The following classes are calling TxManager.getInstance to obtain a TransactionManager instead of using TransactionManagerLocator.getInstance().locate(). This prevents alternative TransactionManagers from being used.

testsuite/src/main/org/jboss/test/jca/test/AbstractPoolingStressTest.java
testsuite/src/main/org/jboss/test/jca/test/PoolingUnitTestCase.java
testsuite/src/main/org/jboss/test/jca/test/XATxConnectionManagerUnitTestCase.java
testsuite/src/main/org/jboss/test/tm/test/AbstractTransactionLocalStressTest.java
testsuite/src/main/org/jboss/test/tm/test/TransactionLocalUnitTestCase.java
testsuite/src/main/org/jboss/test/txtimer/test/TimedMockObject.java
testsuite/src/main/org/jboss/test/txtimer/test/TransactionalTimerTestCase.java