use tox>=4

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        toxenv: [ check-style, check-security, check-dependencies, check-build ]
+        toxenv: [ check-style, check-security, check-dependencies, build-dist ]
         python-version: [ '3.11' ]
         os: [ ubuntu-latest ]
     steps:
@@ -39,7 +39,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
           cache-dependency-path: setup.cfg
-      - run: pip install "tox<4.0"
+      - run: pip install "tox>=4.0"
       - run: tox -e ${{ matrix.toxenv }}
   test:
     name: ${{ matrix.toxenv }} (Python ${{ matrix.python-version }}, ${{ matrix.os }})
@@ -75,7 +75,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
           cache-dependency-path: setup.cfg
-      - run: pip install "tox<4.0"
+      - run: pip install "tox>=4.0"
       - run: >
           echo "pmap=$(
           curl -s -X POST -d '{"jsonrpc": "1.0", "method": "get_default_context", "params": ["jwst"], "id": 1}' ${{ env.CRDS_SERVER_URL }}/json/ |

tox.ini

@@ -1,9 +1,8 @@
 [tox]
 envlist =
-    check-{style,security,dependencies,build}
+    check-{style,security,dependencies}
     test{,-oldestdeps,-devdeps,-sdpdeps}{,-pyargs,-warnings,-regtests,-cov}
-    build-docs
-isolated_build = true
+    build-{docs,dist}
 
 # tox environments are constructed with so-called 'factors' (or terms)
 # separated by hyphens, e.g. test-devdeps-cov. Lines below starting with factor:
@@ -39,16 +38,6 @@ deps =
 commands =
     verify_install_requires
 
-[testenv:check-build]
-description = check build sdist/wheel and a strict twine check for metadata
-skip_install = true
-deps =
-    twine>=3.3
-    build
-commands =
-    python -m build .
-    twine check --strict dist/*
-
 [testenv]
 description =
     run tests
@@ -111,3 +100,11 @@ description = invoke sphinx-build to build the HTML docs
 extras = docs
 commands =
     sphinx-build -W docs docs/_build
+
+[testenv:build-dist]
+description = check build sdist/wheel and a strict twine check for metadata
+skip_install = true
+deps =
+    build
+commands =
+    python -m build