diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e62d059..a1a0e7c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -11,13 +11,13 @@ on:
 jobs:
   tests:
     name: "Python ${{ matrix.python-version }}"
-    runs-on: "ubuntu-latest"
+    runs-on: "self-hosted"
     env:
-      USING_COVERAGE: '3.7,3.8,3.10'
+      USING_COVERAGE: '3.7,3.8,3.10,3.11,3.12'
 
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v3
@@ -60,7 +60,7 @@ jobs:
       # Install dependencies. `--no-root` means "install all dependencies but not the project
       # itself", which is what you want to avoid caching _your_ code. The `if` statement
       # ensures this only runs on a cache miss.
-      - run: poetry install --no-interaction --no-root
+      - run: poetry install --no-interaction --no-root --with dev
         if: steps.cache-deps.outputs.cache-hit != 'true'
 
       # Now install _your_ project. This isn't necessary for many types of projects -- particularly