diff --git a/gso/services/resource_manager.py b/gso/services/resource_manager.py
index 61e359e300c3c6dbd168973fb2449571d84073fd..b9169a8b2959d42d632951c291978408ed197ae5 100644
--- a/gso/services/resource_manager.py
+++ b/gso/services/resource_manager.py
@@ -73,7 +73,9 @@ def _find_physical(router_fqdn: str, interface_name: str) -> dict:
     raise AssertionError(f"interface {interface_name} not found on {router_fqdn}")
 
 
-def reserve_physical_interface(router_fqdn: str, interface_name: str, subscription_id: str, oss_params=settings.OSSParams):
+def reserve_physical_interface(
+    router_fqdn: str, interface_name: str, subscription_id: str, oss_params=settings.OSSParams
+):
     # TODO: this is a dummy implementation
 
     ifc = _find_physical(router_fqdn, interface_name)
diff --git a/test/test_resource_manager.py b/test/test_resource_manager.py
index d81b5cacd8f0fac341899568840034defbf3dcb2..34cf53506c94d37bc36cfbae31d6998cf88a7a30 100644
--- a/test/test_resource_manager.py
+++ b/test/test_resource_manager.py
@@ -14,46 +14,38 @@ def _random_string(n=None, letters=string.ascii_letters + string.digits + string
 def test_new_router():
     router_name = _random_string(10)
     assert router_name not in resource_manager._DUMMY_INVENTORY
-    resource_manager.import_new_router(
-        new_router_fqdn=router_name,
-        subscription_id=_random_string(10))
+    resource_manager.import_new_router(new_router_fqdn=router_name, subscription_id=_random_string(10))
     assert router_name in resource_manager._DUMMY_INVENTORY
 
 
 def test_new_lag():
     router_name = list(resource_manager._DUMMY_INVENTORY.keys())[0]
     new_lags = {
-        resource_manager.next_lag(
-            router_fqdn=router_name, subscription_id=_random_string(10))
-        for _ in range(10)}
+        resource_manager.next_lag(router_fqdn=router_name, subscription_id=_random_string(10)) for _ in range(10)
+    }
     assert len(new_lags) == 10
-    assert new_lags <= set(
-        resource_manager._DUMMY_INVENTORY[router_name]["lags"])
+    assert new_lags <= set(resource_manager._DUMMY_INVENTORY[router_name]["lags"])
 
 
 def test_physical_allocation_lifecycle_happy():
     router_name = list(resource_manager._DUMMY_INVENTORY.keys())[0]
 
     def _interfaces():
-        return resource_manager.available_physical_interfaces(
-            router_fqdn=router_name)
+        return resource_manager.available_physical_interfaces(router_fqdn=router_name)
 
     initial_available = _interfaces()
 
     interface_name = initial_available[0]
 
     resource_manager.reserve_physical_interface(
-        router_fqdn=router_name,
-        subscription_id=_random_string(10),
-        interface_name=interface_name)
+        router_fqdn=router_name, subscription_id=_random_string(10), interface_name=interface_name
+    )
 
     current_available = _interfaces()
     assert interface_name not in current_available
 
-    resource_manager.allocate_physical_interface(
-        router_fqdn=router_name, interface_name=interface_name)
-    resource_manager.free_physical_interface(
-        router_fqdn=router_name, interface_name=interface_name)
+    resource_manager.allocate_physical_interface(router_fqdn=router_name, interface_name=interface_name)
+    resource_manager.free_physical_interface(router_fqdn=router_name, interface_name=interface_name)
 
     current_available = _interfaces()
     assert interface_name in current_available