I want a simple way to be able to put the test environment to be reset

**Describe the bug**
After a while the test environment became such a mess of data it sometimes is very hard to test features because there is old data or even corrupt data.

**Expected behavior**
Something easy to reset the test environment to a set of 'good' data

The issue does not name any files, tests, or entry points. Start by locating the test-environment setup and any existing data-seeding or reset mechanisms, then determine how a known-good dataset is established. Done means the test environment can be reset easily to reproducible, valid data.

Written by the indexing model from the issue text.