Feed jacoco coverage report to SonarQube using TeamCity but it shows 0% coverage

I have a gradle project with some codes in src/main/java and some unit tests in src/test/java

Below is snippet from build.gradle

apply plugin: "jacoco"

sourceSets {
    main {
        java { srcDir 'src/main/java' }
    }
}

test {
    jacoco {
        append = false
        destinationFile = file("$buildDir/jacoco/jacocoTest.exec")
        classDumpDir = file("$buildDir/jacoco/classpathdumps")
    }
}

jacoco {
    toolVersion = "0.7.8"
}

jacocoTestReport {
    reports {
        xml.enabled false
        csv.enabled false
        html.destination "${buildDir}/reports/jacoco/jacocoHtml"
    }
}

On TeamCity, I have 2 steps, first is Gradle step with command gradle clean jacocoTestReport build and second step is SonarQube runner with the following parameters:

-Dsonar.sources=%system.teamcity.build.checkoutDir%/src
-Dsonar.java.binaries=%system.teamcity.build.checkoutDir%/build/classes
-Dsonar.branch.name=%teamcity.build.branch%
-Dsonar.jacoco.reportPaths=%system.teamcity.build.checkoutDir%/build/jacoco/jacocoTest.exec

However, on SonarQube dashboard, my project still shows to have 0% Coverage. Please advise me if I feed jacoco coverage report correctly to SonarQube (Version 6.7)