multiple testng test listeners running using gradle test command - gradle

Question

I have 2 custom listeners implementing ITestListener, ISuiteListener, IInvokedMethodListener . when I run the command from gradle as gradle clean --test testname . it runs both listeners though I have only one class defined in the #Listeners annotation in test. Its a gradle project but when I run the test in intellij as testng test it runs with only 1 listener as expected. Can you please tell how to make it run with only 1 listener using gradle command
my build.gradle below and testng version I am using is 6.9.4 and I tried 6.9.10 too
ext {
unitTestingMinHeapSize = "512m"
}
// Apply the java plugin to add support for Java
apply plugin: 'java'
// Apply the application plugin to add support for building an application
apply plugin: 'application'
// Apply the eclipse plugin to add support for building on eclipse
apply plugin: 'eclipse'
// Apply the idea plugin to add support for building on IDEA
apply plugin: 'idea'
// In this section you declare where to find the dependencies of your project
repositories {
// Use 'jcenter' for resolving your dependencies.
// You can declare any Maven/Ivy/file repository here.
mavenCentral()
mavenLocal()
}
// In this section you declare the dependencies for your production and test code
dependencies {
compile project(':oos')
testCompile project(':oos')
compile "commons-pool:commons-pool:$apacheCommonsPool1Version"
compile "org.apache.commons:commons-lang3:$apacheCommonsLangVersion"
compile "org.apache.commons:commons-pool2:$apacheCommonsPool2Version"
compile "com.rabbitmq:amqp-client:$rabbitMQClientVersion"
compile "redis.clients:jedis:$jedisVersion"
compile "org.apache.httpcomponents:httpclient:$httpClientVersion"
compile "org.apache.httpcomponents:httpmime:$httpmimeversion"
compile "io.rest-assured:rest-assured:$restAssuredVersion"
compile "org.hamcrest:hamcrest-all:$hamcrestVersion"
compile "org.postgresql:postgresql:$postgresqlversion"
compile "com.googlecode.json-simple:json-simple:1.1.1"
compile "com.codepine.api:testrail-api-java-client:1.0.2"
testCompile "org.mockito:mockito-all:$mockitoVersion"
testCompile "org.springframework:spring-test:$springVersion"
compile ("org.testng:testng:$testngVersion") {
exclude group: "junit", module: "junit"
}
testCompile "org.apache.commons:commons-pool2:$apacheCommonsPool2Version"
}
test {
for (String key : System.getProperties().keySet()) {
systemProperty key, System.properties["$key"]
}
jvmArgs "-XX:-UseSplitVerifier"
systemProperty "runId", findProperty("runId")
useTestNG { useDefaultListeners = true }
beforeTest { descriptor ->
logger.lifecycle("Running: " + descriptor)
}
minHeapSize = "$unitTestingMinHeapSize"
jvmArgs '-XX:+UseConcMarkSweepGC', '-XX:+CMSIncrementalMode' //,'-XX:+PrintGCDetails','-XX:+PrintGCTimeStamps'
if (System.getProperty("test.profile", "false").equals("true")) {
jvmArgs "-noverify", "-agentpath:${profilerDir}/lib/deployed/jdk16/mac/libprofilerinterface.jnilib=${profilerDir}/lib,5140,0"
}
// listen to standard out and standard error of the test JVM(s)
onOutput { descriptor, event ->
// logger.lifecycle("Test: " + descriptor + " produced standard out/err: " + event.message )
if (event.destination == TestOutputEvent.Destination.StdErr) {
logger.error(" ERROR: " + event.message.trim())
}
}
}