diff --git a/mCustomScrollbar/mCustomScrollbar-tests.ts b/mCustomScrollbar/mCustomScrollbar-tests.ts
index e2c43a119..7dcf79356 100644
--- a/mCustomScrollbar/mCustomScrollbar-tests.ts
+++ b/mCustomScrollbar/mCustomScrollbar-tests.ts
@@ -39,7 +39,7 @@ class SimpleTestAllParams {
             advanced: {
                 updateOnBrowserResize: true,
                 updateOnContentResize: false,
-                autoExpandscrollInertia: false,
+                autoExpandHorizontalScroll: false,
                 autoScrollOnFocus: true,
                 normalizeMouseWheelDelta: false
             },