diff --git a/src/_pytest/fixtures.py b/src/_pytest/fixtures.py
index d70b2c64a..5d54078de 100644
--- a/src/_pytest/fixtures.py
+++ b/src/_pytest/fixtures.py
@@ -547,9 +547,8 @@ class FixtureRequest:
             if has_params:
                 frame = inspect.stack()[3]
                 frameinfo = inspect.getframeinfo(frame[0])
-                source_path = frameinfo.filename
+                source_path = py.path.local(frameinfo.filename)
                 source_lineno = frameinfo.lineno
-                source_path = py.path.local(source_path)
                 rel_source_path = source_path.relto(funcitem.config.rootdir)
                 if rel_source_path:
                     source_path_str = rel_source_path