diff --git a/ibm_cloud_sdk_core/api_exception.py b/ibm_cloud_sdk_core/api_exception.py
index 307e7fb..aa99445 100644
--- a/ibm_cloud_sdk_core/api_exception.py
+++ b/ibm_cloud_sdk_core/api_exception.py
@@ -35,7 +35,7 @@ class ApiException(Exception):
 
     def __init__(self, code: int, *, message: Optional[str] = None, http_response: Optional[Response] = None):
         # Call the base class constructor with the parameters it needs
-        super(ApiException, self).__init__(message)
+        super().__init__(message)
         self.message = message
         self.code = code
         self.http_response = http_response
diff --git a/ibm_cloud_sdk_core/cp4d_token_manager.py b/ibm_cloud_sdk_core/cp4d_token_manager.py
index acf2c5d..2902790 100644
--- a/ibm_cloud_sdk_core/cp4d_token_manager.py
+++ b/ibm_cloud_sdk_core/cp4d_token_manager.py
@@ -62,8 +62,8 @@ def __init__(self,
             url = url + '/v1/preauth/validateAuth'
         self.headers = headers
         self.proxies = proxies
-        super(CP4DTokenManager, self).__init__(url, disable_ssl_verification=disable_ssl_verification,
-                                               token_name=self.TOKEN_NAME)
+        super().__init__(url, disable_ssl_verification=disable_ssl_verification,
+                         token_name=self.TOKEN_NAME)
 
     def request_token(self) -> dict:
         """Makes a request for a token.
diff --git a/ibm_cloud_sdk_core/iam_token_manager.py b/ibm_cloud_sdk_core/iam_token_manager.py
index 568752f..913ae4f 100644
--- a/ibm_cloud_sdk_core/iam_token_manager.py
+++ b/ibm_cloud_sdk_core/iam_token_manager.py
@@ -76,7 +76,7 @@ def __init__(self,
         self.client_secret = client_secret
         self.headers = headers
         self.proxies = proxies
-        super(IAMTokenManager, self).__init__(
+        super().__init__(
             self.url, disable_ssl_verification=disable_ssl_verification, token_name=self.TOKEN_NAME)
 
     def request_token(self) -> dict:
diff --git a/test/test_jwt_token_manager.py b/test/test_jwt_token_manager.py
index 7f3489d..32093ed 100644
--- a/test/test_jwt_token_manager.py
+++ b/test/test_jwt_token_manager.py
@@ -11,8 +11,8 @@ def __init__(self, url=None, access_token=None):
         self.url = url
         self.access_token = access_token
         self.request_count = 0 # just for tests to see how  many times request was called
-        super(JWTTokenManagerMockImpl, self).__init__(url, disable_ssl_verification=access_token,
-                                                      token_name='access_token')
+        super().__init__(url, disable_ssl_verification=access_token,
+                         token_name='access_token')
 
     def request_token(self):
         self.request_count += 1