diff --git a/CIME/SystemTests/mvk.py b/CIME/SystemTests/mvk.py
index 4f8a5c12ea8..de2cd6e81fa 100644
--- a/CIME/SystemTests/mvk.py
+++ b/CIME/SystemTests/mvk.py
@@ -275,7 +275,6 @@ def update_testlog(self, test_name, case_name, evv_out_dir):
                 copytree(
                     evv_out_dir,
                     os.path.join(htmlroot, "evv", case_name),
-                    preserve_mode=False,
                 )
 
             if urlroot is None: