Normalize temp path to use OS specific separator.

Author: fabiocaccamo

tests/conftest.py

@@ -9,6 +9,7 @@ def temp_path():
     with tempfile.TemporaryDirectory() as temp_dir:
 
         def _temp_path(filepath=""):
-            return os.path.join(temp_dir, filepath)
+            # normalize path to use OS-specific separators
+            return os.path.normpath(os.path.join(temp_dir, filepath))
 
         yield _temp_path