Problem/Motivation
The test Drupal\KernelTests\Core\Database\SchemaUniquePrefixedKeysIndexTest has a database driver specific testing in it and those test should extend Drupal\KernelTests\Core\Database\DriverSpecificDatabaseTestBase.
Proposed resolution
Make SchemaUniquePrefixedKeysIndexTest to extend DriverSpecificDatabaseTestBase.
Remaining tasks
Make the patch and review it.
User interface changes
None
API changes
None
Data model changes
None
Release notes snippet
None