diff --git a/lib/mock_redis/string_methods.rb b/lib/mock_redis/string_methods.rb
index f6fb5a4..fb9c50a 100644
--- a/lib/mock_redis/string_methods.rb
+++ b/lib/mock_redis/string_methods.rb
@@ -212,7 +212,7 @@ def mapped_msetnx(hash)
 
     # Parameter list required to ensure the ArgumentError is returned correctly
     # rubocop:disable Metrics/ParameterLists
-    def set(key, value, ex: nil, px: nil, exat: nil, pxat: nil, nx: nil, xx: nil, keepttl: nil,
+    def set(key, value, _hash = nil, ex: nil, px: nil, exat: nil, pxat: nil, nx: nil, xx: nil, keepttl: nil,
       get: nil)
       key = key.to_s
       retval = self.get(key) if get