diff --git a/.github/workflows/installer.yml b/.github/workflows/installer.yml
index db32f8a..bb1890a 100644
--- a/.github/workflows/installer.yml
+++ b/.github/workflows/installer.yml
@@ -155,18 +155,25 @@ jobs:
           echo >> /Users/runner/.bash_profile
           echo 'eval "$(/opt/homebrew/bin/brew shellenv)"' >> /Users/runner/.bash_profile
 
-      - name: Install Python
-        run: brew install python
+      - name: Install Python 3.13
+        run: |
+          brew install python@3.13
 
       - name: Install Poetry
         run: |
-          eval "$(/opt/homebrew/bin/brew shellenv)"
           python -m site
           ls -all $(which python)
           curl -sSL https://install.python-poetry.org | python -
 
+      - name: Install Python 3.12
+        run: |
+          brew install python@3.12
+          brew unlink python@3.13
+          brew link --force python@3.12
+
       - name: Test Poetry
         run: |
+          python -m site
           poetry new foo
           cd foo
           poetry add pycowsay