Fix downgrade CI #453

Job	Run time
downgrade (1.10, adjoint)	6m 37s
downgrade (1.10, core)	10m 55s
downgrade (1.10, alloc_check)	3m 43s
test (1.10, ubuntu-latest, core)	10m 55s
test (1.10, ubuntu-latest, adjoint)	6m 24s
test (1.10, ubuntu-latest, alloc_check)	3m 41s
test (1, ubuntu-latest, core)	20m 37s
test (1, ubuntu-latest, adjoint)	14m 6s
test (1.10, macos-latest, adjoint)	3m 47s
test (1, macos-latest, adjoint)	7m 57s
test (1, macos-latest, core)	16m 58s
test (1, ubuntu-latest, alloc_check)	9m 41s
test (1.10, macos-latest, core)	11m 48s
test (1.10, macos-latest, alloc_check)	2m 22s
test (1, macos-latest, alloc_check)	6m 0s
	2h 15m 31s

Provide feedback