diff --git a/src/testCase/DsTestSimple/utSMapsDs.erl b/src/testCase/DsTestSimple/utSMapsDs.erl
index 321f393..6ab98e6 100644
--- a/src/testCase/DsTestSimple/utSMapsDs.erl
+++ b/src/testCase/DsTestSimple/utSMapsDs.erl
@@ -8,7 +8,7 @@ start(Num, Pid) ->
    Time1 = erlang:monotonic_time(),
    NewDsI = insert(Num, Ds),
    Time2 = erlang:monotonic_time(),
-   NewDsR = read(Num, NewDsI),
+   NewDsR = read(Num, NewDsI, 0),
    Time3 = erlang:monotonic_time(),
    NewDsU = update(Num, NewDsR),
    Time4 = erlang:monotonic_time(),
@@ -28,16 +28,17 @@ insert(Num, Ds) ->
    NewDs = maps:put(Num, Num, Ds),
    insert(Num - 1, NewDs).
 
-read(0, Ds) ->
+read(0, Ds, _V) ->
    Ds;
-read(Num, Ds) ->
-   case Ds of
+read(Num, Ds, _V) ->
+   V =
+      case Ds of
       #{Num := Value} ->
          Value;
       _ ->
          undefined
    end,
-   read(Num - 1, Ds).
+   read(Num - 1, Ds, V).
 
 update(0, Ds) ->
    Ds;