It worked for me at home...

Author: ThosRTanner

.coveragerc

@@ -7,7 +7,7 @@ omit =
 
 # Note - this is a copy of the default exclusions from coverage 7.10.1
 [report]
-exclude_lines = 
+exclude_lines =
     #\s*(pragma|PRAGMA)[:\s]?\s*(no|NO)\s*(cover|COVER)
     ^\s*(((async )?def .*?)?\)(\s*->.*?)?:\s*)?\.\.\.\s*(#|$)
     if (typing\.)?TYPE_CHECKING:

setup.cfg

@@ -83,11 +83,15 @@ typing =
     mypy>=0.991
     types-gevent
 
+other =
+    typing-extensions
+
 alldeps =
     %(dev)s
     %(eventlet)s
     %(gevent)s
     %(sasl)s
     %(docs)s
+    %(other)s
     %(typing)s