diff --git a/test/json/json_minefield_parser_test.rb b/test/json/json_minefield_parser_test.rb
index 17619b2d..71590325 100644
--- a/test/json/json_minefield_parser_test.rb
+++ b/test/json/json_minefield_parser_test.rb
@@ -78,7 +78,7 @@ def define_test(name, &block)
   end
 
   fixtures.each do |path|
-    payload = File.read(path)
+    payload = File.binread(path)
     name = File.basename(path, '.json')
 
     if COMMENT_TESTS.include?(name)
@@ -111,4 +111,4 @@ def define_test(name, &block)
       raise "Unexpected minefield test: #{name}"
     end
   end
-end
\ No newline at end of file
+end