diff --git a/session.py b/session.py
index f83e238d5..87e1b5415 100644
--- a/session.py
+++ b/session.py
@@ -258,8 +258,7 @@ def get_json(signing_priv_key_pem: str,
 
 def get_vcard(xml_format: bool,
               session, url: str, params: {}, debug: bool,
-              version: str = __version__, http_prefix: str = 'https',
-              domain: str = 'testdomain',
+              version: str, http_prefix: str, domain: str,
               timeout_sec: int = 20, quiet: bool = False) -> {}:
     if not isinstance(url, str):
         if debug and not quiet:
@@ -337,8 +336,7 @@ def get_vcard(xml_format: bool,
 
 def download_html(signing_priv_key_pem: str,
                   session, url: str, headers: {}, params: {}, debug: bool,
-                  version: str = __version__, http_prefix: str = 'https',
-                  domain: str = 'testdomain',
+                  version: str, http_prefix: str, domain: str,
                   timeout_sec: int = 20, quiet: bool = False) -> {}:
     if not isinstance(url, str):
         if debug and not quiet:
@@ -377,8 +375,7 @@ def download_html(signing_priv_key_pem: str,
 
 def download_ssml(signing_priv_key_pem: str,
                   session, url: str, headers: {}, params: {}, debug: bool,
-                  version: str = __version__, http_prefix: str = 'https',
-                  domain: str = 'testdomain',
+                  version: str, http_prefix: str, domain: str,
                   timeout_sec: int = 20, quiet: bool = False) -> {}:
     if not isinstance(url, str):
         if debug and not quiet:
@@ -737,8 +734,7 @@ def download_image_any_mime_type(session, url: str,
 
 def get_method(method_name: str, xml_str: str,
                session, url: str, params: {}, headers: {}, debug: bool,
-               version: str = __version__, http_prefix: str = 'https',
-               domain: str = 'testdomain',
+               version: str, http_prefix: str, domain: str,
                timeout_sec: int = 20, quiet: bool = False) -> {}:
     """Part of the vcard interface
     """