diff --git a/edx_rest_framework_extensions/auth/jwt/decoder.py b/edx_rest_framework_extensions/auth/jwt/decoder.py
index c6c146dd..cdcd4bbe 100644
--- a/edx_rest_framework_extensions/auth/jwt/decoder.py
+++ b/edx_rest_framework_extensions/auth/jwt/decoder.py
@@ -251,7 +251,14 @@ def _verify_jwt_signature(token, jwt_issuer, decode_symmetric_token):
 
 
 def verify_jwk_signature_using_keyset(token, key_set, aud=None, iss=None, verify_signature=True, verify_exp=True):
-
+    """
+    Verifies the JWS using the provided keyset.
+    It loops through the available keys in the keyset
+    to find that if there is any key which can be used to verify
+    the signature.
+    The audience and issuer arguments will be verified if they are passed
+    while calling the method.
+    """
     options = {
         'verify_signature': verify_signature,
         'verify_exp': verify_exp,
diff --git a/tox.ini b/tox.ini
index 9970596c..90be34ac 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,7 @@ deps =
     drf312: djangorestframework>=3.12,<3.13
     drflatest: djangorestframework
 commands = 
-    python -Wd coverage -m pytest {posargs}
+    python -m pytest --cov {posargs}
     coverage report
 
 [testenv:quality]