diff --git a/Tests/Data/LIE/HydroMechanics/single_fracture_3D.prj b/Tests/Data/LIE/HydroMechanics/single_fracture_3D.prj
index 5836e3f7c063fb3d804bb12c7203bacee6a4e4c2..09ec38652344f8d6179d54ac0245aaab4b5ba3ae 100644
--- a/Tests/Data/LIE/HydroMechanics/single_fracture_3D.prj
+++ b/Tests/Data/LIE/HydroMechanics/single_fracture_3D.prj
@@ -34,7 +34,7 @@
                 <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_CHZ.prj b/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_CHZ.prj
index 7a0e944784f7bba59ee264db4e81a70b289c8fa5..782658fff4995de0b45a0861438a3bf82a78939e 100644
--- a/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_CHZ.prj
+++ b/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_CHZ.prj
@@ -43,7 +43,7 @@
                 <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_CHZ_sigma0.prj b/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_CHZ_sigma0.prj
index 81b613da30015092a0178f9d5505d118c792b1ec..51c05e8e6ac3955d347b7508da7aaf1f8c3b7524 100644
--- a/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_CHZ_sigma0.prj
+++ b/Tests/Data/LIE/HydroMechanics/single_fracture_3compartments_flow_CHZ_sigma0.prj
@@ -43,7 +43,7 @@
                 <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_CZ_kf_const.prj b/Tests/Data/LIE/HydroMechanics/single_fracture_CZ_kf_const.prj
index 0e260300f8a43f3a39a1a80393b68394acc3214a..a266a9e951f1bb8ec2a1cb4539915f6d8d0946e8 100644
--- a/Tests/Data/LIE/HydroMechanics/single_fracture_CZ_kf_const.prj
+++ b/Tests/Data/LIE/HydroMechanics/single_fracture_CZ_kf_const.prj
@@ -36,7 +36,7 @@
                 <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_CZ_kf_cubic.prj b/Tests/Data/LIE/HydroMechanics/single_fracture_CZ_kf_cubic.prj
index bd0ed802345372c537f822d40ba2e634a0194bcc..be936b0fc26808f36075e8d4e9492e24aef31ef2 100644
--- a/Tests/Data/LIE/HydroMechanics/single_fracture_CZ_kf_cubic.prj
+++ b/Tests/Data/LIE/HydroMechanics/single_fracture_CZ_kf_cubic.prj
@@ -36,7 +36,7 @@
                 <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_LE_kf_const.prj b/Tests/Data/LIE/HydroMechanics/single_fracture_LE_kf_const.prj
index 641924e6d783656b850e6d0aa54927b39e738869..55801256e1dddd5eb4044846be6737d7cf4c6f1a 100644
--- a/Tests/Data/LIE/HydroMechanics/single_fracture_LE_kf_const.prj
+++ b/Tests/Data/LIE/HydroMechanics/single_fracture_LE_kf_const.prj
@@ -34,7 +34,7 @@
                 <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_LE_kf_cubic.prj b/Tests/Data/LIE/HydroMechanics/single_fracture_LE_kf_cubic.prj
index ce62abac908b29eb5efcb66b580fa52c2c7b0735..49698985286eeacfb183ff3349957d8a505bf59b 100644
--- a/Tests/Data/LIE/HydroMechanics/single_fracture_LE_kf_cubic.prj
+++ b/Tests/Data/LIE/HydroMechanics/single_fracture_LE_kf_cubic.prj
@@ -34,7 +34,7 @@
                 <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>