diff --git a/test/workflows/iptrunk/test_modify_trunk_interface.py b/test/workflows/iptrunk/test_modify_trunk_interface.py
index 8601b8ad675bc0c287b98ad277f58bf3cc52c81e..074219de3e11f31825ecb552c2094b6f840b7823 100644
--- a/test/workflows/iptrunk/test_modify_trunk_interface.py
+++ b/test/workflows/iptrunk/test_modify_trunk_interface.py
@@ -13,36 +13,11 @@ from test.workflows import (
 from test.workflows.iptrunk.test_create_iptrunk import MockedNetboxClient
 
 
-@pytest.mark.workflow()
-@patch("gso.workflows.iptrunk.modify_trunk_interface.provisioning_proxy.provision_ip_trunk")
-@patch("gso.services.netbox_client.NetboxClient.get_available_interfaces")
-@patch("gso.services.netbox_client.NetboxClient.attach_interface_to_lag")
-@patch("gso.services.netbox_client.NetboxClient.reserve_interface")
-@patch("gso.services.netbox_client.NetboxClient.allocate_interface")
-@patch("gso.services.netbox_client.NetboxClient.free_interface")
-@patch("gso.services.netbox_client.NetboxClient.detach_interfaces_from_lag")
-def test_iptrunk_modify_trunk_interface_success(
-    mocked_detach_interfaces_from_lag,
-    mocked_free_interface,
-    mocked_allocate_interface,
-    mocked_reserve_interface,
-    mocked_attach_interface_to_lag,
-    mocked_get_available_interfaces,
-    mock_provision_ip_trunk,
-    iptrunk_subscription_factory,
-    faker,
-    data_config_filename,
-):
-    #  Set up mock return values
-    mocked_netbox = MockedNetboxClient()
-    mocked_get_available_interfaces.return_value = mocked_netbox.get_available_interfaces()
-    mocked_attach_interface_to_lag.return_value = mocked_netbox.attach_interface_to_lag()
-    mocked_reserve_interface.return_value = mocked_netbox.reserve_interface()
-    mocked_allocate_interface.return_value = mocked_netbox.allocate_interface()
-    mocked_free_interface.return_value = mocked_netbox.free_interface()
-    mocked_detach_interfaces_from_lag.return_value = mocked_netbox.detach_interfaces_from_lag()
+@pytest.fixture()
+def input_form_iptrunk_data(faker, iptrunk_subscription_factory):
 
     product_id = iptrunk_subscription_factory()
+
     new_sid = faker.geant_sid()
     new_description = faker.sentence()
     new_type = IptrunkType.LEASED
@@ -59,8 +34,7 @@ def test_iptrunk_modify_trunk_interface_success(
         {"interface_name": f"Interface{i}", "interface_description": faker.sentence()} for i in range(5)
     ]
 
-    #  Run workflow
-    initial_iptrunk_data = [
+    return [
         {"subscription_id": product_id},
         {
             "tt_number": faker.tt_number(),
@@ -80,7 +54,38 @@ def test_iptrunk_modify_trunk_interface_success(
         },
     ]
 
-    result, process_stat, step_log = run_workflow("modify_trunk_interface", initial_iptrunk_data)
+
+@pytest.mark.workflow()
+@patch("gso.workflows.iptrunk.modify_trunk_interface.provisioning_proxy.provision_ip_trunk")
+@patch("gso.services.netbox_client.NetboxClient.get_available_interfaces")
+@patch("gso.services.netbox_client.NetboxClient.attach_interface_to_lag")
+@patch("gso.services.netbox_client.NetboxClient.reserve_interface")
+@patch("gso.services.netbox_client.NetboxClient.allocate_interface")
+@patch("gso.services.netbox_client.NetboxClient.free_interface")
+@patch("gso.services.netbox_client.NetboxClient.detach_interfaces_from_lag")
+def test_iptrunk_modify_trunk_interface_success(
+    mocked_detach_interfaces_from_lag,
+    mocked_free_interface,
+    mocked_allocate_interface,
+    mocked_reserve_interface,
+    mocked_attach_interface_to_lag,
+    mocked_get_available_interfaces,
+    mock_provision_ip_trunk,
+    input_form_iptrunk_data,
+    faker,
+    data_config_filename,
+):
+    #  Set up mock return values
+    mocked_netbox = MockedNetboxClient()
+    mocked_get_available_interfaces.return_value = mocked_netbox.get_available_interfaces()
+    mocked_attach_interface_to_lag.return_value = mocked_netbox.attach_interface_to_lag()
+    mocked_reserve_interface.return_value = mocked_netbox.reserve_interface()
+    mocked_allocate_interface.return_value = mocked_netbox.allocate_interface()
+    mocked_free_interface.return_value = mocked_netbox.free_interface()
+    mocked_detach_interfaces_from_lag.return_value = mocked_netbox.detach_interfaces_from_lag()
+
+    #  Run workflow
+    result, process_stat, step_log = run_workflow("modify_trunk_interface", input_form_iptrunk_data)
 
     for _ in range(2):
         result, step_log = assert_pp_interaction_success(result, process_stat, step_log)
@@ -100,12 +105,17 @@ def test_iptrunk_modify_trunk_interface_success(
     assert mocked_detach_interfaces_from_lag.call_count == 2  # 1 time per side
 
     # Assert all subscription properties have been updated correctly
+    new_sid = input_form_iptrunk_data[1]["geant_s_sid"]
+    new_side_a_sid = input_form_iptrunk_data[2]["side_a_ae_geant_a_sid"]
+    new_side_a_ae_members = input_form_iptrunk_data[2]["side_a_ae_members"]
+    new_side_b_sid = input_form_iptrunk_data[3]["side_b_ae_geant_a_sid"]
+    new_side_b_ae_members = input_form_iptrunk_data[3]["side_b_ae_members"]
     assert subscription.description == f"IP trunk, geant_s_sid:{new_sid}"
-    assert subscription.iptrunk.geant_s_sid == new_sid
-    assert subscription.iptrunk.iptrunk_description == new_description
-    assert subscription.iptrunk.iptrunk_type == new_type
-    assert subscription.iptrunk.iptrunk_speed == new_speed
-    assert subscription.iptrunk.iptrunk_minimum_links == new_link_count
+    assert subscription.iptrunk.geant_s_sid == input_form_iptrunk_data[1]["geant_s_sid"]
+    assert subscription.iptrunk.iptrunk_description == input_form_iptrunk_data[1]["iptrunk_description"]
+    assert subscription.iptrunk.iptrunk_type == input_form_iptrunk_data[1]["iptrunk_type"]
+    assert subscription.iptrunk.iptrunk_speed == input_form_iptrunk_data[1]["iptrunk_speed"]
+    assert subscription.iptrunk.iptrunk_minimum_links == input_form_iptrunk_data[1]["iptrunk_minimum_links"]
     assert subscription.iptrunk.iptrunk_sides[0].iptrunk_side_ae_geant_a_sid == new_side_a_sid
 
     def _find_interface_by_name(interfaces: list[dict[str, str]], name: str):
@@ -126,5 +136,5 @@ def test_iptrunk_modify_trunk_interface_success(
     for member in subscription.iptrunk.iptrunk_sides[1].iptrunk_side_ae_members:
         assert (
             member.interface_description
-            == _find_interface_by_name(new_side_b_ae_members, member.interface_name)["interface_description"]
+            == _find_interface_by_name(new_side_b_ae_members , member.interface_name)["interface_description"]
         )