Trivial fix #160

Job	Run time
CI test (make validate)	1m 6s
Code coverage (codecov)	0s
Build moodle-plugin-ci.phar	33s
Integration tests (8.3, main, true)	6m 11s
Integration tests (8.3, MOODLE_404_STABLE, true)	6m 19s
Integration tests (8.2, MOODLE_403_STABLE, true)	6m 10s
Integration tests (8.2, MOODLE_402_STABLE, true)	6m 1s
Integration tests (8.1, MOODLE_401_STABLE, true)	6m 41s
Integration tests (8.0, MOODLE_400_STABLE)	5m 53s
Integration tests (8.0, MOODLE_311_STABLE)	5m 4s
Integration tests (7.4, MOODLE_39_STABLE)	5m 11s
SelfUpdate tests (PHAR) (8.3)	33s
SelfUpdate tests (PHAR) (8.2)	31s
Integration tests (PHAR) (8.3, main, true)	6m 2s
SelfUpdate tests (PHAR) (8.1)	25s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE, true)	6m 10s
SelfUpdate tests (PHAR) (8.0)	28s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE, true)	5m 58s
SelfUpdate tests (PHAR) (7.4)	19s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE, true)	5m 29s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE, true)	6m 35s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 31s
	1h 27m 10s

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