diff --git a/sdk/storage/azure-storage-blob/azure/storage/blob/_serialize.py b/sdk/storage/azure-storage-blob/azure/storage/blob/_serialize.py
index a200118d2418..701a88ae408e 100644
--- a/sdk/storage/azure-storage-blob/azure/storage/blob/_serialize.py
+++ b/sdk/storage/azure-storage-blob/azure/storage/blob/_serialize.py
@@ -44,7 +44,7 @@
 
 
 def _get_match_headers(kwargs, match_param, etag_param):
-    # type: (str) -> Tuple(Dict[str, Any], Optional[str], Optional[str])
+    # type: (Dict[str, Any], str, str) -> Tuple(Dict[str, Any], Optional[str], Optional[str])
     if_match = None
     if_none_match = None
     match_condition = kwargs.pop(match_param, None)
@@ -127,7 +127,7 @@ def get_container_cpk_scope_info(kwargs):
 
 
 def get_api_version(kwargs, default):
-    # type: (Dict[str, Any]) -> str
+    # type: (Dict[str, Any], str) -> str
     api_version = kwargs.pop('api_version', None)
     if api_version and api_version not in _SUPPORTED_API_VERSIONS:
         versions = '\n'.join(_SUPPORTED_API_VERSIONS)