Write & read dummy gems binarily

So that they have exactly the same content in all platforms.

2 files changed, 2 insertions, 2 deletions

diff --git a/spec/install/redownload_spec.rb b/spec/install/redownload_spec.rb
index 818c33bd61..c880b8bb15 100644
--- a/spec/install/redownload_spec.rb
+++ b/spec/install/redownload_spec.rb
@@ -17,7 +17,7 @@ RSpec.describe "bundle install" do
       bundle! :install, flag => true
 
       expect(out).to include "Installing rack 1.0.0"
-      expect(rack_lib.open(&:read)).to eq("RACK = '1.0.0'\n")
+      expect(rack_lib.binread).to eq("RACK = '1.0.0'\n")
       expect(the_bundle).to include_gems "rack 1.0.0"
     end
 
diff --git a/spec/support/builders.rb b/spec/support/builders.rb
index 76c9fff463..4a8d699740 100644
--- a/spec/support/builders.rb
+++ b/spec/support/builders.rb
@@ -632,7 +632,7 @@ module Spec
         @files.each do |file, source|
           file = Pathname.new(path).join(file)
           FileUtils.mkdir_p(file.dirname)
-          File.open(file, "w") {|f| f.puts source }
+          File.open(file, "wb") {|f| f.puts source }
         end
         @spec.files = @files.keys
         path