useJmx=false, two brokers, getting exception due to jmx

2 test cases use two brokers. One is configured to not use jmx:

<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://activemq.apache.org/schema/core
http://activemq.apache.org/schema/core/activemq-core.xsd">

<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>file:${config.jms}/test.properties</value>
</property>
</bean>

<broker xmlns="http://activemq.apache.org/schema/core"
brokerName="localhosttest" dataDirectory="${activemq.data}" useJmx="false">

<managementContext>
<managementContext createConnector="false" createMBeanServer="false"/>
</managementContext>

<persistenceAdapter>
<kahaDB directory="${activemq.data}/kahadb"/>
</persistenceAdapter>

<transportConnectors>

<transportConnector name="openwire"

uri="tcp://0.0.0.0:61616?maximumConnections=1000橪;wireformat.maxFrameSize=104857600"/>
</transportConnectors>
</broker>
</beans>

But still when both tests run in the same jvm, the 2nd one fails because it
tries to create the jmx:

Caused by: javax.management.InstanceAlreadyExistsException:
org.apache.activemq:BrokerName=localhost,Type=Broker
at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324)
at
com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522)
at
org.apache.activemq.broker.jmx.ManagementContext.registerMBean(ManagementContext.java:366)
at
org.apache.activemq.broker.jmx.AnnotatedMBean.registerMBean(AnnotatedMBean.java:72)
at
org.apache.activemq.broker.BrokerService.startManagementContext(BrokerService.java:2370)
at org.apache.activemq.broker.BrokerService.start(BrokerService.java:567)
at
org.apache.activemq.xbean.XBeanBrokerService.afterPropertiesSet(XBeanBrokerService.java:58)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1608)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1549)
at
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1479)
... 65 more

it goes down to BrokerService.isUseJmx() which is called by BrokerService
but it returns true while in my config is false. Any ideas?