diff --git a/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterAndIsopropanolEvaporation/constant/thermophysicalProperties.liquid.orig b/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterAndIsopropanolEvaporation/constant/thermophysicalProperties.liquid.orig
index ee12528a6a..1c03d6d792 100644
--- a/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterAndIsopropanolEvaporation/constant/thermophysicalProperties.liquid.orig
+++ b/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterAndIsopropanolEvaporation/constant/thermophysicalProperties.liquid.orig
@@ -21,7 +21,7 @@ thermoType
     mixture         multiComponentMixture;
     transport       const;
     thermo          hConst;
-    equationOfState perfectFluid;
+    equationOfState rhoConst;
     specie          specie;
     energy          sensibleInternalEnergy;
 }
@@ -42,8 +42,7 @@ H2O
     }
     equationOfState
     {
-        R               3000;
-        rho0            1027;
+        rho             1027;
     }
     thermodynamics
     {
@@ -67,6 +66,7 @@ C3H8O
     {
         R               3000;
         rho0            786;
+        rho             786;
     }
     thermodynamics
     {
diff --git a/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterEvaporation/constant/thermophysicalProperties.liquid b/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterEvaporation/constant/thermophysicalProperties.liquid
index da790c3e6b..2b7432baea 100644
--- a/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterEvaporation/constant/thermophysicalProperties.liquid
+++ b/test/multiphase/reactingTwoPhaseEulerFoam/interfaceComposition/waterEvaporation/constant/thermophysicalProperties.liquid
@@ -21,7 +21,7 @@ thermoType
     mixture         pureMixture;
     transport       const;
     thermo          hConst;
-    equationOfState perfectFluid;
+    equationOfState rhoConst;
     specie          specie;
     energy          sensibleInternalEnergy;
 }
@@ -34,8 +34,7 @@ mixture
     }
     equationOfState
     {
-        R           3000;
-        rho0        1027;
+        rho         1027;
     }
     thermodynamics
     {