Rakefile in rbs-0.12.2 vs Rakefile in rbs-0.13.0

@@ -23,14 +23,14 @@
 
   sh "#{ruby} #{__dir__}/bin/run_in_md.rb #{files.join(" ")}"
 end
 
 task :validate => :parser do
-  sh "#{ruby} #{rbs} validate"
+  sh "#{ruby} #{rbs} validate --silent"
 
   FileList["stdlib/*"].each do |path|
     next if path =~ %r{stdlib/builtin}
-    sh "#{ruby} #{rbs} -r#{File.basename(path)} validate"
+    sh "#{ruby} #{rbs} -r#{File.basename(path)} validate --silent"
   end
 end
 
 FileList["test/stdlib/**/*_test.rb"].each do |test|
   task test => :parser do