diff --git a/antarest/study/business/binding_constraint_management.py b/antarest/study/business/binding_constraint_management.py
index 36f3351e6f..c09968c740 100644
--- a/antarest/study/business/binding_constraint_management.py
+++ b/antarest/study/business/binding_constraint_management.py
@@ -233,7 +233,7 @@ def create_binding_constraint(
 
         # Validates the matrices. Needed when the study is a variant because we only append the command to the list
         if isinstance(study, VariantStudy):
-            command.fill_matrices(version, True)
+            command.validates_and_fills_matrices(version, True)
 
         file_study = self.storage_service.get_storage(study).get_raw(study)
         execute_or_add_commands(study, file_study, [command], self.storage_service)
@@ -280,7 +280,7 @@ def update_binding_constraint(
         command = UpdateBindingConstraint(**args)
         # Validates the matrices. Needed when the study is a variant because we only append the command to the list
         if isinstance(study, VariantStudy):
-            command.fill_matrices(study_version, False)
+            command.validates_and_fills_matrices(study_version, False)
 
         execute_or_add_commands(study, file_study, [command], self.storage_service)
 
diff --git a/antarest/study/storage/variantstudy/model/command/create_binding_constraint.py b/antarest/study/storage/variantstudy/model/command/create_binding_constraint.py
index df6800fffb..5a90f0a5b6 100644
--- a/antarest/study/storage/variantstudy/model/command/create_binding_constraint.py
+++ b/antarest/study/storage/variantstudy/model/command/create_binding_constraint.py
@@ -178,7 +178,7 @@ def get_corresponding_matrices(self, v: Optional[Union[MatrixType, str]], old: b
         # pragma: no cover
         raise TypeError(repr(v))
 
-    def fill_matrices(self, version: int, create: bool) -> None:
+    def validates_and_fills_matrices(self, version: int, create: bool) -> None:
         if version < 870:
             self.values = self.get_corresponding_matrices(self.values, old=True, create=create)
         else:
@@ -209,7 +209,7 @@ def _apply(self, study_data: FileStudy) -> CommandOutput:
         binding_constraints = study_data.tree.get(["input", "bindingconstraints", "bindingconstraints"])
         new_key = len(binding_constraints)
         bd_id = transform_name_to_id(self.name)
-        self.fill_matrices(study_data.config.version, True)
+        self.validates_and_fills_matrices(study_data.config.version, True)
 
         return apply_binding_constraint(
             study_data,
diff --git a/antarest/study/storage/variantstudy/model/command/update_binding_constraint.py b/antarest/study/storage/variantstudy/model/command/update_binding_constraint.py
index 0028b1807b..985734ec7f 100644
--- a/antarest/study/storage/variantstudy/model/command/update_binding_constraint.py
+++ b/antarest/study/storage/variantstudy/model/command/update_binding_constraint.py
@@ -53,7 +53,7 @@ def _apply(self, study_data: FileStudy) -> CommandOutput:
                 message="Failed to retrieve existing binding constraint",
             )
 
-        self.fill_matrices(study_data.config.version, False)
+        self.validates_and_fills_matrices(study_data.config.version, False)
 
         return apply_binding_constraint(
             study_data,
diff --git a/tests/integration/study_data_blueprint/test_binding_constraints.py b/tests/integration/study_data_blueprint/test_binding_constraints.py
index e6fafbf716..51f477d75a 100644
--- a/tests/integration/study_data_blueprint/test_binding_constraints.py
+++ b/tests/integration/study_data_blueprint/test_binding_constraints.py
@@ -437,38 +437,35 @@ def test_lifecycle__nominal(self, client: TestClient, user_access_token: str, st
         assert res.json()["exception"] == "CommandApplicationError"
         assert res.json()["description"] == "Binding constraint not found"
 
+    # todo : add lots of test for v8.7
+    def test_for_version_870(self, client: TestClient, admin_access_token: str, study_id: str) -> None:
+        admin_headers = {"Authorization": f"Bearer {admin_access_token}"}
+        # Upgrade study to version 870
+        res = client.put(
+            f"/v1/studies/{study_id}/upgrade",
+            headers=admin_headers,
+            params={"target_version": 870},
+        )
+        res.raise_for_status()
+        task_id = res.json()
+        task = wait_task_completion(client, admin_access_token, task_id)
+        from antarest.core.tasks.model import TaskStatus
 
-# todo : add lots of test for v8.7
-
-
-def test_87(self, client: TestClient, admin_access_token: str, study_id: str) -> None:
-    admin_headers = {"Authorization": f"Bearer {admin_access_token}"}
-    # Upgrade study to version 870
-    res = client.put(
-        f"/v1/studies/{study_id}/upgrade",
-        headers=admin_headers,
-        params={"target_version": 870},
-    )
-    res.raise_for_status()
-    task_id = res.json()
-    task = wait_task_completion(client, admin_access_token, task_id)
-    from antarest.core.tasks.model import TaskStatus
-
-    assert task.status == TaskStatus.COMPLETED, task
-
-    # Creation with wrong matrix according to version
-    res = client.post(
-        f"/v1/studies/{study_id}/bindingconstraints",
-        json={
-            "name": "binding_constraint_700",
-            "enabled": True,
-            "time_step": "hourly",
-            "operator": "less",
-            "coeffs": {},
-            "comments": "New API",
-            "values": [[]],
-        },
-        headers=admin_headers,
-    )
-    assert res.status_code == 400
-    assert res.json()["description"] == "You cannot fill 'values' as it refers to the matrix before v8.7"
+        assert task.status == TaskStatus.COMPLETED, task
+
+        # Creation with wrong matrix according to version
+        res = client.post(
+            f"/v1/studies/{study_id}/bindingconstraints",
+            json={
+                "name": "binding_constraint_700",
+                "enabled": True,
+                "time_step": "hourly",
+                "operator": "less",
+                "coeffs": {},
+                "comments": "New API",
+                "values": [[]],
+            },
+            headers=admin_headers,
+        )
+        assert res.status_code == 400
+        assert res.json()["description"] == "You cannot fill 'values' as it refers to the matrix before v8.7"