diff --git a/README.md b/README.md
index 40e0aa3..fb510d6 100644
--- a/README.md
+++ b/README.md
@@ -217,7 +217,7 @@ class ErbSafetyTest < ActiveSupport::TestCase
   Dir[ERB_GLOB].each do |filename|
     pathname = Pathname.new(filename).relative_path_from(Rails.root)
     test "missing javascript escapes in #{pathname}" do
-      assert_erb_safety File.read(filename)
+      assert_erb_safety(File.read(filename), filename:)
     end
   end
 end
diff --git a/lib/better_html/test_helper/safe_erb_tester.rb b/lib/better_html/test_helper/safe_erb_tester.rb
index 557ced7..9a3cac2 100644
--- a/lib/better_html/test_helper/safe_erb_tester.rb
+++ b/lib/better_html/test_helper/safe_erb_tester.rb
@@ -41,7 +41,7 @@ def assert_erb_safety(data, **options)
         options[:template_language] ||= :html
         buffer = ::Parser::Source::Buffer.new(options[:filename] || "(buffer)")
         buffer.source = data
-        parser = BetterHtml::Parser.new(buffer, **options)
+        parser = BetterHtml::Parser.new(buffer, template_language: options[:template_language])
 
         tester_classes = [
           SafeErb::NoStatements,