Class org.jboss.test.jbossmx.compliance.timer.JBossTimerPeriodTestCase uses wrong computation of maxDeviation value, which makes the test incorrect.

org.jboss.test.jbossmx.compliance.timer.PeriodTestCase, line 195:

long maxDeviation = expected / percentage;

should be corrected to:

long maxDeviation = expected * percentage / 100;