diff --git a/lib/micro/case/utils.rb b/lib/micro/case/utils.rb
index 492d22d..30bb113 100644
--- a/lib/micro/case/utils.rb
+++ b/lib/micro/case/utils.rb
@@ -33,13 +33,9 @@ def slice(hash, keys)
     def fetch_values(hash, keys, &block)
       return hash.fetch_values(*keys, &block) if respond_to?(hash, :fetch_values)
 
-      result = []
-
-      keys.each do |key|
-        result << hash.fetch(key, &block)
+      keys.each_with_object([]) do |key, values|
+        values << hash.fetch(key, &block)
       end
-
-      result
     end
   end