Gradle. Why execute task that I not call?

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1

Gradle 2.14

android {
    dev {
    }
}

 task runAppDev(type: Exec, dependsOn: 'installDev') {
        description "Install and run app (dev env)"
        android.applicationVariants.all { variant ->
            if ("installDev".toUpperCase().endsWith(variant.getName().toUpperCase())) {
                commandLine getRunAppCommandLine(variant)
            }
        }
    }

    def getRunAppCommandLine(variant) {
        List<String> commandLine = ["adb", "shell", "am", "start", "-n", variant.getApplicationId() + "/.activity.SplashActivity"]
       return commandLine
    }

Run my task by: gradlew runAppDev

Result:

Installing APK ‘app-dev.apk’ on ‘Nexus 5 - 6.0.1’ for app:dev Installed on 1 device. :app:runAppDev BUILD SUCCESSFUL

So, my application success installed on device, but NOT run on device.