After talking to @Lucas_Werkmeister_WMDE:

1. One of the wikis (test, beta) is usually spammed with test data, we want to use the other one. But which is that?
2. On the chosen wiki we might need to create the right properties and values to reference on the created items, e.g. if the scenario demands creating a TV tower item we should be able to say: InstanceOf: TV-Tower or so, so the item TV-Tower needs to be there.

Use test.wikidata.org and create the items and properties that you need but are lacking. You can even re-purpose existing items and properties if needed.

Notes from talking to @Lucas_Werkmeister_WMDE and @thiemowmde

• The only other item that will be not on test yet is an item for TV-Tower, so it can be said "InstanceOf: TV tower"
• Thiemo mentioned that Geocoordinates may not be setup yet.

Will this test be conducted in English or in German? I need to know which labels and descriptions users will see.

I created a test item at https://test.wikidata.org/wiki/Q71735, but most of the new items and properties for it only have German labels / descriptions.

In general, there’s a lot of test data on that installation, and also the property suggester seems to use Wikidata IDs (so it’s mostly useless).

The test will be conducted in German.

also the property suggester seems to use Wikidata IDs (so it’s mostly useless)

So you can't type "TV-T" and get "TV-tower" but only "Q123" – even if the we create an item "TV-Tower"?

No, you can type stuff, but the initial suggestions (before you start typing) are P31 and P279, which don’t even have German labels.

…OK, as long as it is only 2 and the "right one" comes up after brief typing, it is fine. If it is not the case, we would need to sit together and find a way around…

Right now, when you add ist ein there is an extra "duplicate" entry that could be potentially confusing and isn't present on production. Is this being used for something/can it be removed?

There’s lots of duplicate items and properties on there – I’ve generally just been changing the labels of items or properties that could be confusing.

Sweet, thanks!