diff --git a/ProcessLib/HT/Tests.cmake b/ProcessLib/HT/Tests.cmake
index e253bd720d3b692b339bd201d1201e73e39f5ad9..5c2bd8a965abcd1346422d8c95bdd29500115230 100644
--- a/ProcessLib/HT/Tests.cmake
+++ b/ProcessLib/HT/Tests.cmake
@@ -170,12 +170,12 @@ AddTest(
TESTER vtkdiff
REQUIREMENTS NOT OGS_USE_MPI
DIFF_DATA
- flux_1e4_t_0.000000_expected.vtu flux_1e4_t_0.000000.vtu flux flux 1e-10 1e-16
- flux_1e4_t_0.000010_expected.vtu flux_1e4_t_0.000010.vtu flux flux 1e-10 1e-16
- flux_1e4_t_0.001010_expected.vtu flux_1e4_t_0.001010.vtu flux flux 1e-10 1e-16
- flux_1e4_t_0.101010_expected.vtu flux_1e4_t_0.101010.vtu flux flux 1e-10 1e-16
- flux_1e4_t_1.101010_expected.vtu flux_1e4_t_1.101010.vtu flux flux 1e-10 1e-16
- flux_1e4_t_10.000000_expected.vtu flux_1e4_t_10.000000.vtu flux flux 1e-10 1e-16
+ flux_1e4_t_0.000000.vtu flux_1e4_t_0.000000.vtu specific_flux specific_flux 1e-10 1e-16
+ flux_1e4_t_0.000010.vtu flux_1e4_t_0.000010.vtu specific_flux specific_flux 1e-10 1e-16
+ flux_1e4_t_0.001010.vtu flux_1e4_t_0.001010.vtu specific_flux specific_flux 1e-10 1e-16
+ flux_1e4_t_0.101010.vtu flux_1e4_t_0.101010.vtu specific_flux specific_flux 1e-10 1e-16
+ flux_1e4_t_1.101010.vtu flux_1e4_t_1.101010.vtu specific_flux specific_flux 1e-10 1e-16
+ flux_1e4_t_10.000000.vtu flux_1e4_t_10.000000.vtu specific_flux specific_flux 1e-10 1e-16
)
# Staggered scheme
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/calculatesurfaceflux_ht_cube_1e4.prj b/Tests/Data/Parabolic/HT/SimpleSynthetics/calculatesurfaceflux_ht_cube_1e4.prj
index bbf45b9cbfe9bc68fd94bd502aeb46394b507b30..6b7ed2d017508e729911cc9e04212d751e3b5b35 100644
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/calculatesurfaceflux_ht_cube_1e4.prj
+++ b/Tests/Data/Parabolic/HT/SimpleSynthetics/calculatesurfaceflux_ht_cube_1e4.prj
@@ -61,7 +61,7 @@
</secondary_variables>
<calculatesurfaceflux>
<mesh>cube_1x1x1_hex_1e4_complete_surface</mesh>
- <property_name>flux</property_name>
+ <property_name>specific_flux</property_name>
<output_mesh>flux_1e4.vtu</output_mesh>
</calculatesurfaceflux>
</process>
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000000.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000000.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..1a28d28f4335e59eacf21c5b0710d34cd05f68c9
--- /dev/null
+++ b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000000.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:16551373d4404557c1380ae254ed01a3a22a4fcb5c233388e688d73e0cdbf737
+size 377195
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000000_expected.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000000_expected.vtu
deleted file mode 100644
index 1688ccf677ecace11c8fa657f3f6e42ca77a80ba..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000000_expected.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a75912e813d2bb64404931b712b03f96cbd441082529a9f967f3d65f03802aa6
-size 377185
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000010.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000010.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..15ae43584a0d1ba4e392897e1998e78122ff8096
--- /dev/null
+++ b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000010.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0454dbe713ceace76289208874098d2490732a9a651c659d2b1c21e4b0e53873
+size 377195
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000010_expected.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000010_expected.vtu
deleted file mode 100644
index be50486b1bd3fceec6456d6a62cd04b3b00dc996..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.000010_expected.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:2a9a592901b333e3f32c4c96c89b7ca53783de6fab04d4e7938e17369b9c2b27
-size 377186
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.001010.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.001010.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..7cd28dddcf94b3db46c8d4e0f0d9a37633b69aae
--- /dev/null
+++ b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.001010.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fb60b45c2dcdb542652c8dd0e88d854ca344a86a595efe740d6cad844cd646ce
+size 377195
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.001010_expected.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.001010_expected.vtu
deleted file mode 100644
index 1049c504d1705d7b035c1b95623e5ef33bc080b6..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.001010_expected.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:5b35756b997899cc53f4827bebc06e9f4d0df48f36d778fc599d955f8f9a480e
-size 377186
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.101010.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.101010.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..f31341273c5c91a1d620103e251036ddbca9a174
--- /dev/null
+++ b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.101010.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:c6d051472a5bdbeff63328d6792fc9531cf1f06857b5f13199a2dee2d9d43ca2
+size 377195
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.101010_expected.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.101010_expected.vtu
deleted file mode 100644
index 7eb41b10fec9047f21a0e200e3c3ab4b09577e36..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_0.101010_expected.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0beb0f63af264abfe500176bc8f197b052abb2f6c54c9a81f687f674121bd5f0
-size 377186
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_1.101010.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_1.101010.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..09dbc85dd6414d522d73947f2a49ad317c092bcb
--- /dev/null
+++ b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_1.101010.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e6bb60dca811b9201d4410223ae4f8ede82fcf65094cce874fd61225824c436f
+size 377173
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_1.101010_expected.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_1.101010_expected.vtu
deleted file mode 100644
index 4c6cb959d6810ae09d97235604e19bf10dfbe4a4..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_1.101010_expected.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:d9da89b11be1337ca5a40d4c9d42b0717df74d51ff2174cf9ea2caba1ee619b3
-size 377186
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_10.000000.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_10.000000.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..b1ab746479629fa2a172f5f1cfcb60388a85fbc9
--- /dev/null
+++ b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_10.000000.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e70a54e2fe6c2e0e2efaf5888da3f3785919a6b0f4349442af757fac8d402e96
+size 377173
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_10.000000_expected.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_10.000000_expected.vtu
deleted file mode 100644
index 91b41ee35e0346258310022ccb30f9637b6d689f..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/flux_1e4_t_10.000000_expected.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:14bfddced5dfc1a5b38560bea12b0c1f27d2700524b341f2ada9e34227c91641
-size 377186