diff --git a/.github/workflows/github-actions.yml b/.github/workflows/github-actions.yml
index 2f707ba..15d660e 100644
--- a/.github/workflows/github-actions.yml
+++ b/.github/workflows/github-actions.yml
@@ -19,676 +19,6 @@ jobs:
             toxpython: 'python3.11'
             tox_env: 'docs'
             os: 'ubuntu-latest'
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-            os: 'windows-latest'
-          - name: 'py38-pure-cover (macos/arm64)'
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-            os: 'ubuntu-latest'
-          - name: 'py38-pure-nocov (windows/AMD64)'
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-          - name: 'py38-pure-nocov (macos/arm64)'
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-          - name: 'py38-cython-cover (ubuntu/x86_64)'
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-            os: 'macos-latest'
-          - name: 'py312-pure-nocov (ubuntu/x86_64)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-pure-nocov'
-            cibw_arch: 'x86_64'
-            cibw_build: false
-            os: 'ubuntu-latest'
-          - name: 'py312-pure-nocov (windows/AMD64)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-pure-nocov'
-            cibw_arch: 'AMD64'
-            cibw_build: false
-            os: 'windows-latest'
-          - name: 'py312-pure-nocov (macos/arm64)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-pure-nocov'
-            cibw_arch: 'arm64'
-            cibw_build: false
-            os: 'macos-latest'
-          - name: 'py312-cython-cover (ubuntu/x86_64)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-cython-cover'
-            cover: true
-            cibw_arch: 'x86_64'
-            cibw_build: false
-            os: 'ubuntu-latest'
-          - name: 'py312-cython-cover (windows/AMD64)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-cython-cover'
-            cover: true
-            cibw_arch: 'AMD64'
-            cibw_build: false
-            os: 'windows-latest'
-          - name: 'py312-cython-cover (macos/arm64)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-cython-cover'
-            cover: true
-            cibw_arch: 'arm64'
-            cibw_build: false
-            os: 'macos-latest'
-          - name: 'py312-cython-nocov (ubuntu/x86_64/manylinux)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-cython-nocov'
-            cibw_arch: 'x86_64'
-            cibw_build: 'cp312-*manylinux*'
-            os: 'ubuntu-latest'
-          - name: 'py312-cython-nocov (ubuntu/x86_64/musllinux)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-cython-nocov'
-            cibw_arch: 'x86_64'
-            cibw_build: 'cp312-*musllinux*'
-            os: 'ubuntu-latest'
-          - name: 'py312-cython-nocov (ubuntu/aarch64/manylinux)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-cython-nocov'
-            cibw_arch: 'aarch64'
-            cibw_build: 'cp312-*manylinux*'
-            os: 'ubuntu-latest'
-          - name: 'py312-cython-nocov (ubuntu/aarch64/musllinux)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-cython-nocov'
-            cibw_arch: 'aarch64'
-            cibw_build: 'cp312-*musllinux*'
-            os: 'ubuntu-latest'
-          - name: 'py312-cython-nocov (windows/AMD64)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-cython-nocov'
-            cibw_arch: 'AMD64'
-            cibw_build: 'cp312-*'
-            os: 'windows-latest'
-          - name: 'py312-cython-nocov (windows/x86)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x86'
-            tox_env: 'py312-cython-nocov'
-            cibw_arch: 'x86'
-            cibw_build: 'cp312-*'
-            os: 'windows-latest'
-          - name: 'py312-cython-nocov (macos/arm64)'
-            python: '3.12'
-            toxpython: 'python3.12'
-            python_arch: 'x64'
-            tox_env: 'py312-cython-nocov'
-            cibw_arch: 'arm64'
-            cibw_build: 'cp312-*'
-            os: 'macos-latest'
           - name: 'pypy38-pure-cover (ubuntu/x86_64)'
             python: 'pypy-3.8'
             toxpython: 'pypy3.8'
diff --git a/tox.ini b/tox.ini
index b32461e..075f681 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,7 +14,8 @@ envlist =
     clean,
     check,
     docs,
-    {py38,py39,py310,py311,py312,pypy38,pypy39,pypy310}-{pure,cython}-{cover,nocov},
+    {cpy,pypy}{38,39,310}-{pure,cython}-{cover,nocov},
+    {cpy}{311,312}-{pure,cython}-{cover,nocov},
     report
 ignore_basepython_conflict = true
 
@@ -23,11 +24,11 @@ basepython =
     pypy38: {env:TOXPYTHON:pypy3.8}
     pypy39: {env:TOXPYTHON:pypy3.9}
     pypy310: {env:TOXPYTHON:pypy3.10}
-    py38: {env:TOXPYTHON:python3.8}
-    py39: {env:TOXPYTHON:python3.9}
-    py310: {env:TOXPYTHON:python3.10}
-    py311: {env:TOXPYTHON:python3.11}
-    py312: {env:TOXPYTHON:python3.12}
+    cpy38: {env:TOXPYTHON:python3.8}
+    cpy39: {env:TOXPYTHON:python3.9}
+    cpy310: {env:TOXPYTHON:python3.10}
+    cpy311: {env:TOXPYTHON:python3.11}
+    cpy312: {env:TOXPYTHON:python3.12}
     {bootstrap,clean,check,report,docs,codecov}: {env:TOXPYTHON:python3}
 setenv =
     PYTHONPATH={toxinidir}/tests
@@ -52,7 +53,7 @@ deps =
     tzdata
     ipdb
 commands =
-    {py27,py3,py33,py34,py35,py36,py36,py37,py38,py39,py310,py311}: python tests/setup.py clean --all build_ext --force --inplace
+    cpy: python tests/setup.py clean --all build_ext --force --inplace
     cover: python setup.py clean --all build_ext --force --inplace
     nocov: {posargs:pytest -vv --ignore=src}
     cover: {posargs:pytest --cov --cov-report=term-missing -vv}