diff --git a/test/test_coffee_script.rb b/test/test_coffee_script.rb
index 271df2b..1eecc44 100644
--- a/test/test_coffee_script.rb
+++ b/test/test_coffee_script.rb
@@ -44,7 +44,9 @@ def test_compilation_error
       # 1.6
       "SyntaxError: [stdin]:3:11: unexpected POST_IF",
       # 1.7
-      "SyntaxError: [stdin]:3:11: unexpected unless"
+      "SyntaxError: [stdin]:3:11: unexpected unless",
+      # 2.4.1
+      "[stdin]:3:11: unexpected unless"
     ]
     begin
       src = <<-EOS