diff --git a/Library/Homebrew/cask/audit.rb b/Library/Homebrew/cask/audit.rb
index db3ffb71e3..ebd9c8035c 100644
--- a/Library/Homebrew/cask/audit.rb
+++ b/Library/Homebrew/cask/audit.rb
@@ -571,15 +571,15 @@ module Cask
     def check_https_availability
       return unless download
 
-      if !cask.url.blank? && !cask.url.using
-        check_url_for_https_availability(cask.url, user_agents: [cask.url.user_agent])
-      end
-      check_url_for_https_availability(cask.appcast) unless cask.appcast.blank?
-      check_url_for_https_availability(cask.homepage, user_agents: [:browser]) unless cask.homepage.blank?
+      check_url_for_https_availability(cask.url, user_agents: [cask.url.user_agent]) if cask.url && !cask.url.using
+
+      check_url_for_https_availability(cask.appcast, check_content: true) if cask.appcast && appcast?
+
+      check_url_for_https_availability(cask.homepage, check_content: true, user_agents: [:browser]) if cask.homepage
     end
 
-    def check_url_for_https_availability(url_to_check, user_agents: [:default])
-      problem = curl_check_http_content(url_to_check.to_s, user_agents: user_agents)
+    def check_url_for_https_availability(url_to_check, **options)
+      problem = curl_check_http_content(url_to_check.to_s, **options)
       add_error problem if problem
     end
   end