Error during pjproject with python3 building.

[CpServiceSpb]

There is pjproject 2.12 which I try to build. I used to python3-pjsip cloned from here. But the following error is appeared: running install_egg_info

Writing pjproject-2.12.1/debian/tmp/usr/lib/python3/dist-packages/pjsua-2.12.1.egg-info
W: pybuild base:249: missing command (plugin=distutils, method=test, interpreter=python3, version=3)

How do correct it ?