Fixing `start_transaction` #3346

Job	Run time
Web Frameworks 1 (latest) (3.8, ubuntu-20.04)	1m 45s
Web Frameworks 1 (latest) (3.10, ubuntu-20.04)	2m 32s
Web Frameworks 1 (latest) (3.11, ubuntu-20.04)	2m 29s
Web Frameworks 1 (latest) (3.12, ubuntu-20.04)	3m 3s
Web Frameworks 1 (pinned) (3.6, ubuntu-20.04)	1m 52s
Web Frameworks 1 (pinned) (3.7, ubuntu-20.04)	2m 2s
Web Frameworks 1 (pinned) (3.8, ubuntu-20.04)	2m 49s
Web Frameworks 1 (pinned) (3.9, ubuntu-20.04)	2m 52s
Web Frameworks 1 (pinned) (3.10, ubuntu-20.04)	2m 39s
Web Frameworks 1 (pinned) (3.11, ubuntu-20.04)	4m 49s
Web Frameworks 1 (pinned) (3.12, ubuntu-20.04)	5m 55s
All Web Frameworks 1 tests passed	4s
	32m 51s

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