Fix other unit tests with latest twisted #3790

Job	Run time
lint-crlf	3s
changes	2s
check-lockfile	4s
lint-newsfile	35s
check-sampleconfig	49s
Typechecking	1m 13s
lint	29s
lint-clippy	0s
lint-clippy-nightly	0s
check-schema-delta	39s
lint-pydantic	45s
lint-readme	0s
lint-rustfmt	0s
linting-done	2s
calculate-test-jobs	5s
trial-olddeps	9m 5s
complement (monolith, SQLite)	13m 51s
portdb (3.8, 11)	3m 14s
complement (monolith, Postgres)	14m 38s
portdb (3.11, 15)	3m 4s
cargo-bench	0s
complement (workers, Postgres)	22m 6s
cargo-test	0s
trial-pypy	0s
trial (3.8, sqlite, all)	6m 18s
sytest (focal)	9m 56s
trial (3.8, postgres, 11, all)	14m 27s
sytest (focal, postgres)	10m 42s
trial (3.8, sqlite)	5m 40s
sytest (focal, multi-postgres, workers)	13m 40s
sytest (focal, multi-postgres, workers, asyncio)	19m 6s
export-data	2m 14s
tests-done	3s
	2h 32m 50s

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