https://github.com/pandas-dev/pandas-stubs/pull/1508#discussion_r2574695253

Author: cmp0xff

tests/_typing.py

@@ -1,5 +1,10 @@
-# Committed content should be import-only. At runtime of tests, this file will
-# be replaced by pandas-stubs/_typing.pyi.
+# This file serves as a stub file for static type checkers
+# (pyright does not like it if I call the file tests/_typing.pyi).
+# In tests/conftest.py, this file is copied to tests/_typing.pyi, and
+# pandas-stubs/_typing.pyi is copied to tests/_typing.py.
+# After tests are done, tests/_typing.pyi is copied back to
+# pandas-stubs/_typing.pyi.
+# Do not commit this file if its content is identical to pandas-stubs/_typing.pyi.
 
 from pandas._typing import (
     BooleanDtypeArg,