diff --git a/node_modules/dialog-polyfill/test-invalid.html b/node_modules/dialog-polyfill/test-invalid.html
new file mode 100644
index 0000000..70bc984
--- /dev/null
+++ b/node_modules/dialog-polyfill/test-invalid.html
@@ -0,0 +1 @@
+This page should not load.
\ No newline at end of file