MAINT: fixes for tox >=4 compatibility
@@ -7,13 +7,12 @@ envlist =
requires =
setuptools >= 30.3.0
pip >= 19.3.1
- tox-pypi-filter >= 0.12
isolated_build = true
[testenv]
# Pass through the following environment variables which are needed for the CI
-passenv = HOME WINDIR CI
+passenv = HOME,WINDIR,CI
# Run the tests in a temporary directory to make sure that we don't import
# astropy from the source tree
