How can I access command-line test filters from build.gradle.kts?

When I run:

./gradlew :mysubproject:test --tests MyTest

in my build.gradle.kts I’ve got:

tasks.test {
    filter {
        excludeTestsMatching("mysubproject.excludeme.*")
    }

    println(this.filter.excludePatterns)
    println(this.filter.includePatterns)
}

The filter.excludePatterns shows the exclude pattern I set with the excludeTestsMatching, but filter.includePatterns does not include MyTest (the include pattern I supplied as a command-line argument). How can I access that include pattern inside my build.gradle.kts?