diff --git a/lambdas/mns_publisher/src/process_records.py b/lambdas/mns_publisher/src/process_records.py
index e55924d70..19792b7f3 100644
--- a/lambdas/mns_publisher/src/process_records.py
+++ b/lambdas/mns_publisher/src/process_records.py
@@ -1,6 +1,5 @@
 import json
 import os
-from typing import Tuple
 
 from aws_lambda_typing.events.sqs import SQSMessage
 
@@ -68,7 +67,7 @@ def process_record(record: SQSMessage, mns_service: MnsService | MockMnsService)
     logger.info("Successfully created MNS notification", extra={"mns_notification_id": notification_id})
 
 
-def extract_trace_ids(record: SQSMessage) -> Tuple[str, str | None]:
+def extract_trace_ids(record: SQSMessage) -> tuple[str, str | None]:
     """
     Extract identifiers for tracing from SQS record.
     Returns: Tuple of (message_id, immunisation_id)
diff --git a/lambdas/mns_publisher/tests/test_utils.py b/lambdas/mns_publisher/tests/test_utils.py
index 4c6a71c15..1783681ae 100644
--- a/lambdas/mns_publisher/tests/test_utils.py
+++ b/lambdas/mns_publisher/tests/test_utils.py
@@ -23,7 +23,7 @@ def load_sample_sqs_event() -> dict:
     Expects: lambdas/mns_publisher/tests/sqs_event.json
     """
     sample_event_path = Path(__file__).parent / "sample_data" / "sqs_event.json"
-    with open(sample_event_path, "r") as f:
+    with open(sample_event_path) as f:
         raw_event = json.load(f)
 
     if isinstance(raw_event.get("body"), dict):
diff --git a/lambdas/shared/src/common/api_clients/authentication.py b/lambdas/shared/src/common/api_clients/authentication.py
index 396d41c19..cea6107d1 100644
--- a/lambdas/shared/src/common/api_clients/authentication.py
+++ b/lambdas/shared/src/common/api_clients/authentication.py
@@ -26,7 +26,7 @@ def __init__(self, service: Service, secret_manager_client, environment, cache:
 
         self.expiry = 30
         self.secret_name = (
-            f"imms/pds/{environment}/jwt-secrets"
+            f"imms/outbound/{environment}/jwt-secrets"
             if service == Service.PDS
             else f"imms/immunization/{environment}/jwt-secrets"
         )
diff --git a/lambdas/shared/src/common/get_service_url.py b/lambdas/shared/src/common/get_service_url.py
index 9188c0750..212340e0b 100644
--- a/lambdas/shared/src/common/get_service_url.py
+++ b/lambdas/shared/src/common/get_service_url.py
@@ -1,9 +1,7 @@
-from typing import Optional
-
 from common.constants import DEFAULT_BASE_PATH, PR_ENV_PREFIX
 
 
-def get_service_url(service_env: Optional[str], service_base_path: Optional[str]) -> str:
+def get_service_url(service_env: str | None, service_base_path: str | None) -> str:
     """Sets the service URL based on service parameters derived from env vars. PR environments use internal-dev while
     we also default to this environment. The only other exceptions are preprod which maps to the Apigee int environment
     and prod which does not have a subdomain."""
@@ -22,5 +20,5 @@ def get_service_url(service_env: Optional[str], service_base_path: Optional[str]
     return f"https://{subdomain}api.service.nhs.uk/{service_base_path}"
 
 
-def is_pr_env(service_env: Optional[str]) -> bool:
+def is_pr_env(service_env: str | None) -> bool:
     return service_env is not None and service_env.startswith(PR_ENV_PREFIX)