diff --git a/.github/workflows/liquid.yml b/.github/workflows/liquid.yml
index 4fcc6200..ccc3c0d1 100644
--- a/.github/workflows/liquid.yml
+++ b/.github/workflows/liquid.yml
@@ -27,3 +27,19 @@ jobs:
         env:
           LIQUID_C_PEDANTIC: 'true'
       - run: bundle exec rubocop
+
+  valgrind:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.0'
+      - run: sudo apt-get install -y valgrind
+      - uses: actions/cache@v1
+        with:
+          path: vendor/bundle
+          key: ${{ runner.os }}-gems-${{ hashFiles('Gemfile') }}
+          restore-keys: ${{ runner.os }}-gems-
+      - run: bundle install --jobs=3 --retry=3 --path=vendor/bundle
+      - run: bundle exec rake test:valgrind