**Is your feature request related to a problem? Please describe.** EF7 adds support for [Table-per-concrete-type (TPC) inheritance mapping](https://learn.microsoft.com/en-us/ef/core/what-is-new/ef-core-7.0/whatsnew#table-per-concrete-type-tpc-inheritance-mapping). **Describe the solution you'd like** We should update our existing tests for resource inheritance to also cover this new way of mapping.