diff --git a/test/regression/520.wren b/test/regression/520.wren
new file mode 100644
index 00000000..6eddf921
--- /dev/null
+++ b/test/regression/520.wren
@@ -0,0 +1,2 @@
+// This file should have a UTF-8 byte order mark
+System.print("ok") // expect: ok