diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a15c74a6..5ace4c50 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -31,6 +31,7 @@ env:
 jobs:
   test:
     strategy:
+      # https://blog.jaraco.com/efficient-use-of-ci-resources/
       matrix:
         python:
         - "3.8"
@@ -49,7 +50,7 @@ jobs:
         - python: pypy3.10
           platform: ubuntu-latest
     runs-on: ${{ matrix.platform }}
-    continue-on-error: ${{ matrix.python == '3.13' }}
+    continue-on-error: ${{ matrix.python == '3.13' || (matrix.python == '3.8' || matrix.python == '3.9') && matrix.platform == 'macos-latest' }}
     steps:
       - uses: actions/checkout@v4
       - name: Setup Python
diff --git a/pyproject.toml b/pyproject.toml
index 199bd6c4..4a721a3b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,8 @@ classifiers = [
 ]
 keywords = ["CSS", "Cascading Style Sheets", "CSSParser", "DOM Level 2 Stylesheets", "DOM Level 2 CSS"]
 requires-python = ">=3.8"
-dependencies = []
+dependencies = [
+]
 dynamic = ["version"]
 
 [project.urls]
@@ -33,7 +34,7 @@ Homepage = "https://github.com/jaraco/cssutils"
 [project.optional-dependencies]
 testing = [
 	# upstream
-	"pytest >= 6",
+	"pytest >= 6, != 8.1.*",
 	"pytest-checkdocs >= 2.4",
 	"pytest-cov",
 	"pytest-mypy",
diff --git a/pytest.ini b/pytest.ini
index 022a723e..9a0f3bce 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,6 +1,9 @@
 [pytest]
 norecursedirs=dist build .tox .eggs
-addopts=--doctest-modules
+addopts=
+	--doctest-modules
+	--import-mode importlib
+consider_namespace_packages=true
 filterwarnings=
 	## upstream