diff --git a/pycodestyle.py b/pycodestyle.py
index 9df2ae4c..cc028b81 100755
--- a/pycodestyle.py
+++ b/pycodestyle.py
@@ -158,7 +158,7 @@
 else:  # pragma: <3.12 cover
     FSTRING_START = FSTRING_MIDDLE = FSTRING_END = -1
 
-if sys.version_info >= (3, 14):  # pragma: >=3.14 cover
+if sys.version_info >= (3, 14, 0, 'beta'):  # pragma: >=3.14 cover
     TSTRING_START = tokenize.TSTRING_START
     TSTRING_MIDDLE = tokenize.TSTRING_MIDDLE
     TSTRING_END = tokenize.TSTRING_END