diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 057b96e4..fe7c2135 100755
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,8 +45,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install valgrind
+        run: sudo apt-get install --no-install-recommends valgrind
+
       - name: Check
         run: |
-          cd tests && make main.o && ./main.o
+          cd tests && make 01c.o && valgrind --leak-check=full ./01c.o
+          # cd tests && make main.o && ./main.o