),
     }
-    LEVELNAME_FMT_REGEX = re.compile(r"%\(levelname\)([+-.]?\d*s)")
+    LEVELNAME_FMT_REGEX = re.compile(r"%\(levelname\)([+-.]?\d*[.]?\d*s)")
 
     def __init__(self, terminalwriter: TerminalWriter, *args, **kwargs) -> None:
         super().__init__(*args, **kwargs)