FTBFS: devscripts failed to build on Zesty

make[2]: Leaving directory '/<<PKGBUILDDIR>>/test'
make -C scripts/ test
make[2]: Entering directory '/<<PKGBUILDDIR>>/scripts'
py3versions: no X-Python3-Version in control file, using supported versions
python3 -m flake8 --max-line-length=99 sadt suspicious-source wrap-and-sort
sadt:474:1: E305 expected 2 blank lines after class or function definition, found 1
suspicious-source:153:1: E305 expected 2 blank lines after class or function definition, found 1
wrap-and-sort:264:1: E305 expected 2 blank lines after class or function definition, found 1
Makefile:91: recipe for target 'test' failed
make[2]: *** [test] Error 1
make[2]: Leaving directory '/<<PKGBUILDDIR>>/scripts'
Makefile:58: recipe for target 'test_scripts' failed
make[1]: *** [test_scripts] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
dh_auto_test: make -j1 test returned exit code 2
debian/rules:6: recipe for target 'build' failed
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2

Here's the build failure for amd64 (it failed for all arches but just include amd64):

https://launchpad.net/ubuntu/+archive/test-rebuild-20170322.1/+build/12169299