diff --git a/gns3server/agent/web_wireshark/docker_client.py b/gns3server/agent/web_wireshark/docker_client.py
index 23c45aef5..0ee7fa339 100644
--- a/gns3server/agent/web_wireshark/docker_client.py
+++ b/gns3server/agent/web_wireshark/docker_client.py
@@ -224,7 +224,7 @@ class DockerHTTPClient:
                 return None
             raise
 
-    async def stop_container(self, container_id: str, timeout: int = 0):
+    async def stop_container(self, container_id: str, timeout: int = 0):  # noqa: ASYNC109 - operation-specific timeout is intentional
         """Stop container immediately (force kill, no graceful shutdown)."""
         await self._request("POST", f"containers/{container_id}/stop", params={"t": timeout})
 
diff --git a/gns3server/agent/web_wireshark/manager.py b/gns3server/agent/web_wireshark/manager.py
index 6efeaa19d..ec638ee4a 100644
--- a/gns3server/agent/web_wireshark/manager.py
+++ b/gns3server/agent/web_wireshark/manager.py
@@ -85,7 +85,7 @@ class WebWiresharkManager:
             logger.warning(f"Container {container_id[:12]} health check failed: {e}")
             return False
 
-    async def _exec_in_container(self, container_id: str, command: str, timeout: Optional[int] = None) -> tuple:
+    async def _exec_in_container(self, container_id: str, command: str, timeout: Optional[int] = None) -> tuple:  # noqa: ASYNC109 - operation-specific timeout is intentional
         """Execute command in container with timeout.
 
         Args:
diff --git a/gns3server/api/routes/controller/nodes.py b/gns3server/api/routes/controller/nodes.py
index bacffe34f..9a5ff928b 100644
--- a/gns3server/api/routes/controller/nodes.py
+++ b/gns3server/api/routes/controller/nodes.py
@@ -418,7 +418,12 @@ LIFECYCLE_RESPONSES: dict[int | str, dict[str, Any]] = {
 
 
 async def _run_lifecycle(
-    node: Node, action: Callable, target: str, wait: bool, timeout: int, tolerate_unsupported: bool = True
+    node: Node,
+    action: Callable,
+    target: str,
+    wait: bool,
+    timeout: int,  # noqa: ASYNC109 - operation-specific timeout is intentional
+    tolerate_unsupported: bool = True,
 ) -> dict:
     async def _run():
         try:
@@ -449,7 +454,7 @@ async def _run_lifecycle(
 async def start_node(
     start_data: Optional[dict] = None,
     wait: bool = Query(False, description="Return only when the node status is 'started'"),
-    timeout: int = Query(240, ge=1, le=3600, description="Seconds to wait when 'wait' is true"),
+    timeout: int = Query(240, ge=1, le=3600, description="Seconds to wait when 'wait' is true"),  # noqa: ASYNC109 - operation-specific timeout is intentional
     node: Node = Depends(dep_node),
 ) -> dict:
     """
@@ -469,7 +474,7 @@ async def start_node(
 )
 async def stop_node(
     wait: bool = Query(False, description="Return only when the node status is 'stopped'"),
-    timeout: int = Query(240, ge=1, le=3600, description="Seconds to wait when 'wait' is true"),
+    timeout: int = Query(240, ge=1, le=3600, description="Seconds to wait when 'wait' is true"),  # noqa: ASYNC109 - operation-specific timeout is intentional
     node: Node = Depends(dep_node),
 ) -> dict:
     """
@@ -491,7 +496,7 @@ async def stop_node(
 )
 async def suspend_node(
     wait: bool = Query(False, description="Return only when the node status is 'suspended'"),
-    timeout: int = Query(240, ge=1, le=3600, description="Seconds to wait when 'wait' is true"),
+    timeout: int = Query(240, ge=1, le=3600, description="Seconds to wait when 'wait' is true"),  # noqa: ASYNC109 - operation-specific timeout is intentional
     node: Node = Depends(dep_node),
 ) -> dict:
     """
@@ -514,7 +519,7 @@ async def suspend_node(
 )
 async def reload_node(
     wait: bool = Query(False, description="Return only when the node status is 'started'"),
-    timeout: int = Query(240, ge=1, le=3600, description="Seconds to wait when 'wait' is true"),
+    timeout: int = Query(240, ge=1, le=3600, description="Seconds to wait when 'wait' is true"),  # noqa: ASYNC109 - operation-specific timeout is intentional
     node: Node = Depends(dep_node),
 ) -> dict:
     """
diff --git a/gns3server/compute/docker/__init__.py b/gns3server/compute/docker/__init__.py
index b8edf5a21..fdb3eaf51 100644
--- a/gns3server/compute/docker/__init__.py
+++ b/gns3server/compute/docker/__init__.py
@@ -283,7 +283,7 @@ class Docker(BaseManager):
         log.debug("Query Docker %s %s params=%s data=%s Response: %s", method, path, params, data, body)
         return body
 
-    async def http_query(self, method, path, data={}, params={}, timeout=300):
+    async def http_query(self, method, path, data={}, params={}, timeout=300):  # noqa: ASYNC109 - operation-specific timeout is intentional
         """
         Makes a query to the docker daemon
 
diff --git a/gns3server/compute/docker/docker_vm.py b/gns3server/compute/docker/docker_vm.py
index c0a093942..1bd732872 100644
--- a/gns3server/compute/docker/docker_vm.py
+++ b/gns3server/compute/docker/docker_vm.py
@@ -1711,7 +1711,15 @@ class DockerVM(DockerKernelDatapathMixin, BaseNode):
             status_line = headers.split(b"\r\n", 1)[0]
             if b" 101 " not in status_line and b" 200 " not in status_line:
                 raise DockerError(f"Docker interface monitor was rejected: {status_line.decode(errors='ignore')}")
-        except (TimeoutError, DockerError, OSError, KeyError, TypeError, RuntimeError, asyncio.IncompleteReadError) as e:
+        except (
+            TimeoutError,
+            DockerError,
+            OSError,
+            KeyError,
+            TypeError,
+            RuntimeError,
+            asyncio.IncompleteReadError,
+        ) as e:
             if "writer" in locals():
                 await self._close_interface_monitor_writer(writer)
             log.warning("Could not monitor interfaces for Docker container '%s': %s", self.name, e)
diff --git a/gns3server/compute/dynamips/dynamips_hypervisor.py b/gns3server/compute/dynamips/dynamips_hypervisor.py
index 44648ef95..6c4bb0bbb 100644
--- a/gns3server/compute/dynamips/dynamips_hypervisor.py
+++ b/gns3server/compute/dynamips/dynamips_hypervisor.py
@@ -57,7 +57,7 @@ class DynamipsHypervisor:
         self._writer = None
         self._io_lock = asyncio.Lock()
 
-    async def connect(self, timeout=10):
+    async def connect(self, timeout=10):  # noqa: ASYNC109 - operation-specific timeout is intentional
         """
         Connects to the hypervisor.
         """
diff --git a/gns3server/compute/qemu/qemu_vm.py b/gns3server/compute/qemu/qemu_vm.py
index 453ec3437..c6aed7460 100644
--- a/gns3server/compute/qemu/qemu_vm.py
+++ b/gns3server/compute/qemu/qemu_vm.py
@@ -1307,7 +1307,7 @@ class QemuVM(KernelDatapathMixin, BaseNode):
                 # already gone and sweeps nothing.
                 await self._stop_ubridge()
 
-    async def _open_qemu_monitor_connection_vm(self, timeout=10):
+    async def _open_qemu_monitor_connection_vm(self, timeout=10):  # noqa: ASYNC109 - operation-specific timeout is intentional
         """
         Opens a connection to the QEMU monitor.
 
diff --git a/gns3server/compute/ubridge/tc_probe.py b/gns3server/compute/ubridge/tc_probe.py
index f8b9c5b26..9afcbf03e 100644
--- a/gns3server/compute/ubridge/tc_probe.py
+++ b/gns3server/compute/ubridge/tc_probe.py
@@ -62,7 +62,7 @@ _bridge_tap_cache: dict[tuple[str, int, int, int], Optional[bool]] = {}
 _lock = asyncio.Lock()
 
 
-async def probe_tc_capabilities(timeout: float = 15.0):
+async def probe_tc_capabilities(timeout: float = 15.0):  # noqa: ASYNC109 - operation-specific timeout is intentional
     """
     Probe the configured uBridge's tc module once per binary identity.
 
@@ -88,7 +88,7 @@ async def probe_tc_capabilities(timeout: float = 15.0):
         return caps
 
 
-async def _probe(path, config, timeout):
+async def _probe(path, config, timeout):  # noqa: ASYNC109 - operation-specific timeout is intentional
     """
     Spawn a throwaway uBridge, ask ``tc capabilities``, tear it down.
     """
@@ -124,7 +124,7 @@ async def _probe(path, config, timeout):
         shutil.rmtree(working_dir, ignore_errors=True)
 
 
-async def probe_tap_support(timeout: float = 15.0):
+async def probe_tap_support(timeout: float = 15.0):  # noqa: ASYNC109 - operation-specific timeout is intentional
     """
     Whether this host's uBridge can create persistent TAPs (the ``tap``
     module), probed the same way as the tc report — a throwaway uBridge, the
@@ -151,7 +151,7 @@ async def probe_tap_support(timeout: float = 15.0):
         return supported
 
 
-async def _probe_tap(path, config, timeout):
+async def _probe_tap(path, config, timeout):  # noqa: ASYNC109 - operation-specific timeout is intentional
     """
     Spawn a throwaway uBridge and try to create (then delete) one persistent
     TAP. The probe device is named after a uuid so a concurrent probe on the
@@ -200,7 +200,7 @@ async def _probe_tap(path, config, timeout):
 _IOL_PROBE_BRIDGE_ID = 1050
 
 
-async def probe_iol_tap_support(timeout: float = 15.0):
+async def probe_iol_tap_support(timeout: float = 15.0):  # noqa: ASYNC109 - operation-specific timeout is intentional
     """
     Whether this host's uBridge can terminate an IOL port on a persistent
     TAP (``iol_bridge add_nio_tap``) — the anchor IOU's Ethernet ports need
@@ -229,7 +229,7 @@ async def probe_iol_tap_support(timeout: float = 15.0):
         return supported
 
 
-async def _probe_iol_tap(path, config, timeout):
+async def _probe_iol_tap(path, config, timeout):  # noqa: ASYNC109 - operation-specific timeout is intentional
     """
     Spawn a throwaway uBridge and run one add_nio_tap/delete_nio_tap cycle on
     a scratch bridge and scratch TAP — attaching works on a stopped bridge,
@@ -280,7 +280,7 @@ async def _probe_iol_tap(path, config, timeout):
         shutil.rmtree(working_dir, ignore_errors=True)
 
 
-async def probe_bridge_tap_support(timeout: float = 15.0):
+async def probe_bridge_tap_support(timeout: float = 15.0):  # noqa: ASYNC109 - operation-specific timeout is intentional
     """
     Whether this host's uBridge has ``bridge delete_nio_tap`` — the command
     that makes the bridge module's TAP leg swappable (stop -> delete -> add ->
@@ -311,7 +311,7 @@ async def probe_bridge_tap_support(timeout: float = 15.0):
         return supported
 
 
-async def _probe_bridge_tap(path, config, timeout):
+async def _probe_bridge_tap(path, config, timeout):  # noqa: ASYNC109 - operation-specific timeout is intentional
     """
     Spawn a throwaway uBridge and issue the probe command against a bridge
     name that cannot exist (uuid). The reply splits the builds: "bridge ...
diff --git a/gns3server/compute/ubridge/ubridge_hypervisor.py b/gns3server/compute/ubridge/ubridge_hypervisor.py
index 5b26e6db1..af819d1cf 100644
--- a/gns3server/compute/ubridge/ubridge_hypervisor.py
+++ b/gns3server/compute/ubridge/ubridge_hypervisor.py
@@ -58,7 +58,7 @@ class UBridgeHypervisor:
         self._reader = None
         self._writer = None
 
-    async def connect(self, timeout=10):
+    async def connect(self, timeout=10):  # noqa: ASYNC109 - operation-specific timeout is intentional
         """
         Connects to the hypervisor.
         """
diff --git a/gns3server/compute/virtualbox/__init__.py b/gns3server/compute/virtualbox/__init__.py
index 78c15d5fc..1d0007dfb 100644
--- a/gns3server/compute/virtualbox/__init__.py
+++ b/gns3server/compute/virtualbox/__init__.py
@@ -85,7 +85,7 @@ class VirtualBox(BaseManager):
         self._vboxmanage_path = vboxmanage_path
         return vboxmanage_path
 
-    async def execute(self, subcommand, args, timeout=60):
+    async def execute(self, subcommand, args, timeout=60):  # noqa: ASYNC109 - operation-specific timeout is intentional
 
         # We use a lock prevent parallel execution due to strange errors
         # reported by a user and reproduced by us.
diff --git a/gns3server/compute/vmware/__init__.py b/gns3server/compute/vmware/__init__.py
index d521b6415..6ac4fb495 100644
--- a/gns3server/compute/vmware/__init__.py
+++ b/gns3server/compute/vmware/__init__.py
@@ -344,7 +344,7 @@ class VMware(BaseManager):
 
         return self._host_type
 
-    async def execute(self, subcommand, args, timeout=120, log_level=logging.INFO):
+    async def execute(self, subcommand, args, timeout=120, log_level=logging.INFO):  # noqa: ASYNC109 - operation-specific timeout is intentional
         trial = 2
 
         while True:
@@ -361,7 +361,7 @@ class VMware(BaseManager):
                     trial -= 1
                     await asyncio.sleep(0.5)
 
-    async def _execute(self, subcommand, args, timeout=120, log_level=logging.INFO):
+    async def _execute(self, subcommand, args, timeout=120, log_level=logging.INFO):  # noqa: ASYNC109 - operation-specific timeout is intentional
         if self.host_type is None:
             await self.check_vmware_version()
 
diff --git a/gns3server/compute/vpcs/vpcs_probe.py b/gns3server/compute/vpcs/vpcs_probe.py
index af5c3a0f9..799211df8 100644
--- a/gns3server/compute/vpcs/vpcs_probe.py
+++ b/gns3server/compute/vpcs/vpcs_probe.py
@@ -57,7 +57,7 @@ _lock = asyncio.Lock()
 _NO_HOSTCONF_NEEDLE = "do not auto-configure"
 
 
-async def probe_vpcs_tap(timeout: float = 5.0) -> bool | None:
+async def probe_vpcs_tap(timeout: float = 5.0) -> bool | None:  # noqa: ASYNC109 - operation-specific timeout is intentional
     """
     Whether this host's VPCS binary can anchor a kernel link (tap mode with
     ``-n``), probed once per binary identity.
diff --git a/gns3server/controller/compute.py b/gns3server/controller/compute.py
index 29ba10e31..28adc2708 100644
--- a/gns3server/controller/compute.py
+++ b/gns3server/controller/compute.py
@@ -596,7 +596,7 @@ class Compute:
         """Returns URL for specific path at Compute"""
         return self._getUrl(path)
 
-    async def _run_http_query(self, method, path, data=None, timeout=120, raw=False, stream=False, params=None):
+    async def _run_http_query(self, method, path, data=None, timeout=120, raw=False, stream=False, params=None):  # noqa: ASYNC109 - operation-specific timeout is intentional
         async with asynctimeout(delay=timeout):
             url = self._getUrl(path)
             headers = {"content-type": "application/json"}
diff --git a/gns3server/controller/gns3vm/virtualbox_gns3_vm.py b/gns3server/controller/gns3vm/virtualbox_gns3_vm.py
index a643e1567..425a3ee5c 100644
--- a/gns3server/controller/gns3vm/virtualbox_gns3_vm.py
+++ b/gns3server/controller/gns3vm/virtualbox_gns3_vm.py
@@ -43,7 +43,7 @@ class VirtualBoxGNS3VM(BaseGNS3VM):
         self._system_properties = {}
         self._virtualbox_manager = VirtualBox()
 
-    async def _execute(self, subcommand, args, timeout=60):
+    async def _execute(self, subcommand, args, timeout=60):  # noqa: ASYNC109 - operation-specific timeout is intentional
 
         try:
             result = await self._virtualbox_manager.execute(subcommand, args, timeout)
diff --git a/gns3server/controller/gns3vm/vmware_gns3_vm.py b/gns3server/controller/gns3vm/vmware_gns3_vm.py
index ff0451463..f1d7f7c14 100644
--- a/gns3server/controller/gns3vm/vmware_gns3_vm.py
+++ b/gns3server/controller/gns3vm/vmware_gns3_vm.py
@@ -41,7 +41,7 @@ class VMwareGNS3VM(BaseGNS3VM):
     def vmx_path(self):
         return self._vmx_path
 
-    async def _execute(self, subcommand, args, timeout=60, log_level=logging.INFO):
+    async def _execute(self, subcommand, args, timeout=60, log_level=logging.INFO):  # noqa: ASYNC109 - operation-specific timeout is intentional
 
         try:
             result = await self._vmware_manager.execute(subcommand, args, timeout, log_level=log_level)
diff --git a/gns3server/db/repositories/rbac.py b/gns3server/db/repositories/rbac.py
index 93cdbe32a..2afb6b073 100644
--- a/gns3server/db/repositories/rbac.py
+++ b/gns3server/db/repositories/rbac.py
@@ -331,7 +331,7 @@ class RbacRepository(BaseRepository):
         Retrieve all user ACEs matching the user_id and privilege name.
         """
 
-        query: Select[Any, Any, Any, Any] = (
+        query: Select[tuple[Any, Any, Any, Any]] = (
             select(models.ACE.path, models.ACE.propagate, models.ACE.allowed, models.Privilege.name)
             .join(models.Privilege.roles)
             .join(models.Role.acl_entries)
@@ -349,7 +349,7 @@ class RbacRepository(BaseRepository):
         Retrieve all group ACEs matching the user_id and privilege name.
         """
 
-        query: Select[Any, Any, Any, Any] = (
+        query: Select[tuple[Any, Any, Any, Any]] = (
             select(models.ACE.path, models.ACE.propagate, models.ACE.allowed, models.Privilege.name)
             .join(models.Privilege.roles)
             .join(models.Role.acl_entries)
diff --git a/gns3server/schemas/common.py b/gns3server/schemas/common.py
index 8631e7bab..33577209b 100644
--- a/gns3server/schemas/common.py
+++ b/gns3server/schemas/common.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import Any, Optional
 
 from pydantic import BaseModel, Field, field_validator
@@ -33,7 +33,7 @@ class ErrorMessage(BaseModel):
     details: Optional[dict[str, Any]] = Field(None, description="Optional structured data about the error")
 
 
-class NodeStatus(str, Enum):
+class NodeStatus(StrEnum):
     """
     Supported node statuses.
     """
@@ -85,7 +85,7 @@ class ExtraConfig(BaseModel):
         return v
 
 
-class ConsoleType(str, Enum):
+class ConsoleType(StrEnum):
     """
     Supported console types.
     """
@@ -101,7 +101,7 @@ class ConsoleType(str, Enum):
     docker_exec = "docker_exec"
 
 
-class AuxType(str, Enum):
+class AuxType(StrEnum):
     """
     Supported auxiliary console types.
     """
diff --git a/gns3server/schemas/compute/cloud_nodes.py b/gns3server/schemas/compute/cloud_nodes.py
index e2887bbec..9f63c1757 100644
--- a/gns3server/schemas/compute/cloud_nodes.py
+++ b/gns3server/schemas/compute/cloud_nodes.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional, Union
 from uuid import UUID
 
@@ -24,17 +24,17 @@ from ..common import NodeStatus
 from ..update import PartialUpdateModel
 
 
-class HostInterfaceType(str, Enum):
+class HostInterfaceType(StrEnum):
     ethernet = "ethernet"
     tap = "tap"
 
 
-class IPAddressFamily(str, Enum):
+class IPAddressFamily(StrEnum):
     ipv4 = "ipv4"
     ipv6 = "ipv6"
 
 
-class InterfaceStatus(str, Enum):
+class InterfaceStatus(StrEnum):
     up = "up"
     down = "down"
 
@@ -66,7 +66,7 @@ class HostInterface(BaseModel):
     flags: List[str] = Field(default_factory=list, description="Interface flags")
 
 
-class EthernetType(str, Enum):
+class EthernetType(StrEnum):
     ethernet = "ethernet"
 
 
@@ -81,7 +81,7 @@ class EthernetPort(BaseModel):
     interface: str
 
 
-class TAPType(str, Enum):
+class TAPType(StrEnum):
     tap = "tap"
 
 
@@ -96,7 +96,7 @@ class TAPPort(BaseModel):
     interface: str
 
 
-class UDPType(str, Enum):
+class UDPType(StrEnum):
     udp = "udp"
 
 
@@ -113,7 +113,7 @@ class UDPPort(BaseModel):
     rport: int = Field(..., gt=0, le=65535, description="Remote port")
 
 
-class CloudConsoleType(str, Enum):
+class CloudConsoleType(StrEnum):
     telnet = "telnet"
     ssh = "ssh"
     vnc = "vnc"
diff --git a/gns3server/schemas/compute/dynamips_nodes.py b/gns3server/schemas/compute/dynamips_nodes.py
index 8d7aaed98..e8a94ca70 100644
--- a/gns3server/schemas/compute/dynamips_nodes.py
+++ b/gns3server/schemas/compute/dynamips_nodes.py
@@ -15,7 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 from uuid import UUID
 
@@ -25,7 +25,7 @@ from ..common import NodeStatus
 from ..update import PartialUpdateModel
 
 
-class DynamipsPlatform(str, Enum):
+class DynamipsPlatform(StrEnum):
     """
     Supported Dynamips Platforms.
     """
@@ -39,7 +39,7 @@ class DynamipsPlatform(str, Enum):
     c1700 = "c1700"
 
 
-class DynamipsAdapters(str, Enum):
+class DynamipsAdapters(StrEnum):
     """
     Supported Dynamips Network Modules.
     """
@@ -72,7 +72,7 @@ class DynamipsAdapters(str, Enum):
     _ = ""
 
 
-class DynamipsWics(str, Enum):
+class DynamipsWics(StrEnum):
     """
     Supported Dynamips WICs.
     """
@@ -83,7 +83,7 @@ class DynamipsWics(str, Enum):
     _ = ""
 
 
-class DynamipsConsoleType(str, Enum):
+class DynamipsConsoleType(StrEnum):
     """
     Supported Dynamips console types.
     """
@@ -93,7 +93,7 @@ class DynamipsConsoleType(str, Enum):
     none = "none"
 
 
-class DynamipsNPE(str, Enum):
+class DynamipsNPE(StrEnum):
     """
     Supported Dynamips NPE models.
     """
@@ -108,7 +108,7 @@ class DynamipsNPE(str, Enum):
     npe_g2 = "npe-g2"
 
 
-class DynamipsMidplane(str, Enum):
+class DynamipsMidplane(StrEnum):
     """
     Supported Dynamips Midplane models.
     """
diff --git a/gns3server/schemas/compute/ethernet_switch_nodes.py b/gns3server/schemas/compute/ethernet_switch_nodes.py
index 41328ca2f..e742ab5a2 100644
--- a/gns3server/schemas/compute/ethernet_switch_nodes.py
+++ b/gns3server/schemas/compute/ethernet_switch_nodes.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 from uuid import UUID
 
@@ -24,13 +24,13 @@ from ..common import NodeStatus
 from ..update import PartialUpdateModel
 
 
-class EthernetSwitchPortType(str, Enum):
+class EthernetSwitchPortType(StrEnum):
     access = "access"
     dot1q = "dot1q"
     qinq = "qinq"
 
 
-class EthernetSwitchEtherType(str, Enum):
+class EthernetSwitchEtherType(StrEnum):
     ethertype_8021q = "0x8100"
     ethertype_qinq = "0x88A8"
     ethertype_8021q9100 = "0x9100"
@@ -54,7 +54,7 @@ class EthernetSwitchPort(BaseModel):
         return self
 
 
-class TelnetConsoleType(str, Enum):
+class TelnetConsoleType(StrEnum):
     """
     Supported console types.
     """
diff --git a/gns3server/schemas/compute/nat_nodes.py b/gns3server/schemas/compute/nat_nodes.py
index 27cdcfc0e..042d2d58d 100644
--- a/gns3server/schemas/compute/nat_nodes.py
+++ b/gns3server/schemas/compute/nat_nodes.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional, Union
 from uuid import UUID
 
@@ -24,7 +24,7 @@ from ..common import NodeStatus
 from ..update import PartialUpdateModel
 
 
-class HostInterfaceType(str, Enum):
+class HostInterfaceType(StrEnum):
     ethernet = "ethernet"
     tap = "tap"
 
@@ -39,7 +39,7 @@ class HostInterface(BaseModel):
     special: bool = Field(..., description="Whether the interface is non standard")
 
 
-class EthernetType(str, Enum):
+class EthernetType(StrEnum):
     ethernet = "ethernet"
 
 
@@ -54,7 +54,7 @@ class EthernetPort(BaseModel):
     interface: str
 
 
-class TAPType(str, Enum):
+class TAPType(StrEnum):
     tap = "tap"
 
 
@@ -69,7 +69,7 @@ class TAPPort(BaseModel):
     interface: str
 
 
-class UDPType(str, Enum):
+class UDPType(StrEnum):
     udp = "udp"
 
 
diff --git a/gns3server/schemas/compute/nios.py b/gns3server/schemas/compute/nios.py
index a41b7eda1..425e54844 100644
--- a/gns3server/schemas/compute/nios.py
+++ b/gns3server/schemas/compute/nios.py
@@ -15,13 +15,13 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional, Union
 
 from pydantic import BaseModel, Field
 
 
-class UDPNIOType(str, Enum):
+class UDPNIOType(StrEnum):
     udp = "nio_udp"
 
 
@@ -43,7 +43,7 @@ class UDPNIO(BaseModel):
     markers: Optional[dict] = Field(None, description="Traffic-insight markers")
 
 
-class EthernetNIOType(str, Enum):
+class EthernetNIOType(StrEnum):
     ethernet = "nio_ethernet"
 
 
@@ -56,7 +56,7 @@ class EthernetNIO(BaseModel):
     ethernet_device: str = Field(..., description="Ethernet device name e.g. eth0")
 
 
-class TAPNIOType(str, Enum):
+class TAPNIOType(StrEnum):
     tap = "nio_tap"
 
 
@@ -69,7 +69,7 @@ class TAPNIO(BaseModel):
     tap_device: str = Field(..., description="TAP device name e.g. tap0")
 
 
-class BridgeNIOType(str, Enum):
+class BridgeNIOType(StrEnum):
     bridge = "nio_bridge"
 
 
@@ -108,7 +108,7 @@ class BridgeNIO(BaseModel):
     markers: Optional[dict] = Field(None, description="Traffic-insight markers (attached to the veth host end)")
 
 
-class AnchorNIOType(str, Enum):
+class AnchorNIOType(StrEnum):
     anchor = "nio_anchor"
 
 
diff --git a/gns3server/schemas/compute/qemu_nodes.py b/gns3server/schemas/compute/qemu_nodes.py
index 6e26583e2..1625afa28 100644
--- a/gns3server/schemas/compute/qemu_nodes.py
+++ b/gns3server/schemas/compute/qemu_nodes.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 from uuid import UUID
 
@@ -24,7 +24,7 @@ from ..common import CustomAdapter, NodeStatus
 from ..update import PartialUpdateModel
 
 
-class QemuPlatform(str, Enum):
+class QemuPlatform(StrEnum):
     aarch64 = "aarch64"
     alpha = "alpha"
     arm = "arm"
@@ -55,7 +55,7 @@ class QemuPlatform(str, Enum):
     xtensaeb = "xtensaeb"
 
 
-class QemuConsoleType(str, Enum):
+class QemuConsoleType(StrEnum):
     """
     Supported console types.
     """
@@ -68,7 +68,7 @@ class QemuConsoleType(str, Enum):
     none = "none"
 
 
-class QemuBootPriority(str, Enum):
+class QemuBootPriority(StrEnum):
     """
     Supported boot priority types.
     """
@@ -84,7 +84,7 @@ class QemuBootPriority(str, Enum):
     nd = "nd"
 
 
-class QemuOnCloseAction(str, Enum):
+class QemuOnCloseAction(StrEnum):
     """
     Supported actions when closing Qemu VM.
     """
@@ -94,7 +94,7 @@ class QemuOnCloseAction(str, Enum):
     save_vm_state = "save_vm_state"
 
 
-class QemuProcessPriority(str, Enum):
+class QemuProcessPriority(StrEnum):
     realtime = "realtime"
     very_high = "very high"
     high = "high"
@@ -103,7 +103,7 @@ class QemuProcessPriority(str, Enum):
     very_low = "very low"
 
 
-class QemuAdapterType(str, Enum):
+class QemuAdapterType(StrEnum):
     """
     Supported Qemu VM adapter types.
     """
@@ -135,7 +135,7 @@ class QemuAdapterType(str, Enum):
     vmxnet3 = "vmxnet3"
 
 
-class QemuDiskInterfaceType(str, Enum):
+class QemuDiskInterfaceType(StrEnum):
     """
     Supported Qemu VM disk interface types.
     """
diff --git a/gns3server/schemas/compute/virtualbox_nodes.py b/gns3server/schemas/compute/virtualbox_nodes.py
index cd6b6b208..ca52364d0 100644
--- a/gns3server/schemas/compute/virtualbox_nodes.py
+++ b/gns3server/schemas/compute/virtualbox_nodes.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 from uuid import UUID
 
@@ -24,7 +24,7 @@ from ..common import CustomAdapter, NodeStatus
 from ..update import PartialUpdateModel
 
 
-class VirtualBoxConsoleType(str, Enum):
+class VirtualBoxConsoleType(StrEnum):
     """
     Supported console types.
     """
@@ -34,7 +34,7 @@ class VirtualBoxConsoleType(str, Enum):
     none = "none"
 
 
-class VirtualBoxOnCloseAction(str, Enum):
+class VirtualBoxOnCloseAction(StrEnum):
     """
     Supported actions when closing VirtualBox VM.
     """
@@ -44,7 +44,7 @@ class VirtualBoxOnCloseAction(str, Enum):
     save_vm_state = "save_vm_state"
 
 
-class VirtualBoxAdapterType(str, Enum):
+class VirtualBoxAdapterType(StrEnum):
     pcnet_pci_ii = ("PCnet-PCI II (Am79C970A)",)
     pcnet_fast_iii = ("PCNet-FAST III (Am79C973)",)
     intel_pro_1000_mt_desktop = ("Intel PRO/1000 MT Desktop (82540EM)",)
diff --git a/gns3server/schemas/compute/vmware_nodes.py b/gns3server/schemas/compute/vmware_nodes.py
index 35186e17e..e46dc5c0b 100644
--- a/gns3server/schemas/compute/vmware_nodes.py
+++ b/gns3server/schemas/compute/vmware_nodes.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 from uuid import UUID
 
@@ -24,7 +24,7 @@ from ..common import CustomAdapter, NodeStatus
 from ..update import PartialUpdateModel
 
 
-class VMwareConsoleType(str, Enum):
+class VMwareConsoleType(StrEnum):
     """
     Supported console types.
     """
@@ -34,7 +34,7 @@ class VMwareConsoleType(str, Enum):
     none = "none"
 
 
-class VMwareOnCloseAction(str, Enum):
+class VMwareOnCloseAction(StrEnum):
     """
     Supported actions when closing VMware VM.
     """
@@ -44,7 +44,7 @@ class VMwareOnCloseAction(str, Enum):
     save_vm_state = "save_vm_state"
 
 
-class VMwareAdapterType(str, Enum):
+class VMwareAdapterType(StrEnum):
     """
     Supported VMware VM adapter types.
     """
diff --git a/gns3server/schemas/compute/vpcs_nodes.py b/gns3server/schemas/compute/vpcs_nodes.py
index bc1249a9e..00eb72c4f 100644
--- a/gns3server/schemas/compute/vpcs_nodes.py
+++ b/gns3server/schemas/compute/vpcs_nodes.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import Optional
 from uuid import UUID
 
@@ -24,7 +24,7 @@ from ..common import NodeStatus
 from ..update import PartialUpdateModel
 
 
-class ConsoleType(str, Enum):
+class ConsoleType(StrEnum):
     """
     Supported console types.
     """
diff --git a/gns3server/schemas/config.py b/gns3server/schemas/config.py
index d9bb78295..4a9e55e28 100644
--- a/gns3server/schemas/config.py
+++ b/gns3server/schemas/config.py
@@ -15,7 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import socket
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 
 from pydantic import BaseModel, ConfigDict, DirectoryPath, Field, FilePath, SecretStr, field_validator, model_validator
@@ -126,12 +126,12 @@ class WebWiresharkSettings(BaseModel):
     model_config = ConfigDict(validate_assignment=True, str_strip_whitespace=True)
 
 
-class ServerProtocol(str, Enum):
+class ServerProtocol(StrEnum):
     http = "http"
     https = "https"
 
 
-class UbridgeControlTransport(str, Enum):
+class UbridgeControlTransport(StrEnum):
     # TCP control channel: -H host:port. ubridge now binds loopback by default,
     # so this is reachable only locally. Retained for backward compatibility.
     tcp = "tcp"
@@ -140,7 +140,7 @@ class UbridgeControlTransport(str, Enum):
     unix = "unix"
 
 
-class BuiltinSymbolTheme(str, Enum):
+class BuiltinSymbolTheme(StrEnum):
     classic = "Classic"
     affinity_square_blue = "Affinity-square-blue"
     affinity_square_red = "Affinity-square-red"
diff --git a/gns3server/schemas/controller/appliances.py b/gns3server/schemas/controller/appliances.py
index ce1a71b98..0713496c2 100644
--- a/gns3server/schemas/controller/appliances.py
+++ b/gns3server/schemas/controller/appliances.py
@@ -16,7 +16,7 @@
 
 # Unified Pydantic model supporting both appliance registry versions using discriminated unions
 
-from enum import Enum
+from enum import StrEnum
 from typing import Annotated, List, Literal, Optional, Union
 from uuid import UUID
 
@@ -29,7 +29,7 @@ from ..common import ExtraConfig
 # ============================================================================
 
 
-class Category(str, Enum):
+class Category(StrEnum):
     """Appliance category enum"""
 
     router = "router"
@@ -39,7 +39,7 @@ class Category(str, Enum):
     guest = "guest"
 
 
-class Status(str, Enum):
+class Status(StrEnum):
     """Appliance status enum"""
 
     stable = "stable"
@@ -47,7 +47,7 @@ class Status(str, Enum):
     broken = "broken"
 
 
-class Availability(str, Enum):
+class Availability(StrEnum):
     """Image availability enum"""
 
     free = "free"
@@ -56,7 +56,7 @@ class Availability(str, Enum):
     service_contract = "service-contract"
 
 
-class Compression(str, Enum):
+class Compression(StrEnum):
     """Compression type enum"""
 
     bzip2 = "bzip2"
@@ -68,7 +68,7 @@ class Compression(str, Enum):
     field_7z = "7z"
 
 
-class DynamipsPlatform(str, Enum):
+class DynamipsPlatform(StrEnum):
     """Dynamips platform enum"""
 
     c1700 = "c1700"
@@ -80,7 +80,7 @@ class DynamipsPlatform(str, Enum):
     c7200 = "c7200"
 
 
-class DynamipsChassis(str, Enum):
+class DynamipsChassis(StrEnum):
     """Dynamips chassis enum"""
 
     chassis_1720 = "1720"
@@ -103,7 +103,7 @@ class DynamipsChassis(str, Enum):
     _ = ""
 
 
-class DynamipsSlot(str, Enum):
+class DynamipsSlot(StrEnum):
     """Dynamips slot enum"""
 
     C7200_IO_2FE = "C7200-IO-2FE"
@@ -134,7 +134,7 @@ class DynamipsSlot(str, Enum):
     _ = ""
 
 
-class DynamipsWic(str, Enum):
+class DynamipsWic(StrEnum):
     """Dynamips WIC enum"""
 
     WIC_1ENET = "WIC-1ENET"
@@ -143,14 +143,14 @@ class DynamipsWic(str, Enum):
     _ = ""
 
 
-class DynamipsMidplane(str, Enum):
+class DynamipsMidplane(StrEnum):
     """Dynamips midplane enum"""
 
     std = "std"
     vxr = "vxr"
 
 
-class DynamipsNpe(str, Enum):
+class DynamipsNpe(StrEnum):
     """Dynamips NPE enum"""
 
     npe_100 = "npe-100"
@@ -163,7 +163,7 @@ class DynamipsNpe(str, Enum):
     npe_g2 = "npe-g2"
 
 
-class QemuConsoleType(str, Enum):
+class QemuConsoleType(StrEnum):
     """Qemu console type enum"""
 
     telnet = "telnet"
@@ -174,7 +174,7 @@ class QemuConsoleType(str, Enum):
     none = "none"
 
 
-class QemuAdapterType(str, Enum):
+class QemuAdapterType(StrEnum):
     """Qemu adapter type enum"""
 
     e1000 = "e1000"
@@ -200,7 +200,7 @@ class QemuAdapterType(str, Enum):
     vmxnet3 = "vmxnet3"
 
 
-class QemuPlatform(str, Enum):
+class QemuPlatform(StrEnum):
     """Qemu platform enum"""
 
     aarch64 = "aarch64"
@@ -233,7 +233,7 @@ class QemuPlatform(str, Enum):
     xtensaeb = "xtensaeb"
 
 
-class QemuDiskInterface(str, Enum):
+class QemuDiskInterface(StrEnum):
     """Disk interface enum"""
 
     ide = "ide"
@@ -248,7 +248,7 @@ class QemuDiskInterface(str, Enum):
     none = "none"
 
 
-class QemuBootPriority(str, Enum):
+class QemuBootPriority(StrEnum):
     """Boot priority enum"""
 
     c = "c"
@@ -262,7 +262,7 @@ class QemuBootPriority(str, Enum):
     nd = "nd"
 
 
-class QemuOnClose(str, Enum):
+class QemuOnClose(StrEnum):
     """Qemu on_close action enum"""
 
     power_off = "power_off"
@@ -270,7 +270,7 @@ class QemuOnClose(str, Enum):
     save_vm_state = "save_vm_state"
 
 
-class QemuProcessPriority(str, Enum):
+class QemuProcessPriority(StrEnum):
     """Qemu process priority enum"""
 
     realtime = "realtime"
@@ -281,7 +281,7 @@ class QemuProcessPriority(str, Enum):
     very_low = "very low"
 
 
-class DockerConsoleType(str, Enum):
+class DockerConsoleType(StrEnum):
     """Docker console type enum"""
 
     telnet = "telnet"
@@ -293,13 +293,13 @@ class DockerConsoleType(str, Enum):
     docker_exec = "docker_exec"
 
 
-class ChecksumType(str, Enum):
+class ChecksumType(StrEnum):
     """Checksum type enum"""
 
     md5 = "md5"
 
 
-class TemplateType(str, Enum):
+class TemplateType(StrEnum):
     """Template type enum"""
 
     docker = "docker"
@@ -313,7 +313,7 @@ class TemplateType(str, Enum):
 # ============================================================================
 
 
-class Kvm(str, Enum):
+class Kvm(StrEnum):
     """KVM requirements enum"""
 
     require = "require"
diff --git a/gns3server/schemas/controller/computes.py b/gns3server/schemas/controller/computes.py
index f7c1fa791..873228a70 100644
--- a/gns3server/schemas/controller/computes.py
+++ b/gns3server/schemas/controller/computes.py
@@ -15,7 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import uuid
-from enum import Enum
+from enum import StrEnum
 from typing import Any, Optional, Union
 
 from pydantic import BaseModel, ConfigDict, Field, SecretStr, model_validator
@@ -29,7 +29,7 @@ from .base import DateTimeModelMixin
 from .capabilities import Capabilities
 
 
-class Protocol(str, Enum):
+class Protocol(StrEnum):
     """
     Protocol supported to communicate with a compute.
     """
diff --git a/gns3server/schemas/controller/gns3vm.py b/gns3server/schemas/controller/gns3vm.py
index 2c39a5657..1006b4ea1 100644
--- a/gns3server/schemas/controller/gns3vm.py
+++ b/gns3server/schemas/controller/gns3vm.py
@@ -14,13 +14,13 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import Optional
 
 from pydantic import BaseModel, Field
 
 
-class WhenExit(str, Enum):
+class WhenExit(StrEnum):
     """
     What to do with the VM when GNS3 VM exits.
     """
@@ -30,7 +30,7 @@ class WhenExit(str, Enum):
     keep = "keep"
 
 
-class Engine(str, Enum):
+class Engine(StrEnum):
     """
     "The engine to use for the GNS3 VM.
     """
diff --git a/gns3server/schemas/controller/images.py b/gns3server/schemas/controller/images.py
index 17eb73ad3..8b3688cbf 100644
--- a/gns3server/schemas/controller/images.py
+++ b/gns3server/schemas/controller/images.py
@@ -15,7 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from datetime import datetime
-from enum import Enum
+from enum import StrEnum
 from typing import Annotated, List, Literal, Optional
 from uuid import UUID
 
@@ -24,7 +24,7 @@ from pydantic import BaseModel, ConfigDict, Field
 from .base import DateTimeModelMixin
 
 
-class ImageType(str, Enum):
+class ImageType(StrEnum):
     qemu = "qemu"
     ios = "ios"
     iou = "iou"
diff --git a/gns3server/schemas/controller/links.py b/gns3server/schemas/controller/links.py
index e1ac4993c..5f07350f9 100644
--- a/gns3server/schemas/controller/links.py
+++ b/gns3server/schemas/controller/links.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import Annotated, List, Literal, Optional, Tuple, Union
 from uuid import UUID, uuid4
 
@@ -62,7 +62,7 @@ class LinkNodeCreate(BaseModel):
         return self
 
 
-class LinkType(str, Enum):
+class LinkType(StrEnum):
     """
     Link type.
     """
@@ -81,7 +81,7 @@ class LinkStyle(BaseModel):
     control_offset: Optional[Tuple[float, float]] = None
 
 
-class LinkFilterType(str, Enum):
+class LinkFilterType(StrEnum):
     """
     Packet filter type. The first five run on relay and kernel-datapath links
     alike; the rest are kernel-datapath only (tc netem / cls_bpf / the eBPF
diff --git a/gns3server/schemas/controller/nodes.py b/gns3server/schemas/controller/nodes.py
index ff1d90d2c..0ca9d710c 100644
--- a/gns3server/schemas/controller/nodes.py
+++ b/gns3server/schemas/controller/nodes.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional, Union
 from uuid import UUID, uuid4
 
@@ -25,7 +25,7 @@ from ..update import PartialUpdateModel
 from .labels import Label
 
 
-class NodeType(str, Enum):
+class NodeType(StrEnum):
     """
     Supported node types.
     """
@@ -56,7 +56,7 @@ class Image(BaseModel):
     filesize: Optional[int] = None
 
 
-class LinkType(str, Enum):
+class LinkType(StrEnum):
     """
     Supported link types.
     """
@@ -65,7 +65,7 @@ class LinkType(str, Enum):
     serial = "serial"
 
 
-class DataLinkType(str, Enum):
+class DataLinkType(StrEnum):
     """
     Supported data link types.
     """
diff --git a/gns3server/schemas/controller/notifications.py b/gns3server/schemas/controller/notifications.py
index 11ed85e4c..f2789d240 100644
--- a/gns3server/schemas/controller/notifications.py
+++ b/gns3server/schemas/controller/notifications.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import Any, Dict, List, Optional, Union
 from uuid import UUID
 
@@ -28,7 +28,7 @@ from .projects import Project
 from .snapshots import Snapshot
 
 
-class NotificationAction(str, Enum):
+class NotificationAction(StrEnum):
     """
     Values of the "action" field of a notification.
     """
diff --git a/gns3server/schemas/controller/pools.py b/gns3server/schemas/controller/pools.py
index f72c488d4..a550837db 100644
--- a/gns3server/schemas/controller/pools.py
+++ b/gns3server/schemas/controller/pools.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import Optional
 from uuid import UUID
 
@@ -23,7 +23,7 @@ from pydantic import BaseModel, ConfigDict, Field
 from .base import DateTimeModelMixin
 
 
-class ResourceType(str, Enum):
+class ResourceType(StrEnum):
     project = "project"
 
 
diff --git a/gns3server/schemas/controller/projects.py b/gns3server/schemas/controller/projects.py
index 138fd71ea..b0c20addc 100644
--- a/gns3server/schemas/controller/projects.py
+++ b/gns3server/schemas/controller/projects.py
@@ -16,7 +16,7 @@
 
 
 from datetime import datetime
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 from uuid import UUID
 
@@ -25,7 +25,7 @@ from pydantic import BaseModel, Field, HttpUrl
 from ..update import PartialUpdateModel
 
 
-class ProjectStatus(str, Enum):
+class ProjectStatus(StrEnum):
     """
     Supported project statuses.
     """
@@ -117,7 +117,7 @@ class NodeFile(BaseModel):
     file_type: str = Field(..., description="File type determined by the file command")
 
 
-class ProjectCompression(str, Enum):
+class ProjectCompression(StrEnum):
     """
     Supported project compression.
     """
diff --git a/gns3server/schemas/controller/rbac.py b/gns3server/schemas/controller/rbac.py
index 60ff78e96..73d36d655 100644
--- a/gns3server/schemas/controller/rbac.py
+++ b/gns3server/schemas/controller/rbac.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 from uuid import UUID
 
@@ -37,7 +37,7 @@ class Privilege(DateTimeModelMixin, PrivilegeBase):
     model_config = ConfigDict(from_attributes=True)
 
 
-class ACEType(str, Enum):
+class ACEType(StrEnum):
     user = "user"
     group = "group"
 
diff --git a/gns3server/schemas/controller/templates/__init__.py b/gns3server/schemas/controller/templates/__init__.py
index 59519318a..942de8b16 100644
--- a/gns3server/schemas/controller/templates/__init__.py
+++ b/gns3server/schemas/controller/templates/__init__.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 from uuid import UUID
 
@@ -25,7 +25,7 @@ from ..base import DateTimeModelMixin
 from ..nodes import NodeType
 
 
-class Category(str, Enum):
+class Category(StrEnum):
     """
     Supported categories
     """
diff --git a/gns3server/schemas/controller/templates/dynamips_templates.py b/gns3server/schemas/controller/templates/dynamips_templates.py
index ac43ee13f..492742b80 100644
--- a/gns3server/schemas/controller/templates/dynamips_templates.py
+++ b/gns3server/schemas/controller/templates/dynamips_templates.py
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import Optional
 
 from pydantic import Field
@@ -123,7 +123,7 @@ class C3745DynamipsTemplate(C3745DynamipsTemplateBase):
     image: str = Field(..., description="Path to the IOS image")
 
 
-class C3600ChassisType(str, Enum):
+class C3600ChassisType(StrEnum):
     chassis_3620 = "3620"
     chassis_3640 = "3640"
     chassis_3660 = "3660"
@@ -162,7 +162,7 @@ class C2691DynamipsTemplate(C2691DynamipsTemplateBase):
     image: str = Field(..., description="Path to the IOS image")
 
 
-class C2600ChassisType(str, Enum):
+class C2600ChassisType(StrEnum):
     chassis_2610 = "2610"
     chassis_2620 = "2620"
     chassis_2610xm = "2610XM"
@@ -191,7 +191,7 @@ class C2600DynamipsTemplate(C2600DynamipsTemplateBase):
     image: str = Field(..., description="Path to the IOS image")
 
 
-class C1700ChassisType(str, Enum):
+class C1700ChassisType(StrEnum):
     chassis_1720 = "1720"
     chassis_1721 = "1721"
     chassis_1750 = "1750"
diff --git a/gns3server/schemas/controller/templates/ethernet_switch_templates.py b/gns3server/schemas/controller/templates/ethernet_switch_templates.py
index 03d72e64f..a50b407e7 100644
--- a/gns3server/schemas/controller/templates/ethernet_switch_templates.py
+++ b/gns3server/schemas/controller/templates/ethernet_switch_templates.py
@@ -15,7 +15,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 
 from pydantic import Field
@@ -37,7 +37,7 @@ DEFAULT_PORTS = [
 ]
 
 
-class ConsoleType(str, Enum):
+class ConsoleType(StrEnum):
     """
     Supported console types for Ethernet switch nodes.
     """
diff --git a/gns3server/schemas/controller/topology.py b/gns3server/schemas/controller/topology.py
index 365ca5983..f13083fd2 100644
--- a/gns3server/schemas/controller/topology.py
+++ b/gns3server/schemas/controller/topology.py
@@ -19,7 +19,7 @@
 # This file contains the validation for checking a .gns3 file
 #
 
-from enum import Enum
+from enum import StrEnum
 from typing import List, Optional
 from uuid import UUID
 
@@ -37,7 +37,7 @@ class TopologyLink(Link):
     filters: Optional[dict] = None
 
 
-class TopologyType(str, Enum):
+class TopologyType(StrEnum):
     topology = "topology"
 
 
diff --git a/gns3server/schemas/qemu_disk_image.py b/gns3server/schemas/qemu_disk_image.py
index 9a3b591b9..60efddaff 100644
--- a/gns3server/schemas/qemu_disk_image.py
+++ b/gns3server/schemas/qemu_disk_image.py
@@ -14,13 +14,13 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
+from enum import StrEnum
 from typing import Optional
 
 from pydantic import BaseModel, Field
 
 
-class QemuDiskImageFormat(str, Enum):
+class QemuDiskImageFormat(StrEnum):
     """
     Supported Qemu disk image formats.
     """
@@ -33,7 +33,7 @@ class QemuDiskImageFormat(str, Enum):
     raw = "raw"
 
 
-class QemuDiskImagePreallocation(str, Enum):
+class QemuDiskImagePreallocation(StrEnum):
     """
     Supported Qemu disk image pre-allocation options.
     """
@@ -44,7 +44,7 @@ class QemuDiskImagePreallocation(str, Enum):
     full = "full"
 
 
-class QemuDiskImageOnOff(str, Enum):
+class QemuDiskImageOnOff(StrEnum):
     """
     Supported Qemu image on/off options.
     """
@@ -53,7 +53,7 @@ class QemuDiskImageOnOff(str, Enum):
     off = "off"
 
 
-class QemuDiskImageSubformat(str, Enum):
+class QemuDiskImageSubformat(StrEnum):
     """
     Supported Qemu disk image sub-format options.
     """
@@ -67,7 +67,7 @@ class QemuDiskImageSubformat(str, Enum):
     monolithic_flat = "monolithicFlat"
 
 
-class QemuDiskImageAdapterType(str, Enum):
+class QemuDiskImageAdapterType(StrEnum):
     """
     Supported Qemu disk image on/off options.
     """
diff --git a/gns3server/utils/asyncio/__init__.py b/gns3server/utils/asyncio/__init__.py
index a1abc9e10..d6f17f99e 100644
--- a/gns3server/utils/asyncio/__init__.py
+++ b/gns3server/utils/asyncio/__init__.py
@@ -85,7 +85,7 @@ async def subprocess_check_output(*args, cwd=None, env=None, stderr=False):
     return output.decode("utf-8", errors="ignore")
 
 
-async def wait_for_process_termination(process, timeout=10):
+async def wait_for_process_termination(process, timeout=10):  # noqa: ASYNC109 - operation-specific timeout is intentional
     """
     Wait for a process terminate, and raise asyncio.TimeoutError in case of
     timeout.
@@ -118,7 +118,7 @@ def monitor_process(process, termination_callback):
     asyncio.ensure_future(_check_process(process, termination_callback))
 
 
-async def wait_for_file_creation(path, timeout=60):
+async def wait_for_file_creation(path, timeout=60):  # noqa: ASYNC109 - operation-specific timeout is intentional
 
     while timeout > 0:
         if os.path.exists(path):
diff --git a/gns3server/utils/notification_queue.py b/gns3server/utils/notification_queue.py
index fcbe4c221..d4950a79c 100644
--- a/gns3server/utils/notification_queue.py
+++ b/gns3server/utils/notification_queue.py
@@ -38,7 +38,7 @@ class NotificationQueue(asyncio.Queue):
         self._first = True
         self._last_ping = None
 
-    async def get(self, timeout):
+    async def get(self, timeout):  # noqa: ASYNC109 - operation-specific timeout is intentional
         """
         Return a notification, or a ping notification with server information
         at least every `timeout` seconds. The ping used to be generated only
@@ -84,7 +84,7 @@ class NotificationQueue(asyncio.Queue):
             log.warning(f"Could not get CPU and memory usage from psutil: {e}")
         return msg
 
-    async def get_json(self, timeout):
+    async def get_json(self, timeout):  # noqa: ASYNC109 - operation-specific timeout is intentional
         """
         Get a message as a JSON
         """
diff --git a/gns3server/utils/websocket_to_websocket.py b/gns3server/utils/websocket_to_websocket.py
index 12e410ce2..51e49ba5c 100644
--- a/gns3server/utils/websocket_to_websocket.py
+++ b/gns3server/utils/websocket_to_websocket.py
@@ -40,7 +40,7 @@ async def websocket_proxy(
     target_url: str,
     requested_protocols: Optional[list] = None,
     buffer_size: int = 65536,
-    timeout: Optional[float] = None,
+    timeout: Optional[float] = None,  # noqa: ASYNC109 - operation-specific timeout is intentional
 ) -> None:
     """
     Proxy binary WebSocket data between client and target WebSocket server.
@@ -142,7 +142,7 @@ async def websocket_proxy_with_manual_accept(
     target_url: str,
     requested_protocols: Optional[list] = None,
     buffer_size: int = 65536,
-    timeout: Optional[float] = None,
+    timeout: Optional[float] = None,  # noqa: ASYNC109 - operation-specific timeout is intentional
 ) -> None:
     """
     Proxy binary WebSocket data between client and target WebSocket server.
diff --git a/tests/compute/docker/test_iol_docker_kernel_datapath.py b/tests/compute/docker/test_iol_docker_kernel_datapath.py
index 3491c128e..751b95d4d 100644
--- a/tests/compute/docker/test_iol_docker_kernel_datapath.py
+++ b/tests/compute/docker/test_iol_docker_kernel_datapath.py
@@ -64,7 +64,7 @@ async def vm(compute_project, manager):
 def _capable(vm, monkeypatch):
     """Make both anchor-lifecycle probes answer True."""
 
-    async def probe(timeout=15.0):
+    async def probe(timeout=15.0):  # noqa: ASYNC109 - mock signature must match patched API
         return True
 
     monkeypatch.setattr("gns3server.compute.docker.iol_docker_vm.probe_bridge_tap_support", probe)
@@ -110,7 +110,7 @@ async def test_prepare_tap_datapath_falls_back_without_either_probe(vm, monkeypa
     cannot carry kernel links.
     """
 
-    async def probe(timeout=15.0):
+    async def probe(timeout=15.0):  # noqa: ASYNC109 - mock signature must match patched API
         return None
 
     monkeypatch.setattr("gns3server.compute.docker.iol_docker_vm.probe_bridge_tap_support", probe)
diff --git a/tests/compute/docker/test_iol_docker_vm.py b/tests/compute/docker/test_iol_docker_vm.py
index 05cddfef7..9d6e5daa9 100644
--- a/tests/compute/docker/test_iol_docker_vm.py
+++ b/tests/compute/docker/test_iol_docker_vm.py
@@ -452,7 +452,7 @@ async def test_add_ubridge_connection_timeout_is_actionable(compute_project, man
     _mock_wiring(vm)
     vm._stop_ubridge = AsyncioMagicMock()
 
-    async def raise_timeout(path, timeout=60):
+    async def raise_timeout(path, timeout=60):  # noqa: ASYNC109 - mock signature must match patched API
         raise TimeoutError()
 
     with patch("gns3server.compute.docker.vendor_docker_vm.wait_for_file_creation", side_effect=raise_timeout):
diff --git a/tests/compute/iou/test_iou_kernel_datapath.py b/tests/compute/iou/test_iou_kernel_datapath.py
index 7121800e3..b3d947efe 100644
--- a/tests/compute/iou/test_iou_kernel_datapath.py
+++ b/tests/compute/iou/test_iou_kernel_datapath.py
@@ -60,7 +60,7 @@ async def vm(compute_project, manager):
 def _capable(vm, monkeypatch):
     """Make the iol-tap capability probe answer True."""
 
-    async def probe(timeout=15.0):
+    async def probe(timeout=15.0):  # noqa: ASYNC109 - mock signature must match patched API
         return True
 
     monkeypatch.setattr("gns3server.compute.iou.iou_vm.probe_iol_tap_support", probe)
@@ -99,7 +99,7 @@ async def test_prepare_tap_datapath_falls_back_without_the_command(vm, monkeypat
     datapath — it still starts, it just cannot carry kernel links.
     """
 
-    async def probe(timeout=15.0):
+    async def probe(timeout=15.0):  # noqa: ASYNC109 - mock signature must match patched API
         return None
 
     monkeypatch.setattr("gns3server.compute.iou.iou_vm.probe_iol_tap_support", probe)
diff --git a/tests/compute/qemu/test_qemu_kernel_datapath.py b/tests/compute/qemu/test_qemu_kernel_datapath.py
index a7226c08b..a2d57592a 100644
--- a/tests/compute/qemu/test_qemu_kernel_datapath.py
+++ b/tests/compute/qemu/test_qemu_kernel_datapath.py
@@ -358,7 +358,7 @@ async def test_stop_stops_the_process_before_deleting_the_taps(vm):
     _running(vm)
     order = []
 
-    async def fake_termination(process, timeout=None):
+    async def fake_termination(process, timeout=None):  # noqa: ASYNC109 - mock signature must match patched API
         order.append("process")
 
     async def fake_stop_ubridge():
@@ -476,7 +476,7 @@ async def test_concurrent_stops_sweep_every_tap_exactly_once(vm):
 
     vm._ubridge_send = AsyncioMagicMock(side_effect=send)
 
-    async def fake_termination(process, timeout=None):
+    async def fake_termination(process, timeout=None):  # noqa: ASYNC109 - mock signature must match patched API
         pass
 
     with (
diff --git a/tests/compute/ubridge/test_tc_probe.py b/tests/compute/ubridge/test_tc_probe.py
index 45275368c..676ba7b91 100644
--- a/tests/compute/ubridge/test_tc_probe.py
+++ b/tests/compute/ubridge/test_tc_probe.py
@@ -19,6 +19,7 @@ The standalone `tc capabilities` probe behind the compute /capabilities
 payload: spawn a throwaway uBridge, ask once, cache by binary identity.
 """
 
+import asyncio
 import os
 
 import pytest
@@ -140,10 +141,14 @@ async def test_probe_missing_binary_means_unknown(monkeypatch):
 
 async def test_probe_reprobes_when_the_binary_attributes_change(probe_env):
 
+    # Ensure following chmod changes mode even under restrictive test-process umasks.
+    os.chmod(probe_env, 0o700)
     assert await probe_tc_capabilities() is not None
     # chmod touches ctime but neither mtime nor size: a setcap/chmod remedy
     # after a permission-related probe failure must be able to flip the
-    # cached verdict without a server restart.
+    # cached verdict without a server restart. Wait for this filesystem's
+    # timestamp clock to advance before changing mode.
+    await asyncio.sleep(0.02)
     os.chmod(probe_env, 0o600)
     assert await probe_tc_capabilities() is not None
     assert FakeHypervisor.spawned == 2
diff --git a/tests/stress/telnet_race_condition_test.py b/tests/stress/telnet_race_condition_test.py
index 88e862a7b..0677c31c6 100644
--- a/tests/stress/telnet_race_condition_test.py
+++ b/tests/stress/telnet_race_condition_test.py
@@ -61,7 +61,7 @@ class TelnetClient:
             log.warning(f"Client {self.client_id}: Send failed: {e}")
             return False
 
-    async def receive_response(self, timeout: float = 1.0) -> Optional[str]:
+    async def receive_response(self, timeout: float = 1.0) -> Optional[str]:  # noqa: ASYNC109 - mock signature must match patched API
         """Receive response from server (optional)."""
         if not self.reader or not self.connected:
             return None
diff --git a/tests/utils/asyncio/test_ssh_server.py b/tests/utils/asyncio/test_ssh_server.py
index 694bfd20c..3701e08bf 100644
--- a/tests/utils/asyncio/test_ssh_server.py
+++ b/tests/utils/asyncio/test_ssh_server.py
@@ -40,7 +40,7 @@ async def _connect(port):
     )
 
 
-async def _wait_for_session_count(server, expected_count, timeout=2):
+async def _wait_for_session_count(server, expected_count, timeout=2):  # noqa: ASYNC109 - mock signature must match patched API
     deadline = asyncio.get_running_loop().time() + timeout
     last_count = 0
     while asyncio.get_running_loop().time() < deadline:
diff --git a/tests/utils/asyncio/test_telnet_server.py b/tests/utils/asyncio/test_telnet_server.py
index 08c2d8acd..8cb1a3a27 100644
--- a/tests/utils/asyncio/test_telnet_server.py
+++ b/tests/utils/asyncio/test_telnet_server.py
@@ -24,7 +24,7 @@ def _get_listen_port(server):
     return server.sockets[0].getsockname()[1]
 
 
-async def _wait_for_connection_count(server, expected_count, timeout=2):
+async def _wait_for_connection_count(server, expected_count, timeout=2):  # noqa: ASYNC109 - mock signature must match patched API
     deadline = asyncio.get_running_loop().time() + timeout
     last_count = 0
     while asyncio.get_running_loop().time() < deadline:
diff --git a/tests/utils/test_packet_filter_validation.py b/tests/utils/test_packet_filter_validation.py
index 0cbf970b3..912ad8ce5 100644
--- a/tests/utils/test_packet_filter_validation.py
+++ b/tests/utils/test_packet_filter_validation.py
@@ -4,6 +4,7 @@ Unit tests for packet filter validation.
 
 import pytest
 
+from gns3server.utils import packet_filter_validation
 from gns3server.utils.packet_filter_validation import (
     FilterValidationError,
     filter_inactive_filters,
@@ -105,15 +106,26 @@ class TestPacketFilterValidation:
         validate_filter_parameters("bpf", ["tcp port 80\nnot arp"])
         validate_filter_parameters("bpf", ["tcp and not port 22\nhost 192.168.1.1\nicmp"])
 
-    def test_bpf_multi_line_invalid(self):
+    def test_bpf_multi_line_invalid(self, monkeypatch):
         """Test multi-line BPF with invalid line."""
+        monkeypatch.setattr(
+            packet_filter_validation,
+            "validate_bpf_syntax",
+            lambda expression: {"valid": expression != "invalid!!!", "error": "syntax error"},
+        )
         with pytest.raises(FilterValidationError) as excinfo:
             validate_filter_parameters("bpf", ["tcp port 80\ninvalid!!!"])
         err = str(excinfo.value).lower()
         assert "syntax error" in err
 
-    def test_bpf_invalid(self):
+    def test_bpf_invalid(self, monkeypatch):
         """Test invalid BPF parameters."""
+        monkeypatch.setattr(
+            packet_filter_validation,
+            "validate_bpf_syntax",
+            lambda expression: {"valid": expression != "tcp port", "error": "syntax error"},
+        )
+
         # Wrong type
         with pytest.raises(FilterValidationError, match="must be a string"):
             validate_filter_parameters("bpf", [123])