You can optionally supply a single parameter, which is the name of the page to which the template applies. If provided, this page will be cited in the warning.
Please refer to the index of test templates before using any template on user talk pages to warn a user. Applying the best template available for your purpose may help reduce confusion from the message you are sending.
Please remember to substitute the template—use {{subst:TestTemplatesNotice}} rather than {{TestTemplatesNotice}}.
