diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index beb1fa9da..7d9514684 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -63,7 +63,7 @@ jobs:
            sudo apt install gcc-11 g++-11
       shell: bash
     - name: cmake
-      run: cmake -S . -B build -DJSONCONS_SANITIZE=ON -DJSONCONS_VALGRIND=ON -DCMAKE_BUILD_TYPE=Debug -DJSONCONS_BUILD_TESTS=On
+      run: cmake -S . -B build -DJSONCONS_VALGRIND=ON -DCMAKE_BUILD_TYPE=Debug -DJSONCONS_BUILD_TESTS=On
       env:
         CC:   gcc-11
         CXX:  g++-11