diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index da78a72..9d16d74 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,7 +38,7 @@ jobs:
     - uses: astral-sh/setup-uv@v7
 
     - name: Test package
-      run: uv run --with "clang<19" --extra test pytest --forked
+      run: uv run --with "clang<19" --group test pytest --forked
       
 # Commented for now -- msys2 Clang (v15) and the clang Python package (v14) are incompatible
 #
@@ -60,7 +60,7 @@ jobs:
 #        python-version: ${{ matrix.python-version }}
 #
 #    - name: Install package
-#      run: python -m pip install .[test]
+#      run: python -m pip install -e. --group test
 #
 #    - name: Install clang
 #      run: C:\msys64\usr\bin\pacman.exe -S clang64/mingw-w64-clang-x86_64-clang --noconfirm
diff --git a/pyproject.toml b/pyproject.toml
index 513178b..06f89af 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,12 +27,13 @@ classifiers = [
 ]
 dynamic = ["version"]
 
-[project.optional-dependencies]
+[dependency-groups]
 test = [
     "pytest",
     "pybind11",
     "pytest-forked",
 ]
+dev = [{ include-group = "test" }]
 
 [project.scripts]
 pybind11-mkdoc = "pybind11_mkdoc:main"