diff --git a/test/backend/simple_test.rb b/test/backend/simple_test.rb
index ce9762dc..5c5955c3 100644
--- a/test/backend/simple_test.rb
+++ b/test/backend/simple_test.rb
@@ -97,10 +97,12 @@ def setup
 
   test "simple load_json: loads data from a JSON file" do
     data, _ = I18n.backend.send(:load_json, "#{locales_dir}/en.json")
-    assert_equal({ :en => { :foo => { :bar => 'baz' } } }, data)
 
     if JSON.respond_to?(:load_file)
+      assert_equal({ :en => { :foo => { :bar => 'baz' } } }, data)
       assert_predicate data.dig(:en, :foo, :bar), :frozen?
+    else
+      assert_equal({ 'en' => { 'foo' => { 'bar' => 'baz' } } }, data)
     end
   end