Rakefile in erubi-1.9.0 vs Rakefile in erubi-1.10.0

@@ -58,12 +58,10 @@
   spec.call('COVERAGE'=>'1')
 end
   
 desc "Run specs with -w, some warnings filtered"
 task "spec_w" do
-  ENV['RUBYOPT'] ? (ENV['RUBYOPT'] += " -w") : (ENV['RUBYOPT'] = '-w')
-  rake = ENV['RAKE'] || "#{FileUtils::RUBY} -S rake"
-  sh %{#{rake} 2>&1 | egrep -v \": warning: instance variable @.* not initialized|: warning: method redefined; discarding old|: warning: previous definition of|: warning: statement not reached"}
+  sh "#{FileUtils::RUBY} test/test_w.rb"
 end
 
 ### Other
 
 desc "Start an IRB shell using the extension"