diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b4a587e2..efad2bcb 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,16 +9,17 @@ on:
 jobs:
   tests:
     name: ${{ matrix.name }}
-    runs-on: ${{ matrix.os }}-latest
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
         include:
-          - {name: Python 3.8, python: '3.8', os: ubuntu}
-          - {name: Python 3.9, python: '3.9', os: ubuntu}
-          - {name: Python 3.10, python: '3.10', os: ubuntu}
-          - {name: Python 3.11, python: '3.11', os: ubuntu}
-          - {name: Python 3.12, python: '3.12', os: ubuntu}
+          - {name: Python 3.8, python: '3.8'}
+          - {name: Python 3.9, python: '3.9'}
+          - {name: Python 3.10, python: '3.10'}
+          - {name: Python 3.11, python: '3.11'}
+          - {name: Python 3.12, python: '3.12'}
+          - {name: Python 3.13, python: '3.13-dev'}
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python }}
@@ -26,7 +27,7 @@ jobs:
         with:
           python-version: ${{ matrix.python }}
       - name: Install libxml2
-        if: startsWith(matrix.python, 'pypy') || startsWith(matrix.python, '3.13')
+        if: startsWith(matrix.python, '3.13')
         run: |
           sudo apt-get install libxml2-dev libxslt-dev
       - name: Install dependencies
diff --git a/pyproject.toml b/pyproject.toml
index 3930cc28..4c0a5a7e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,6 +22,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Topic :: Software Development :: Code Generators",
diff --git a/tests/codegen/handlers/test_update_attributes_effective_choice.py b/tests/codegen/handlers/test_update_attributes_effective_choice.py
index c948025d..8dcd106b 100644
--- a/tests/codegen/handlers/test_update_attributes_effective_choice.py
+++ b/tests/codegen/handlers/test_update_attributes_effective_choice.py
@@ -81,6 +81,7 @@ def test_process_symmetrical_sequence(self):
                 AttrFactory.element(
                     name="b", namespace="b", restrictions=restrictions.clone()
                 ),
+                AttrFactory.element(name="b", namespace="b"),  # no paths, impossible!
                 AttrFactory.element(name="c", namespace="b"),
                 AttrFactory.element(
                     name="d", namespace="b", restrictions=Restrictions(choice=1)