diff --git a/tests/abox/json_custom_relations/test_json_custom_relations.py b/tests/abox/json_custom_relations/test_json_custom_relations.py
index da234d0..d781925 100644
--- a/tests/abox/json_custom_relations/test_json_custom_relations.py
+++ b/tests/abox/json_custom_relations/test_json_custom_relations.py
@@ -39,18 +39,21 @@
             "youngs_modulus": 100,
             "material": "material_1",
             "kitem": "kitem_1",
+            "tensile_strength": [100, 200],
         },
         {
             "name": "specimen_2",
             "youngs_modulus": "200-300",
             "material": "material_2",
             "kitem": ["kitem_2", "kitem_3"],
+            "tensile_strength": [200, 300],
         },
         {
             "name": "specimen_3",
             "youngs_modulus": [300, 400],
             "material": "material_3",
             "kitem": "kitem_4",
+            "tensile_strength": [300, 400],
         },
     ]
 }
@@ -90,6 +93,24 @@
                     "concatenate": True,
                 },
             },
+            {
+                "object_location": "tensile_strength[0]",
+                "relation": "https://w3id.org/steel/ProcessOntology/hasMinimumTensileStrength",
+                "object_type": {
+                    "iri": "https://w3id.org/steel/ProcessOntology/TensileStrength",
+                    "unit": "MPa",
+                    "suffix": "tensile_strength_min",
+                },
+            },
+            {
+                "object_location": "tensile_strength[1]",
+                "relation": "https://w3id.org/steel/ProcessOntology/hasMaximumTensileStrength",
+                "object_type": {
+                    "iri": "https://w3id.org/steel/ProcessOntology/TensileStrength",
+                    "unit": "MPa",
+                    "suffix": "tensile_strength_max",
+                },
+            },
         ],
     }
 ]
@@ -103,18 +124,24 @@
     ns1:hasIdentifier "specimen_1"^^xsd:string ;
     ns1:hasMaterial <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#Material_specimen_1> ;
     ns1:hasYoungsModulus <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#YoungsModulus_specimen_1> ;
+    ns1:hasMaximumTensileStrength <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_max_specimen_1> ;
+    ns1:hasMinimumTensileStrength <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_min_specimen_1> ;
     ns1:hasKitem <https://w3id.org/steel/ProcessOntology/Kitem/kitem_1> .
 
 <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#specimen_2> a ns1:Specimen ;
     ns1:hasIdentifier "specimen_2"^^xsd:string ;
     ns1:hasMaterial <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#Material_specimen_2> ;
     ns1:hasYoungsModulus <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#YoungsModulus_specimen_2> ;
+    ns1:hasMaximumTensileStrength <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_max_specimen_2> ;
+    ns1:hasMinimumTensileStrength <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_min_specimen_2> ;
     ns1:hasKitem <https://w3id.org/steel/ProcessOntology/Kitem/kitem_2>, <https://w3id.org/steel/ProcessOntology/Kitem/kitem_3> .
 
 <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#specimen_3> a ns1:Specimen ;
     ns1:hasIdentifier "specimen_3"^^xsd:string ;
     ns1:hasMaterial <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#Material_specimen_3> ;
     ns1:hasYoungsModulus <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#YoungsModulus_specimen_3> ;
+    ns1:hasMaximumTensileStrength <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_max_specimen_3> ;
+    ns1:hasMinimumTensileStrength <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_min_specimen_3> ;
     ns1:hasKitem <https://w3id.org/steel/ProcessOntology/Kitem/kitem_4> .
 
 
@@ -138,6 +165,30 @@
 <https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#YoungsModulus_specimen_3> a ns1:YoungsModulus ;
     ns2:hasUnit "http://qudt.org/vocab/unit/GigaPA"^^xsd:anyURI ;
     ns2:value 300, 400 .
+
+<https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_max_specimen_1> a ns1:TensileStrength ;
+    ns2:hasUnit "http://qudt.org/vocab/unit/MegaPA"^^xsd:anyURI ;
+    ns2:value 200 .
+
+<https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_max_specimen_2> a ns1:TensileStrength ;
+    ns2:hasUnit "http://qudt.org/vocab/unit/MegaPA"^^xsd:anyURI ;
+    ns2:value 300 .
+
+<https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_max_specimen_3> a ns1:TensileStrength ;
+    ns2:hasUnit "http://qudt.org/vocab/unit/MegaPA"^^xsd:anyURI ;
+    ns2:value 400 .
+
+<https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_min_specimen_1> a ns1:TensileStrength ;
+    ns2:hasUnit "http://qudt.org/vocab/unit/MegaPA"^^xsd:anyURI ;
+    ns2:value 100 .
+
+<https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_min_specimen_2> a ns1:TensileStrength ;
+    ns2:hasUnit "http://qudt.org/vocab/unit/MegaPA"^^xsd:anyURI ;
+    ns2:value 200 .
+
+<https://w3id.org/emmo/domain/domain-nanoindentation/nanoindentation#tensile_strength_min_specimen_3> a ns1:TensileStrength ;
+    ns2:hasUnit "http://qudt.org/vocab/unit/MegaPA"^^xsd:anyURI ;
+    ns2:value 300 .
 """
 
 EXPECTED = """