diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index 04eab29..6f48f7d 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -9,17 +9,14 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        # Generated with scripts/github_actions_get_python_versions.py
         python-version: [
-            # NOTE: We do not check 3.8.0 because Flake8 does not run on it.
-            "3.8.1",
+            #$ uv python list --all-versions | awk '{print $1}' | sed -E 's/cpython-(3\.[0-9]+\.[0-9]+)-.*/"\1",/' | grep -v py | sort --version-sort | uniq
             "3.8.2",
             "3.8.3",
-            "3.8.4",
             "3.8.5",
             "3.8.6",
             "3.8.7",
@@ -34,6 +31,8 @@ jobs:
             "3.8.16",
             "3.8.17",
             "3.8.18",
+            "3.8.19",
+            "3.8.20",
             "3.9.0",
             "3.9.1",
             "3.9.2",
@@ -42,8 +41,6 @@ jobs:
             "3.9.5",
             "3.9.6",
             "3.9.7",
-            "3.9.8",
-            "3.9.9",
             "3.9.10",
             "3.9.11",
             "3.9.12",
@@ -53,8 +50,13 @@ jobs:
             "3.9.16",
             "3.9.17",
             "3.9.18",
+            "3.9.19",
+            "3.9.20",
+            "3.9.21",
+            "3.9.22",
+            "3.9.23",
+            "3.9.24",
             "3.10.0",
-            "3.10.1",
             "3.10.2",
             "3.10.3",
             "3.10.4",
@@ -63,35 +65,71 @@ jobs:
             "3.10.7",
             "3.10.8",
             "3.10.9",
-            "3.10.10",
             "3.10.11",
             "3.10.12",
             "3.10.13",
-            "3.11.0",
+            "3.10.14",
+            "3.10.15",
+            "3.10.16",
+            "3.10.17",
+            "3.10.18",
+            "3.10.19",
             "3.11.1",
-            "3.11.2",
             "3.11.3",
             "3.11.4",
             "3.11.5",
             "3.11.6",
             "3.11.7",
             "3.11.8",
+            "3.11.9",
+            "3.11.10",
+            "3.11.11",
+            "3.11.12",
+            "3.11.13",
+            "3.11.14",
             "3.12.0",
             "3.12.1",
             "3.12.2",
-            "3.x",
-            "pypy-3.8", # "pypy-3.9", "pypy-3.10"
+            "3.12.3",
+            "3.12.4",
+            "3.12.5",
+            "3.12.6",
+            "3.12.7",
+            "3.12.8",
+            "3.12.9",
+            "3.12.10",
+            "3.12.11",
+            "3.12.12",
+            "3.13.0",
+            "3.13.1",
+            "3.13.2",
+            "3.13.3",
+            "3.13.4",
+            "3.13.5",
+            "3.13.6",
+            "3.13.7",
+            "3.13.8",
+            "3.13.9",
+
+            # manual additions
+            "pypy-3.8",
+
+            # NOTE(@niklas): Mypy fails with a syntax error on `# type: ignore` on the first line for `utils_test.py`
+            #   only on these PyPy versions.. huh?
+            # "pypy-3.9",
+            # "pypy-3.10",
+            # "pypy-3.11",
           ]
     steps:
       - uses: actions/checkout@v4
-      - uses: NiklasRosenstein/slap@gha/install/v1
+
       - name: Install uv
-        uses: astral-sh/setup-uv@v5
+        uses: astral-sh/setup-uv@v6
         with:
-          version: "0.5.25"
-      - uses: actions/setup-python@v5
-        with: { python-version: "${{ matrix.python-version }}" }
-      - run: slap test
+          version: "0.9.5"
+          python-version: "${{ matrix.python-version }}"
+
+      - run: uvx --python 3.13 --from slap-cli slap test
 
   publish:
     runs-on: ubuntu-latest
@@ -104,14 +142,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Set up Python 3.13
-        uses: actions/setup-python@v5
+      - name: Install uv
+        uses: astral-sh/setup-uv@v6
         with:
+          version: "0.9.5"
           python-version: "3.13"
 
-      - name: Install uv
-        run: python -m pip install uv
-
       - name: Build dist
         run: uv build