Rack 1.5.3 back-ported rack/rack#588 via rack/rack#756.

Author: dblock

spec/grape/integration/rack_spec.rb

@@ -18,11 +18,6 @@
         'CONTENT_TYPE' => 'application/json'
       }
       env = Rack::MockRequest.env_for('/', options)
-
-      # requires Rack 1.6.0 to pass
-      # can't check explicitly version of Rack because of https://github.com/rack/rack/issues/773
-      pending 'Rack 1.6.0 is required' unless ::Rack.const_defined?(:TempfileReaper) || RUBY_PLATFORM == 'java'
-
       expect(JSON.parse(app.call(env)[2].body.first)['params_keys']).to match_array('test')
     ensure
       input.close