diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 5c4a9c2..196239e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,25 +21,11 @@ jobs:
           fi
       - uses: cachix/install-nix-action@v27
 
-      - name: "Install the deploy key"
-        env:
-          DEPLOY_KEY: "${{ secrets.DEPLOY_KEY }}"
-        run: |
-          mkdir -p ~/.ssh
-          ssh_agent_vars=$(ssh-agent -s)
-          eval "$ssh_agent_vars"
-          echo "$ssh_agent_vars" | fgrep '=' | cut -d';' -f1 >> "$GITHUB_ENV"
-          echo "$DEPLOY_KEY" | ssh-add -
-
-          ssh-keyscan github.cert.corp >> ~/.ssh/known_hosts
-          cat ~/.ssh/known_hosts | sort -u > ~/.ssh/known_hosts.new
-          mv ~/.ssh/known_hosts.new ~/.ssh/known_hosts
-
       - name: "Build nix-shell derivation"
         run: nix-build shell.nix
 
   tests:
-    runs-on: [ Linux, self-hosted ]
+    runs-on: ubuntu-latest
     needs: build
     steps:      
       - uses: actions/checkout@v3
@@ -49,22 +35,7 @@ jobs:
           if [ -d "/nix/var/nix/profiles/default/bin" ]; then
             echo "/nix/var/nix/profiles/default/bin" > "$GITHUB_PATH"
           fi
-      - uses: CERT/install-nix-action@v25
-
-      - name: "Install the deploy key"
-        env:
-          DEPLOY_KEY: "${{ secrets.DEPLOY_KEY }}"
-        run: |
-          mkdir -p ~/.ssh
-          ssh_agent_vars=$(ssh-agent -s)
-          eval "$ssh_agent_vars"
-          echo "$ssh_agent_vars" | fgrep '=' | cut -d';' -f1 >> "$GITHUB_ENV"
-          echo "$DEPLOY_KEY" | ssh-add -
-
-          ssh-keyscan github.cert.corp >> ~/.ssh/known_hosts
-          cat ~/.ssh/known_hosts | sort -u > ~/.ssh/known_hosts.new
-          mv ~/.ssh/known_hosts.new ~/.ssh/known_hosts
-
+      - uses: cachix/install-nix-action@v27
       - name: "Run test suite"
         run: |
           cd tests