RESTEasy contains many hard-coded timeouts in tests: https://github.com/resteasy/Resteasy/commit/a814c3a1994b3dccb81e548dd01d4... WildFly Core contains TimeoutUtil class: https://github.com/wildfly/wildfly-core/blob/master/testsuite/shared/src/... RESTEasy should contain TimeoutUtil class too. With this class, timeouts could be defined like this: private static final int REST_TIMEOUT = TimeoutUtil.adjust(1000); Default value of REST_TIMEOUT is 1000. On slower machines, tests could be run with -Dts.timeout.factor=200. Unit of this property is %. So in this case, value of REST_TIMEOUT is 2000. Marek