diff --git a/gso/services/resource_manager.py b/gso/services/resource_manager.py
index 3dadd19c08365d6b82ae6b91e45b483e775965a5..abd359ca4c8de9a6ca62e07c3c0f260d88c46419 100644
--- a/gso/services/resource_manager.py
+++ b/gso/services/resource_manager.py
@@ -18,25 +18,20 @@ class InterfaceAllocationState(Enum):
 
 def _dummy_router_interfaces():
     return {
-        'lags': [],
-        'physical': [
-            {
-                'name': f'ifc-{x}',
-                'state': InterfaceAllocationState.AVAILABLE
-            } for x in range(250)]
+        "lags": [],
+        "physical": [{"name": f"ifc-{x}", "state": InterfaceAllocationState.AVAILABLE} for x in range(250)],
     }
 
 
 _DUMMY_INVENTORY = {
-    'fqdn-a': _dummy_router_interfaces(),
-    'fqdn-b': _dummy_router_interfaces(),
-    'fqdn-c': _dummy_router_interfaces(),
-    'fqdn-d': _dummy_router_interfaces()
+    "fqdn-a": _dummy_router_interfaces(),
+    "fqdn-b": _dummy_router_interfaces(),
+    "fqdn-c": _dummy_router_interfaces(),
+    "fqdn-d": _dummy_router_interfaces(),
 }
 
 
-def import_new_router(
-        new_router_fqdn: str, oss_params=settings.OSSParams):
+def import_new_router(new_router_fqdn: str, oss_params=settings.OSSParams):
     # TODO: this is a dummy implementation
 
     # TODO: specifiy if this should be an error (and if now, what it means)
@@ -51,90 +46,79 @@ def next_lag(router_fqdn: str, oss_params=settings.OSSParams) -> str:
 
     lag_idx = 0
     while True:
-        lag_name = f'ae-{lag_idx}'
-        if lag_name not in _DUMMY_INVENTORY[router_fqdn]['lags']:
-            _DUMMY_INVENTORY[router_fqdn]['lags'].append(lag_name)
+        lag_name = f"ae-{lag_idx}"
+        if lag_name not in _DUMMY_INVENTORY[router_fqdn]["lags"]:
+            _DUMMY_INVENTORY[router_fqdn]["lags"].append(lag_name)
             return lag_name
         lag_idx += 1
 
 
-def available_physical_interfaces(
-        router_fqdn: str, oss_params=settings.OSSParams) -> List[str]:
+def available_physical_interfaces(router_fqdn: str, oss_params=settings.OSSParams) -> List[str]:
     # TODO: this is a dummy implementation
 
     assert router_fqdn in _DUMMY_INVENTORY
 
     return [
-        ifc['name'] for ifc in _DUMMY_INVENTORY[router_fqdn]['physical']
-        if ifc['state'] == InterfaceAllocationState.AVAILABLE
+        ifc["name"]
+        for ifc in _DUMMY_INVENTORY[router_fqdn]["physical"]
+        if ifc["state"] == InterfaceAllocationState.AVAILABLE
     ]
 
 
 def _find_physical(router_fqdn: str, interface_name: str) -> dict:
     assert router_fqdn in _DUMMY_INVENTORY
-    for ifc in _DUMMY_INVENTORY[router_fqdn]['physical']:
-        if ifc['name'] == interface_name:
+    for ifc in _DUMMY_INVENTORY[router_fqdn]["physical"]:
+        if ifc["name"] == interface_name:
             return ifc
-    assert False, f'interface {interface_name} not found on {router_fqdn}'
+    raise AssertionError(f"interface {interface_name} not found on {router_fqdn}")
 
 
-def reserve_physical_interface(
-        router_fqdn: str,
-        interface_name: str,
-        oss_params=settings.OSSParams):
+def reserve_physical_interface(router_fqdn: str, interface_name: str, oss_params=settings.OSSParams):
     # TODO: this is a dummy implementation
 
     ifc = _find_physical(router_fqdn, interface_name)
-    assert ifc['state'] == InterfaceAllocationState.AVAILABLE, \
-        f'interface {router_fqdn}:{interface_name} is not available'
-    ifc['state'] = InterfaceAllocationState.RESERVED
+    assert (
+        ifc["state"] == InterfaceAllocationState.AVAILABLE
+    ), f"interface {router_fqdn}:{interface_name} is not available"
+    ifc["state"] = InterfaceAllocationState.RESERVED
 
 
-def allocate_physical_interface(
-        router_fqdn: str,
-        interface_name: str,
-        oss_params=settings.OSSParams):
+def allocate_physical_interface(router_fqdn: str, interface_name: str, oss_params=settings.OSSParams):
     # TODO: this is a dummy implementation
 
     ifc = _find_physical(router_fqdn, interface_name)
     # TODO: is there a use case for moving
     #  directly from AVAILABLE to ALLOCATED?
-    assert ifc['state'] == InterfaceAllocationState.RESERVED, \
-        f'interface {router_fqdn}:{interface_name} is not reserved'
-    ifc['state'] = InterfaceAllocationState.RESERVED
+    assert (
+        ifc["state"] == InterfaceAllocationState.RESERVED
+    ), f"interface {router_fqdn}:{interface_name} is not reserved"
+    ifc["state"] = InterfaceAllocationState.RESERVED
 
 
-def free_physical_interface(
-        router_fqdn: str,
-        interface_name: str,
-        oss_params=settings.OSSParams):
+def free_physical_interface(router_fqdn: str, interface_name: str, oss_params=settings.OSSParams):
     # TODO: this is a dummy implementation
 
     ifc = _find_physical(router_fqdn, interface_name)
     # TODO: is this really an error that should be handled?
     #  ... or is it ok to ignore this?
-    assert ifc['state'] != InterfaceAllocationState.AVAILABLE, \
-        f'interface {router_fqdn}:{interface_name} is already available'
-    ifc['state'] = InterfaceAllocationState.AVAILABLE
+    assert (
+        ifc["state"] != InterfaceAllocationState.AVAILABLE
+    ), f"interface {router_fqdn}:{interface_name} is already available"
+    ifc["state"] = InterfaceAllocationState.AVAILABLE
 
 
-def free_lag(
-        router_fqdn: str,
-        lag_name: str,
-        oss_params=settings.OSSParams):
+def free_lag(router_fqdn: str, lag_name: str, oss_params=settings.OSSParams):
     # TODO: is this a use case that should be handled?
     # e.g. who keeps track of the bundled physical interfaces?
     pass
 
 
-def remove_router(
-        router_fqdn: str, oss_params=settings.OSSParams):
+def remove_router(router_fqdn: str, oss_params=settings.OSSParams):
     # TODO: is this a use case that should be handled?
     pass
 
 
-def all_lags(
-        router_fqdn: str, oss_params=settings.OSSParams) -> List[str]:
+def all_lags(router_fqdn: str, oss_params=settings.OSSParams) -> List[str]:
     # TODO: is this a use case that should be handled?
     assert router_fqdn in _DUMMY_INVENTORY
-    return _DUMMY_INVENTORY[router_fqdn]['lags']
+    return _DUMMY_INVENTORY[router_fqdn]["lags"]
diff --git a/gso/settings.py b/gso/settings.py
index 2d527ff1eddb19ef95ba1068d2deda6b604e9c4f..a576616c0b5003f27910afe983a29b4736eac253 100644
--- a/gso/settings.py
+++ b/gso/settings.py
@@ -1,4 +1,8 @@
-"""GSO settings, ensuring that the required parameters are set correctly."""
+"""GSO settings.
+
+Ensuring that the required parameters are set correctly.
+"""
+
 import ipaddress
 import json
 import logging
@@ -76,7 +80,8 @@ class ProvisioningProxyParams(BaseSettings):
 
 
 class ResourceManagementParams(BaseSettings):
-    """TO DO: resource management parameters"""
+    """TO DO: resource management parameters."""
+
     todo: str
 
 
diff --git a/test/conftest.py b/test/conftest.py
index 1ef473a1c3cbcadb18a98932945ca3bb6c6b4ede..75ce00bc67ee6cee82d4b1ba305b7855daf9adf1 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -14,9 +14,7 @@ def configuration_data() -> dict:
         s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         yield {
             "GENERAL": {"public_hostname": "https://gap.geant.org"},
-            "RESOURCE_MANAGEMENT": {
-                'todo': 'todo'
-            },
+            "RESOURCE_MANAGEMENT": {"todo": "todo"},
             "IPAM": {
                 "INFOBLOX": {
                     "scheme": "https",
diff --git a/test/test_resource_manager.py b/test/test_resource_manager.py
index b99d547f81084544630ffb766b886d2570fb80d3..5258f4b80e7f12f85d0d194a7c2df3cbf40e2cc5 100644
--- a/test/test_resource_manager.py
+++ b/test/test_resource_manager.py
@@ -4,12 +4,11 @@ import string
 from gso.services import resource_manager
 
 
-def _random_string(
-        n=None,
-        letters=string.ascii_letters + string.digits + string.punctuation):
+def _random_string(n=None, letters=string.ascii_letters + string.digits + string.punctuation):
+    # ignoring S311 because this is a test
     if not n:
-        n = random.randint(1, 20)
-    return ''.join(random.choices(letters, k=n))
+        n = random.randint(1, 20)  # noqa: S311
+    return "".join(random.choices(letters, k=n))  # noqa: S311
 
 
 def test_new_router():
@@ -21,36 +20,28 @@ def test_new_router():
 
 def test_new_lag():
     router_name = list(resource_manager._DUMMY_INVENTORY.keys())[0]
-    new_lags = {
-        resource_manager.next_lag(router_fqdn=router_name)
-        for _ in range(10)
-    }
+    new_lags = {resource_manager.next_lag(router_fqdn=router_name) 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, interface_name=interface_name)
+    resource_manager.reserve_physical_interface(router_fqdn=router_name, 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