1 files changed, 15 insertions, 0 deletions
diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index f61466c035..ac4b5870eb 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -1326,4 +1326,19 @@ class TestRubyOptions < Test::Unit::TestCase
     assert_ruby_status([env, "-e;"])
     assert_in_out_err([env, "-W"], "", [], /Free at exit is experimental and may be unstable/)
   end
+
+  def test_toplevel_ruby
+    reserved = ["", [], /::Ruby is reserved/]
+    env = {"RUBYOPT"=>""}
+    args = %w[-e Ruby=1]
+    assert_in_out_err([env, *args])
+    assert_in_out_err([env, "-w", *args], *reserved)
+    assert_in_out_err([env, "-W:deprecated", *args], *reserved)
+    assert_in_out_err([env, "-w", "-W:no-deprecated", *args])
+
+    args = ["-e", "class A; Ruby=1; end"]
+    assert_in_out_err([env, *args])
+    assert_in_out_err([env, "-w", *args])
+    assert_in_out_err([env, "-W:deprecated", *args])
+  end
 end