diff --git a/src/ns/adapters/inbound/akafka.py b/src/ns/adapters/inbound/akafka.py
index 432dda4..f0909af 100644
--- a/src/ns/adapters/inbound/akafka.py
+++ b/src/ns/adapters/inbound/akafka.py
@@ -14,6 +14,7 @@
 # limitations under the License.
 #
 """Event subscriber details for notification events"""
+
 import ghga_event_schemas.pydantic_ as event_schemas
 from ghga_event_schemas.validation import get_validated_payload
 from hexkit.custom_types import Ascii, JsonObject
@@ -28,12 +29,12 @@ class EventSubTranslatorConfig(BaseSettings):
     """Config for the event subscriber"""
 
     notification_event_topic: str = Field(
-        ...,
+        default=...,
         description="Name of the event topic used to track notification events",
         examples=["notifications"],
     )
     notification_event_type: str = Field(
-        ...,
+        default=...,
         description="The type to use for events containing content to be sent",
         examples=["notification"],
     )
@@ -56,7 +57,7 @@ async def _send_notification(self, *, payload: JsonObject):
         await self._notifier.send_notification(notification=validated_payload)
 
     async def _consume_validated(
-        self, *, payload: JsonObject, type_: Ascii, topic: Ascii
+        self, *, payload: JsonObject, type_: Ascii, topic: Ascii, key: Ascii
     ) -> None:
         """Consumes an event"""
         if (
diff --git a/src/ns/adapters/outbound/smtp_client.py b/src/ns/adapters/outbound/smtp_client.py
index 42b969e..b800276 100644
--- a/src/ns/adapters/outbound/smtp_client.py
+++ b/src/ns/adapters/outbound/smtp_client.py
@@ -15,6 +15,7 @@
 #
 
 """Contains the smtp client adapter"""
+
 import logging
 import smtplib
 import ssl
@@ -31,10 +32,14 @@
 class SmtpClientConfig(BaseSettings):
     """Configuration details for the SmtpClient"""
 
-    smtp_host: str = Field(..., description="The mail server host to connect to")
-    smtp_port: int = Field(..., description="The port for the mail server connection")
-    login_user: str = Field(..., description="The login username or email")
-    login_password: SecretStr = Field(..., description="The login password")
+    smtp_host: str = Field(
+        default=..., description="The mail server host to connect to"
+    )
+    smtp_port: int = Field(
+        default=..., description="The port for the mail server connection"
+    )
+    login_user: str = Field(default=..., description="The login username or email")
+    login_password: SecretStr = Field(default=..., description="The login password")
     use_starttls: bool = Field(
         default=True, description="Boolean flag indicating the use of STARTTLS"
     )