./gradlew runApiTest doesn't run API tests

[nonkor]

For example, calling ./gradlew runApiTestKcsbase returns output:

:kcsbase:test UP-TO-DATE
:kcsbase:check UP-TO-DATE

BUILD SUCCESSFUL

Actually, API tests were modified and it should trigger the build.
./gradlew checkApiBehaviourKcsbase works as expected - tests are started when it's called.