diff --git a/tests/problems/co2ptflashproblemvalidation.hh b/tests/problems/co2ptflashproblemvalidation.hh
index 49c7e688d..065772b82 100644
--- a/tests/problems/co2ptflashproblemvalidation.hh
+++ b/tests/problems/co2ptflashproblemvalidation.hh
@@ -166,14 +166,14 @@ struct EndTime<TypeTag, TTag::CO2PTBaseProblem> {
 template <class TypeTag>
 struct EpisodeLength<TypeTag, TTag::CO2PTBaseProblem> {
     using type = GetPropType<TypeTag, Scalar>;
-    static constexpr type value = 21600.0;
+    static constexpr type value = 2*21600.0;
 };
 
 // convergence control
 template <class TypeTag>
 struct InitialTimeStepSize<TypeTag, TTag::CO2PTBaseProblem> {
     using type = GetPropType<TypeTag, Scalar>;
-    static constexpr type value = 21600.0;
+    static constexpr type value = 2*21600.0;
 };
 
 template <class TypeTag>
@@ -251,7 +251,7 @@ struct Vanguard<TypeTag, TTag::CO2PTBaseProblem> {
 template <class TypeTag>
 struct DomainSizeX<TypeTag, TTag::CO2PTBaseProblem> {
     using type = GetPropType<TypeTag, Scalar>;
-    static constexpr type value = 1000; // meter
+    static constexpr type value = 200; // meter
 };
 
 template <class TypeTag>