diff --git a/src/testCase/DsTestSimple/utSMapsDs.erl b/src/testCase/DsTestSimple/utSMapsDs.erl
index 6ab98e6..d7b80a7 100644
--- a/src/testCase/DsTestSimple/utSMapsDs.erl
+++ b/src/testCase/DsTestSimple/utSMapsDs.erl
@@ -31,14 +31,12 @@ insert(Num, Ds) ->
 read(0, Ds, _V) ->
    Ds;
 read(Num, Ds, _V) ->
-   V =
-      case Ds of
+   case Ds of
       #{Num := Value} ->
-         Value;
+         read(Num - 1, Ds, Value);
       _ ->
-         undefined
-   end,
-   read(Num - 1, Ds, V).
+         read(Num - 1, Ds, undefined)
+   end.
 
 update(0, Ds) ->
    Ds;