PR feedback

tox.ini

@@ -12,13 +12,10 @@ skip_missing_interpreters = true
 
 [testenv]
 description = run the tests with pytest under {basepython}
-setenv = VIRTUALENV_DOWNLOAD = 0
-         PIP_DISABLE_VERSION_CHECK = 1
+setenv = PIP_DISABLE_VERSION_CHECK = 1
          COVERAGE_FILE = {toxworkdir}/.coverage.{envname}
 passenv = http_proxy https_proxy no_proxy SSL_CERT_FILE TOXENV CI TRAVIS TRAVIS_* APPVEYOR APPVEYOR_* CODECOV_*
-deps = setuptools >= 29.0.0
-       setuptools_scm >= 2.0.0, < 3
-       wheel >= 0.31.0
+deps = 
 extras = testing
 changedir = {toxinidir}/tests
 commands = pytest {posargs:--cov="{envsitepackagesdir}/tox" --cov-config="{toxinidir}/tox.ini"  --timeout=180 .}
@@ -33,13 +30,14 @@ commands = sphinx-build -d "{toxworkdir}/docs_doctree" doc "{toxworkdir}/docs_ou
 
 
 [testenv:fix-lint]
-description = run static analysis and style check using flake8
+description = format the code base to adhere to our styles, and complain about what we cannot do automatically
 basepython = python3.6
 passenv = {[testenv]passenv}
           HOMEPATH
           # without PROGRAMDATA cloning using git for Windows will fail with an
           # `error setting certificate verify locations` error
           PROGRAMDATA
+          DIFF_AGAINST
 extras = lint
 changedir = {toxinidir}
 commands = pre-commit run --all-files --show-diff-on-failure
@@ -106,7 +104,7 @@ max-line-length = 99
 ignore = E203, W503
 
 [coverage:run]
-branch = false
+branch = true
 
 [coverage:report]
 skip_covered = True