diff --git a/Tests/Data/Parabolic/LiquidFlow/AxiSymTheis/axisym_theis.prj b/Tests/Data/Parabolic/LiquidFlow/AxiSymTheis/axisym_theis.prj
index 1d7c34119d000905c20c1d452bacec35daf5b5f3..4dda392d35c0a22465794b01af96c9581cfb3e05 100644
--- a/Tests/Data/Parabolic/LiquidFlow/AxiSymTheis/axisym_theis.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/AxiSymTheis/axisym_theis.prj
@@ -61,6 +61,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/BuildupTest/buildup_test.prj b/Tests/Data/Parabolic/LiquidFlow/BuildupTest/buildup_test.prj
index 1dbe5d86b2841355da07de0e6566660c83aff1e3..92d9cdfc934c196d6a603381505cadb836fd5ca6 100644
--- a/Tests/Data/Parabolic/LiquidFlow/BuildupTest/buildup_test.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/BuildupTest/buildup_test.prj
@@ -42,6 +42,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC/TestSet_01.prj b/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC/TestSet_01.prj
index 9f35ef032aeceb2fa3438f45f328751e1853cbe5..4b98a12613056b3a79cbb998e8985d5419a64fdf 100644
--- a/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC/TestSet_01.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC/TestSet_01.prj
@@ -104,6 +104,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_RECHARGE/TestSet_01.prj b/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_RECHARGE/TestSet_01.prj
index 711d6f3918f725011f22f916d9536dae9bcfa6d1..1d1a8414a81c74451f780a50129b9b4485ed3dc9 100644
--- a/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_RECHARGE/TestSet_01.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_RECHARGE/TestSet_01.prj
@@ -105,6 +105,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_RECHARGE2/TestSet_01.prj b/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_RECHARGE2/TestSet_01.prj
index ce9f6901186458bd7cc8b752084f666001dd5011..bfed71be34b8db80a3b79c356ad3b7075ab0aebe 100644
--- a/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_RECHARGE2/TestSet_01.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_RECHARGE2/TestSet_01.prj
@@ -105,6 +105,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_STORAGE/TestSet_01.prj b/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_STORAGE/TestSet_01.prj
index 90df324e03c8b596b97c4b54a88899a66781574f..cfba6aa1bf22be1557b48edc39e4a5be7cd21f27 100644
--- a/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_STORAGE/TestSet_01.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Dupuit/BC_BC_STORAGE/TestSet_01.prj
@@ -105,6 +105,11 @@
                     <type>Constant</type>
                     <value>0.25</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1e1_calculatesurfaceflux.prj b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1e1_calculatesurfaceflux.prj
index 1d46640291d51c7c8f7e231cf7a2f28aad35a73f..cc7a5214f4e05104d381b8bcd764c141b6c766f5 100644
--- a/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1e1_calculatesurfaceflux.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Flux/2D/square_1e1_calculatesurfaceflux.prj
@@ -110,6 +110,11 @@
                     <type>Constant</type>
                     <value>1</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Flux/cube_1e3_calculatesurfaceflux.prj b/Tests/Data/Parabolic/LiquidFlow/Flux/cube_1e3_calculatesurfaceflux.prj
index f43747f4e37e55f0b8c25cb9927e03e36735181c..fdacb6d2d5a2cf0c08fe6725218404f2a10aad02 100644
--- a/Tests/Data/Parabolic/LiquidFlow/Flux/cube_1e3_calculatesurfaceflux.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Flux/cube_1e3_calculatesurfaceflux.prj
@@ -110,6 +110,11 @@
                     <type>Constant</type>
                     <value>1</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/GravityDriven/gravity_driven.prj b/Tests/Data/Parabolic/LiquidFlow/GravityDriven/gravity_driven.prj
index b1b272185aeb2b717aed0df1a1b21c51510af552..bb2145cde4b674d608adacea187e8d028be47a92 100644
--- a/Tests/Data/Parabolic/LiquidFlow/GravityDriven/gravity_driven.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/GravityDriven/gravity_driven.prj
@@ -61,6 +61,11 @@
                     <type>Constant</type>
                     <value>0.2</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/GravityDriven3D/anisotropic_gravity_driven3D.prj b/Tests/Data/Parabolic/LiquidFlow/GravityDriven3D/anisotropic_gravity_driven3D.prj
index 30caef158ff959744e807d4fda5c572e9c2e223c..e5d5fb5a49035dca15aaa32fca24cafcac48fdcd 100644
--- a/Tests/Data/Parabolic/LiquidFlow/GravityDriven3D/anisotropic_gravity_driven3D.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/GravityDriven3D/anisotropic_gravity_driven3D.prj
@@ -61,6 +61,11 @@
                     <type>Constant</type>
                     <value>0.2</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/GravityDriven3D/isotropic_gravity_driven3D.prj b/Tests/Data/Parabolic/LiquidFlow/GravityDriven3D/isotropic_gravity_driven3D.prj
index b61f07771f52176b54c5c97535b7bb60b20ee3a5..372cc807713c72488c3b9d18c40e254837a9fc0b 100644
--- a/Tests/Data/Parabolic/LiquidFlow/GravityDriven3D/isotropic_gravity_driven3D.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/GravityDriven3D/isotropic_gravity_driven3D.prj
@@ -61,6 +61,11 @@
                     <type>Constant</type>
                     <value>0.2</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/LineDirichletNeumannBC/line_dirichlet_neumannBC.prj b/Tests/Data/Parabolic/LiquidFlow/LineDirichletNeumannBC/line_dirichlet_neumannBC.prj
index 2016f5acafe6ce436d03e2ee44c7c6e4f8eef750..180d4a18dec5889066da8f12e1ea67c89dd2978d 100644
--- a/Tests/Data/Parabolic/LiquidFlow/LineDirichletNeumannBC/line_dirichlet_neumannBC.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/LineDirichletNeumannBC/line_dirichlet_neumannBC.prj
@@ -61,6 +61,11 @@
                     <type>Constant</type>
                     <value>0.2</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/PressureBCatCornerOfAnisotropicSquare/pressureBC_at_corner_of_anisotropic_square.prj b/Tests/Data/Parabolic/LiquidFlow/PressureBCatCornerOfAnisotropicSquare/pressureBC_at_corner_of_anisotropic_square.prj
index 333e43b4d1ece20eb10211d3cf8a49f331171231..0420b6e4f3d979a82029fa96b5b5c8aaac326b75 100644
--- a/Tests/Data/Parabolic/LiquidFlow/PressureBCatCornerOfAnisotropicSquare/pressureBC_at_corner_of_anisotropic_square.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/PressureBCatCornerOfAnisotropicSquare/pressureBC_at_corner_of_anisotropic_square.prj
@@ -61,6 +61,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/TimeDependentHeterogeneousBoundaryConditions/TimeDependentHeterogeneousBoundaryConditions.prj b/Tests/Data/Parabolic/LiquidFlow/TimeDependentHeterogeneousBoundaryConditions/TimeDependentHeterogeneousBoundaryConditions.prj
index 12e7a4cbef76be251f1fcbe02f8811580f0d45b2..d6b35f632def2a08e0f02aff9cd339c14e802f8f 100644
--- a/Tests/Data/Parabolic/LiquidFlow/TimeDependentHeterogeneousBoundaryConditions/TimeDependentHeterogeneousBoundaryConditions.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/TimeDependentHeterogeneousBoundaryConditions/TimeDependentHeterogeneousBoundaryConditions.prj
@@ -116,6 +116,11 @@
                     <type>Constant</type>
                     <value>0.2</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/TimeDependentHeterogeneousSourceTerm/TimeDependentHeterogeneousSourceTerm.prj b/Tests/Data/Parabolic/LiquidFlow/TimeDependentHeterogeneousSourceTerm/TimeDependentHeterogeneousSourceTerm.prj
index 79539e050f5ff93a8a08cf28a38aa1594eb7218a..d15fb4fa0345229185db1e76782d4b7f1b406db8 100644
--- a/Tests/Data/Parabolic/LiquidFlow/TimeDependentHeterogeneousSourceTerm/TimeDependentHeterogeneousSourceTerm.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/TimeDependentHeterogeneousSourceTerm/TimeDependentHeterogeneousSourceTerm.prj
@@ -117,6 +117,11 @@
                     <type>Constant</type>
                     <value>0.1</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/TimeIntervalDirichletBC/TimeIntervalDirichletBC.prj b/Tests/Data/Parabolic/LiquidFlow/TimeIntervalDirichletBC/TimeIntervalDirichletBC.prj
index 46272778aca9bab4a7159f0f793ea1d9b8f0c550..3686ab86efe72f5e627786132fd642c9407e8911 100644
--- a/Tests/Data/Parabolic/LiquidFlow/TimeIntervalDirichletBC/TimeIntervalDirichletBC.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/TimeIntervalDirichletBC/TimeIntervalDirichletBC.prj
@@ -104,6 +104,11 @@
                     <type>Constant</type>
                     <value>0.2</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Verification/h1_1Dsource/h1_1Dsource.prj b/Tests/Data/Parabolic/LiquidFlow/Verification/h1_1Dsource/h1_1Dsource.prj
index 2f8de77d52f3b3c9c572494f5f177a00c298951e..c582283a3122f5fec97d5dbd68d6d967c4fea9ce 100755
--- a/Tests/Data/Parabolic/LiquidFlow/Verification/h1_1Dsource/h1_1Dsource.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Verification/h1_1Dsource/h1_1Dsource.prj
@@ -59,6 +59,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
         <medium id="1">
@@ -100,6 +105,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Verification/h1_1Dsteady/h1_1Dsteady.prj b/Tests/Data/Parabolic/LiquidFlow/Verification/h1_1Dsteady/h1_1Dsteady.prj
index d5c5c581c3b03121b877bef92703eee6184c4d0c..11ef850e5343d712fac1576a399d3b720a561615 100755
--- a/Tests/Data/Parabolic/LiquidFlow/Verification/h1_1Dsteady/h1_1Dsteady.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Verification/h1_1Dsteady/h1_1Dsteady.prj
@@ -59,6 +59,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Verification/h1_3Dhydstat/h1_3Dhydstat.prj b/Tests/Data/Parabolic/LiquidFlow/Verification/h1_3Dhydstat/h1_3Dhydstat.prj
index acf7e6dfb8ace7b8ede2d19bbc5b2395da5bd591..02129412d5aba210cd15feb153a161689cc71565 100755
--- a/Tests/Data/Parabolic/LiquidFlow/Verification/h1_3Dhydstat/h1_3Dhydstat.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Verification/h1_3Dhydstat/h1_3Dhydstat.prj
@@ -59,6 +59,11 @@
                     <type>Constant</type>
                     <value>0.1</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
         <medium id="1">
@@ -100,6 +105,11 @@
                     <type>Constant</type>
                     <value>0.2</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
         <medium id="2">
@@ -141,6 +151,11 @@
                     <type>Constant</type>
                     <value>0.3</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
         <medium id="3">
@@ -182,6 +197,11 @@
                     <type>Constant</type>
                     <value>0.4</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Verification/h2_1D1bt/h2_1D1bt.prj b/Tests/Data/Parabolic/LiquidFlow/Verification/h2_1D1bt/h2_1D1bt.prj
index 2e6fbfcaadec6deeafc8367538797a677dc251f3..d10bed4089d6e533d65f73e687419afe01d2d7af 100755
--- a/Tests/Data/Parabolic/LiquidFlow/Verification/h2_1D1bt/h2_1D1bt.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Verification/h2_1D1bt/h2_1D1bt.prj
@@ -59,6 +59,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>
diff --git a/Tests/Data/Parabolic/LiquidFlow/Verification/h2_1D2bt/h2_1D2bt.prj b/Tests/Data/Parabolic/LiquidFlow/Verification/h2_1D2bt/h2_1D2bt.prj
index ff23ac02129157888a28aa97fbace7bd86439218..2199fd15900437eeb45839460153f4adc86b5c51 100755
--- a/Tests/Data/Parabolic/LiquidFlow/Verification/h2_1D2bt/h2_1D2bt.prj
+++ b/Tests/Data/Parabolic/LiquidFlow/Verification/h2_1D2bt/h2_1D2bt.prj
@@ -59,6 +59,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
         <medium id="1">
@@ -100,6 +105,11 @@
                     <type>Constant</type>
                     <value>1.0</value>
                 </property>
+                <property>
+                    <name>reference_temperature</name>
+                    <type>Constant</type>
+                    <value>293.15</value>
+                </property>
             </properties>
         </medium>
     </media>