diff --git a/dumux/porousmediumflow/mpnc/volumevariables.hh b/dumux/porousmediumflow/mpnc/volumevariables.hh
index 195ff321c2d9602edf98872d4d27bdbe4c8b7535..cb9138619b8b5d2b57a551cc5a17e78c3126862b 100644
--- a/dumux/porousmediumflow/mpnc/volumevariables.hh
+++ b/dumux/porousmediumflow/mpnc/volumevariables.hh
@@ -244,9 +244,6 @@ public:
             Scalar h = FluidSystem::enthalpy(fluidState, paramCache, phaseIdx);
             fluidState.setEnthalpy(phaseIdx, h);
         }
-
-        // make sure the quantities in the fluid state are well-defined
-        fluidState.checkDefined();
    }
 
     /*!
@@ -686,9 +683,6 @@ public:
             Scalar h = FluidSystem::enthalpy(fluidState, paramCache, phaseIdx);
             fluidState.setEnthalpy(phaseIdx, h);
         }
-
-        // make sure the quantities in the fluid state are well-defined
-        fluidState.checkDefined();
    }
 
         /*!
diff --git a/test/material/fluidsystems/checkfluidsystem.hh b/test/material/fluidsystems/checkfluidsystem.hh
index 70f73d2b2a7b19f0f975db277a65e0fe6b6d3133..d2c1428bd856478a20b565cdb2c2747c0d6ae5f1 100644
--- a/test/material/fluidsystems/checkfluidsystem.hh
+++ b/test/material/fluidsystems/checkfluidsystem.hh
@@ -263,9 +263,6 @@ int checkFluidState(const BaseFluidState &fs)
     BaseFluidState tmpFs(fs);
     tmpFs = fs;
 
-    // a fluid state must provide a checkDefined() method
-    fs.checkDefined();
-
     // output strings
     std::string collectedErrors;
     std::string collectedWarnings;