diff --git a/lib/sidekiq/redis_connection.rb b/lib/sidekiq/redis_connection.rb
index 3719fb948..d290f024b 100644
--- a/lib/sidekiq/redis_connection.rb
+++ b/lib/sidekiq/redis_connection.rb
@@ -12,7 +12,9 @@ def create(options = {})
           options[key.to_sym] = options.delete(key)
         end
 
-        options[:url] ||= determine_redis_provider
+        if !options[:url] && (u = determine_redis_provider)
+          options[:url] = u
+        end
 
         size = if options[:size]
           options[:size]