Fixing issues in my PR.

.travis.yml

@@ -16,12 +16,19 @@ env:
     - ASTTOKENS_SLOW_TESTS=1
     - COVERALLS_PARALLEL=true
 
+before_install:
+  - pip install --upgrade setuptools>=44 wheel setuptools_scm[toml]>=3.4.3 pep517
+  - pip install --upgrade coveralls
+
 install:
-  - pip install coveralls
-  - pip install .[test]
+  #- python3 -m pep517.build . # replace the following command with this one when you drop python 2
+  - python ./setup.py bdist_wheel
+  - export WHLNAME=./dist/asttokens-0.CI-py2.py3-none-any.whl
+  - mv ./dist/*.whl $WHLNAME
+  - pip install --upgrade --pre "$WHLNAME[test]"
 
 script:
-  - travis_wait 30 coverage run --include='asttokens/*' -m pytest
+  - travis_wait 30 coverage run --branch --include='asttokens/*' -m pytest --junitxml=./rspec.xml
   - coverage report -m
 
 after_success:

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=41", "wheel", "setuptools_scm[toml]>=3.4.3"]
+requires = ["setuptools>=44", "wheel", "setuptools_scm[toml]>=3.4.3"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]

setup.cfg

@@ -31,6 +31,7 @@ classifiers =
 [options]
 packages = asttokens
 install_requires = six
+setup_requires = setuptools>=44; wheel; setuptools_scm[toml]>=3.4.3
 
 [options.extras_require]
 test = astroid; pytest