diff --git a/app/clients/__init__.py b/app/clients/__init__.py
index c6b620517..1946f70e6 100644
--- a/app/clients/__init__.py
+++ b/app/clients/__init__.py
@@ -1,3 +1,6 @@
+from abc import abstractmethod
+from typing import Protocol
+
 from botocore.config import Config
 
 AWS_CLIENT_CONFIG = Config(
@@ -22,12 +25,14 @@ class ClientException(Exception):
     pass
 
 
-class Client(object):
+class Client(Protocol):
     """
     Base client for sending notifications.
     """
 
-    pass
+    @abstractmethod
+    def init_app(self, current_app, *args, **kwargs):
+        raise NotImplementedError("TODO: Need to implement.")
 
 
 class NotificationProviderClients(object):
diff --git a/app/clients/email/__init__.py b/app/clients/email/__init__.py
index 7a2f710a3..1855308b5 100644
--- a/app/clients/email/__init__.py
+++ b/app/clients/email/__init__.py
@@ -1,3 +1,5 @@
+from abc import abstractmethod, abstractproperty
+
 from app.clients import Client, ClientException
 
 
@@ -27,9 +29,10 @@ class EmailClient(Client):
     Base Email client for sending emails.
     """
 
+    @abstractmethod
     def send_email(self, *args, **kwargs):
         raise NotImplementedError("TODO Need to implement.")
 
-    @property
+    @abstractproperty
     def name(self):
         raise NotImplementedError("TODO Need to implement.")
diff --git a/app/clients/performance_platform/performance_platform_client.py b/app/clients/performance_platform/performance_platform_client.py
index 7e3d8c5be..ec0f6b999 100644
--- a/app/clients/performance_platform/performance_platform_client.py
+++ b/app/clients/performance_platform/performance_platform_client.py
@@ -10,7 +10,7 @@ class PerformancePlatformClient:
     def active(self):
         return self._active
 
-    def init_app(self, app):
+    def init_app(self, app, *args, **kwargs):
         self._active = app.config.get("PERFORMANCE_PLATFORM_ENABLED")
         if self.active:
             self.performance_platform_url = app.config.get("PERFORMANCE_PLATFORM_URL")
diff --git a/app/clients/sms/__init__.py b/app/clients/sms/__init__.py
index 2e7f27cdc..f3a366648 100644
--- a/app/clients/sms/__init__.py
+++ b/app/clients/sms/__init__.py
@@ -1,3 +1,6 @@
+from abc import abstractmethod, abstractproperty
+from typing import final
+
 from app.clients import Client, ClientException
 
 
@@ -10,7 +13,7 @@ class SmsClientResponseException(ClientException):
         self.message = message
 
     def __str__(self):
-        return "Message {}".format(self.message)
+        return f"Message {self.message}"
 
 
 class SmsClient(Client):
@@ -18,11 +21,14 @@ class SmsClient(Client):
     Base Sms client for sending smss.
     """
 
-    def init_app(self, *args, **kwargs):
-        raise NotImplementedError("TODO Need to implement.")
-
+    @abstractmethod
     def send_sms(self, *args, **kwargs):
         raise NotImplementedError("TODO Need to implement.")
 
-    def get_name(self):
+    @abstractproperty
+    def name(self):
         raise NotImplementedError("TODO Need to implement.")
+
+    @final
+    def get_name(self):
+        return self.name
diff --git a/app/clients/sms/aws_sns.py b/app/clients/sms/aws_sns.py
index 1061ec9ce..d75122a7e 100644
--- a/app/clients/sms/aws_sns.py
+++ b/app/clients/sms/aws_sns.py
@@ -43,9 +43,6 @@ class AwsSnsClient(SmsClient):
     def name(self):
         return "sns"
 
-    def get_name(self):
-        return self.name
-
     def _valid_sender_number(self, sender):
         return sender and re.match(self._valid_sender_regex, sender)
 
diff --git a/tests/app/clients/test_sms.py b/tests/app/clients/test_sms.py
index 5718cbc81..f2a5abfed 100644
--- a/tests/app/clients/test_sms.py
+++ b/tests/app/clients/test_sms.py
@@ -10,6 +10,12 @@ def fake_client(notify_api):
         def name(self):
             return "fake"
 
+        def init_app(self, current_app, *args, **kwargs):
+            pass
+
+        def send_sms(self, *args, **kwargs):
+            pass
+
     fake_client = FakeSmsClient()
     # fake_client.init_app(notify_api)
     return fake_client