diff --git a/lib/faraday/error.rb b/lib/faraday/error.rb
index 18241a473..2152d6603 100644
--- a/lib/faraday/error.rb
+++ b/lib/faraday/error.rb
@@ -85,7 +85,7 @@ def initialize(exc = 'timeout', response = nil)
 
   # Raised by Faraday::Response::RaiseError in case of a nil status in response.
   class NilStatusError < ServerError
-    def initialize(response = nil)
+    def initialize(_exc, response: nil)
       message = 'http status could not be derived from the server response'
       super(message, response)
     end
diff --git a/lib/faraday/response/raise_error.rb b/lib/faraday/response/raise_error.rb
index 4ac8b15c7..3425d1a60 100644
--- a/lib/faraday/response/raise_error.rb
+++ b/lib/faraday/response/raise_error.rb
@@ -29,7 +29,7 @@ def on_complete(env)
         when 422
           raise Faraday::UnprocessableEntityError, response_values(env)
         when nil
-          raise Faraday::NilStatusError, response_values(env)
+          raise Faraday::NilStatusError, response: response_values(env)
         when ClientErrorStatuses
           raise Faraday::ClientError, response_values(env)
         when ServerErrorStatuses