diff --git a/activerecord/test/cases/fixtures_test.rb b/activerecord/test/cases/fixtures_test.rb
index b07d4f3521..eb3f03c91d 100644
--- a/activerecord/test/cases/fixtures_test.rb
+++ b/activerecord/test/cases/fixtures_test.rb
@@ -185,7 +185,7 @@ class FixturesTest < ActiveRecord::TestCase
 
   def test_binary_in_fixtures
     assert_equal 1, @binaries.size
-    data = File.read(ASSETS_ROOT + "/flowers.jpg")
+    data = File.open(ASSETS_ROOT + "/flowers.jpg", 'rb') { |f| f.read }
     data.force_encoding('ASCII-8BIT') if data.respond_to?(:force_encoding)
     data.freeze
     assert_equal data, @flowers.data