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"@key printer" should be added to tests that expect a printer
These keywords are defined in the jtreg TEST.ROOT file here https://github.com/openjdk/jdk/blob/f6be7fdf22eede767a0ac29b4f1cb770cfdc0b0f/test/jdk/TEST.ROOT#L14
There you can see the full list and some addtional explanation.
These can then be used when filtering which tests to run. For example
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