diff --git a/apps/emqx_ft/test/props/prop_emqx_ft_assembly.erl b/apps/emqx_ft/test/props/prop_emqx_ft_assembly.erl
index a437e8dfe..9a2b7df0b 100644
--- a/apps/emqx_ft/test/props/prop_emqx_ft_assembly.erl
+++ b/apps/emqx_ft/test/props/prop_emqx_ft_assembly.erl
@@ -189,7 +189,7 @@ segment_t(Filesize, Segsizes) ->
     ).
 
 filesize_t() ->
-    scaled(4000, non_neg_integer()).
+    scaled(2500, non_neg_integer()).
 
 segsizes_t() ->
     ?LET(