Change record status: 
Project: 
Introduced in branch: 
8.7.x
Introduced in version: 
8.7.0
Description: 

If an invalid schema for the system module is passed to KernelTestBase::installSchema() prior to Drupal 8.7.0, it would be silently ignored. In Drupal 8.7.0 it will trigger a deprecation notice. The behavior will be removed in Drupal 9 and a LogicException will be thrown.

Impacts: 
Module developers