diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 44555e4..37564d3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,13 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-python@v1
-      with:
-        python-version: "3.7"
-    - name: Install dependencies
+    - name: Install tidy 5.8.0
       run: |
-        sudo apt-get update -qq
-        sudo apt-get install -yy default-jre-headless
-        pip install html5validator
+        curl -sSL -o /tmp/tidy.zip https://github.com/remram44/regex-cheatsheet/files/6848619/tidy-5.8.0.zip
+        unzip -p /tmp/tidy.zip tidy-5.8.0 >/usr/local/bin/tidy
+        chmod +x /usr/local/bin/tidy
     - name: Validate HTML
-      run: html5validator --show-warnings
+      run: tidy -errors -quiet --drop-empty-elements no regex.html