tests: remove lax-no-cover pragmas by moving assertions before cancel… #1107

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	40s
checks / test (3.12, locked, windows-latest)	3m 21s
checks / test (3.11, locked, windows-latest)	2m 24s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 6s
checks / test (3.10, locked, windows-latest)	2m 5s
checks / test (3.11, lowest-direct, windows-latest)	2m 30s
checks / test (3.13, lowest-direct, windows-latest)	3m 14s
checks / test (3.11, locked, ubuntu-latest)	48s
checks / test (3.13, locked, windows-latest)	2m 8s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 3s
checks / test (3.12, locked, ubuntu-latest)	56s
checks / test (3.12, lowest-direct, windows-latest)	4m 41s
checks / test (3.14, locked, ubuntu-latest)	2m 30s
checks / test (3.13, lowest-direct, ubuntu-latest)	52s
checks / test (3.10, lowest-direct, ubuntu-latest)	55s
checks / test (3.14, locked, windows-latest)	3m 6s
checks / test (3.10, locked, ubuntu-latest)	54s
checks / test (3.14, lowest-direct, windows-latest)	2m 45s
checks / test (3.13, locked, ubuntu-latest)	49s
checks / test (3.10, lowest-direct, windows-latest)	2m 46s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 20s
all-green	4s
	41m 8s

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