diff --git a/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow.prj b/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow.prj
index 849be7e477989d681d2938a278401fd1bd9ac207..cda72a516b5d4ce85d5e194bf505f5f863186f8c 100644
--- a/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow.prj
+++ b/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow.prj
@@ -35,7 +35,7 @@
                 <tension_cutoff>1</tension_cutoff>
             </fracture_model>
             <fracture_properties>
-                <material_id>0</material_id>
+                <material_id>1</material_id>
                 <initial_aperture>aperture0</initial_aperture>
                 <specific_storage>S_f</specific_storage>
                 <biot_coefficient>biot_f</biot_coefficient>
diff --git a/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_linear_aperture0.prj b/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_linear_aperture0.prj
index 15029720bfc21d07385efd1746812b04e7570d0d..045620488966890f2c347d665304f7a061687872 100644
--- a/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_linear_aperture0.prj
+++ b/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_linear_aperture0.prj
@@ -35,7 +35,7 @@
                 <tension_cutoff>1</tension_cutoff>
             </fracture_model>
             <fracture_properties>
-                <material_id>0</material_id>
+                <material_id>1</material_id>
                 <initial_aperture>aperture0</initial_aperture>
                 <specific_storage>S_f</specific_storage>
                 <biot_coefficient>biot_f</biot_coefficient>
diff --git a/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_linear_aperture0_e.prj b/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_linear_aperture0_e.prj
index 2e76d5b44018fb23e1c7016cfdb9bf04ba0bc6d6..c76bc8e9cf9ff81d3654cc437da11861a3321588 100644
--- a/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_linear_aperture0_e.prj
+++ b/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_linear_aperture0_e.prj
@@ -35,7 +35,7 @@
                 <tension_cutoff>1</tension_cutoff>
             </fracture_model>
             <fracture_properties>
-                <material_id>0</material_id>
+                <material_id>1</material_id>
                 <initial_aperture>aperture0</initial_aperture>
                 <specific_storage>S_f</specific_storage>
                 <biot_coefficient>biot_f</biot_coefficient>