diff --git a/tests/data/setUploadLimit/user.ini b/tests/data/setUploadLimit/user.ini
index c5996e8d47e..5cad4e02106 100644
--- a/tests/data/setUploadLimit/user.ini
+++ b/tests/data/setUploadLimit/user.ini
@@ -1,7 +1,6 @@
 upload_max_filesize=513M
 post_max_size=513M
 memory_limit=512M
-mbstring.func_overload=0
 always_populate_raw_post_data=-1
 default_charset='UTF-8'
 output_buffering=off