trying to fix random test failures

spec/grape/middleware/formatter_spec.rb

@@ -1,12 +1,11 @@
 require 'spec_helper'
 
 describe Grape::Middleware::Formatter do
-  subject { Grape::Middleware::Formatter.new(app, options) }
+  subject { Grape::Middleware::Formatter.new(app) }
   before { allow(subject).to receive(:dup).and_return(subject) }
 
   let(:body) { { 'foo' => 'bar' } }
   let(:app) { ->(_env) { [200, {}, [body]] } }
-  let(:options) { {} }
 
   context 'serialization' do
     let(:body) { { 'abc' => 'def' } }
@@ -327,14 +326,12 @@ def self.call(_, _)
   end
 
   context 'custom parser raises exception and rescue options are enabled for backtrace and original_exception' do
-    let(:options) {
-      {
+    it 'adds the backtrace and original_exception to the error output' do
+      subject = Grape::Middleware::Formatter.new(
+        app,
         rescue_options: { backtrace: true, original_exception: true },
         parsers: { json: ->(_object, _env) { raise StandardError, 'fail' } }
-      }
-    }
-
-    it 'adds the backtrace and original_exception to the error output' do
+      )
       io = StringIO.new('{invalid}')
       error = catch(:error) {
         subject.call(