Unskipping tea tests and adding protection around possible nil models #4804

All 3 570 tests pass, 7 skipped in 5m 17s

3 577 tests +17 3 570 ✅ +17 5m 17s ⏱️ -3s
286 suites + 2 7 💤 ± 0
1 files ± 0 0 ❌ ± 0

Results for commit 8a5c371. ± Comparison against earlier commit 8636b76.