1 files changed, 6 insertions, 0 deletions
diff --git a/test/erb/test_erb.rb b/test/erb/test_erb.rb
index 555345a140..24f6cc5d89 100644
--- a/test/erb/test_erb.rb
+++ b/test/erb/test_erb.rb
@@ -251,6 +251,12 @@ EOS
     assert_equal("line\r\n" * 3, erb.result)
   end
 
+  def test_safe_level_warning
+    assert_warning(/#{__FILE__}:#{__LINE__ + 1}/) do
+      @erb.new("", 1)
+    end
+  end
+
   def test_invalid_trim_mode
     pend if RUBY_ENGINE == 'truffleruby'