diff --git a/ProcessLib/GroundwaterFlow/Tests.cmake b/ProcessLib/GroundwaterFlow/Tests.cmake
index 04989e1770cde3daef69be18bc2a8930a3d7e6ca..7dff88ffb982ae3cb8c28f518eea44c4a2ab8ea6 100644
--- a/ProcessLib/GroundwaterFlow/Tests.cmake
+++ b/ProcessLib/GroundwaterFlow/Tests.cmake
@@ -266,7 +266,7 @@ AddTest(
     TESTER vtkdiff
     REQUIREMENTS NOT OGS_USE_MPI
     DIFF_DATA
-    cube_1x1x1_hex_1e3_complete_surface.vtu cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_surfaceflux_t_1.000000.vtu surfaceflux_left_right_dirichlet_reference surfaceflux 1e-15 1e-15
+    cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux_t_1.000000.vtu cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux_t_1.000000.vtu specific_flux specific_flux 1e-15 1e-15
 )
 AddTest(
     NAME GroundWaterFlowProcess_cube_1x1x1_1e3_neumann_calculatesurfaceflux
diff --git a/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1e3_calculatesurfaceflux.prj b/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1e3_calculatesurfaceflux.prj
index 12f4ae0ee9d4d600c6a587812288dbc20dfd0310..a8e9d85105eac77b7a39beec1fb052379cd1a269 100644
--- a/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1e3_calculatesurfaceflux.prj
+++ b/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1e3_calculatesurfaceflux.prj
@@ -20,8 +20,8 @@
             </secondary_variables>
             <calculatesurfaceflux>
                 <mesh>cube_1x1x1_hex_1e3_complete_surface</mesh>
-                <property_name>surfaceflux</property_name>
-                <output_mesh>cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_surfaceflux.vtu</output_mesh>
+                <property_name>specific_flux</property_name>
+                <output_mesh>cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux.vtu</output_mesh>
             </calculatesurfaceflux>
         </process>
     </processes>
diff --git a/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1x1x1_hex_1e3_complete_surface.vtu b/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1x1x1_hex_1e3_complete_surface.vtu
index 44e59b0b5809a0e98c1d6b6a0beaff5e02891183..303a9f426e18ba598faa5a55f8538f6f5d306b24 100644
--- a/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1x1x1_hex_1e3_complete_surface.vtu
+++ b/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1x1x1_hex_1e3_complete_surface.vtu
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:f8f567f4e6e43a6c00d914365e71a8c040113928495cd761e85de71c490adcd3
-size 19370
+oid sha256:4f405c070ea2cab30321345825eff7421fb1a5401cc2887a68da26e4e04d0b70
+size 65673
diff --git a/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux_t_1.000000.vtu b/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux_t_1.000000.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..cb0b6c34e3f237a4b56330fa0c806780938a9856
--- /dev/null
+++ b/Tests/Data/Elliptic/cube_1x1x1_GroundWaterFlow/cube_1x1x1_hex_1e3_complete_surface_left_right_dirichlet_specific_flux_t_1.000000.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6ae8b3a575d4db0e2efa4b16390debfb128db4eab2848924d1468aee28abd7a0
+size 79174