Merge pull request #1750 from maths/iss1749 #3574

Job	Run time
test (8.1, MOODLE_402_STABLE, pgsql, GCL, true)	28m 48s
test (8.4, MOODLE_502_STABLE, pgsql, SBCL, true)	35m 55s
test (8.2, MOODLE_405_STABLE, mariadb, GCL, false)	50m 38s
test (8.4, main, pgsql, GCL, false)	41m 55s
test (8.2, MOODLE_500_STABLE, pgsql, SBCL, false)	19m 4s
	2h 56m 20s

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