How can I publish test content to the newsroom without it being visible?

If you need to publish test articles, either to test a newsroom module or an external component, this can be done without them being visible on your newsroom homepage where visitors can see it. 

You can take the following steps to make your test articles invisible.

• Change the publication date to a date in the past, so the article isn't visible in carousel, headlines or featured release modules.
• Change the SEO settings of the article to 'noindex, nofollow' to avoid the article from being indexed by search engines.
• Hide the article(s) from the sitemap, archive pages, the search function. In some situations you may want to hide the article from the newsroom itself and the RSS feeds too.

If you want to test a Presspage module, you can use a custom page for this, that isn't being linked to anywhere on the newsroom. 

If you want to test an external component that pulls in an RSS feed, you could create multiple test articles and give them all the same tag, for example 'testing'. You can then create a tagfeed with this specific tag. In that case, you'll need to keep the 'RSS feed' setting in the publication settings enabled.