fix(ci): pin + cache

.github/workflows/test.yml

@@ -28,10 +28,13 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.sha }}
 
-      - name: Install Virtual Box
+      - name: Install Virtual Box from Oracle
         run: |
           echo "::group::Virtual Box"
-          sudo apt update && sudo apt install -y virtualbox
+          wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add -
+          echo "deb [arch=amd64] http://download.virtualbox.org/virtualbox/debian $(lsb_release -cs) contrib" | sudo tee -a /etc/apt/sources.list.d/virtualbox.list
+          sudo apt update && sudo apt install -y virtualbox-6.1
+          vboxmanage --version
           echo "::endgroup::"
 
       - name: Install Vagrant
@@ -40,6 +43,7 @@ jobs:
           wget -O- https://apt.releases.hashicorp.com/gpg | gpg --dearmor | sudo tee /usr/share/keyrings/hashicorp-archive-keyring.gpg
           echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/hashicorp.list
           sudo apt update && sudo apt install -y vagrant
+          vagrant version
           echo "::endgroup::"
 
       - name: Configure VirtualBox