diff --git a/ProcessLib/GroundwaterFlow/Tests.cmake b/ProcessLib/GroundwaterFlow/Tests.cmake
index 6678aa0a8dbe8402cdf40453cffca6a86a5dff15..582c7a1e957d3bc84b80c3a4ef1fccbcefaa2cfd 100644
--- a/ProcessLib/GroundwaterFlow/Tests.cmake
+++ b/ProcessLib/GroundwaterFlow/Tests.cmake
@@ -319,7 +319,7 @@ AddTest(
     TESTER vtkdiff
     REQUIREMENTS NOT OGS_USE_MPI
     DIFF_DATA
-    wedge_1x1x1_1e3_prism_complete_surface.vtu wedge_1x1x1_1e3_prism_complete_surface_surfaceflux_t_1.000000.vtu surfaceflux_reference surfaceflux 1e-15 1e-15
+    wedge_1x1x1_1e3_prism_complete_surface_specific_flux_t_1.000000.vtu wedge_1x1x1_1e3_prism_complete_surface_specific_flux_t_1.000000.vtu specific_flux specific_flux 1e-15 1e-15
 )
 
 # SQUARE 1x1 GROUNDWATER FLOW TEST -- AXIALLY SYMMETRIC
diff --git a/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1e3_prism_surfaceflux_diagonal.prj b/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1e3_prism_surfaceflux_diagonal.prj
index 12638cfb52235fa984baf88c2d41b6e25ceb3bb2..c4545c06bee786d430d71faf0eb283aaf798105b 100644
--- a/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1e3_prism_surfaceflux_diagonal.prj
+++ b/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1e3_prism_surfaceflux_diagonal.prj
@@ -20,8 +20,8 @@
             </secondary_variables>
             <calculatesurfaceflux>
                 <mesh>wedge_1x1x1_1e3_prism_complete_surface</mesh>
-                <property_name>surfaceflux</property_name>
-                <output_mesh>wedge_1x1x1_1e3_prism_complete_surface_surfaceflux.vtu</output_mesh>
+                <property_name>specific_flux</property_name>
+                <output_mesh>wedge_1x1x1_1e3_prism_complete_surface_specific_flux.vtu</output_mesh>
             </calculatesurfaceflux>
         </process>
     </processes>
diff --git a/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1x1x1_1e3_prism_complete_surface.vtu b/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1x1x1_1e3_prism_complete_surface.vtu
index c9740be56162943a2c386cd6e30dd4dcfb7686a7..cdf0c5bbcf87425311fc32e69ad98e0c1c0a3dab 100644
--- a/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1x1x1_1e3_prism_complete_surface.vtu
+++ b/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1x1x1_1e3_prism_complete_surface.vtu
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:da1bab5a81c4cec75d25f888ffeab2625c5b791554cf9986b8c47f95e96b0e84
-size 14507
+oid sha256:33240451142592538feba6d4067376ffbe8032eefc12b09e1fdf08d92210a71a
+size 50373
diff --git a/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1x1x1_1e3_prism_complete_surface_specific_flux_t_1.000000.vtu b/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1x1x1_1e3_prism_complete_surface_specific_flux_t_1.000000.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..91bd752976b23a81d3c878d068fc7c3cbe402328
--- /dev/null
+++ b/Tests/Data/Elliptic/wedge_1x1x1_GroundWaterFlow/wedge_1x1x1_1e3_prism_complete_surface_specific_flux_t_1.000000.vtu
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:87d222dbc647c32e2581b445def90d9040f9842693f3bd56097dc69b7ea4bcb0
+size 59856