diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index cc23da7..2814e4e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -40,7 +40,7 @@ jobs:
           shell: bash
           env:
             YAML_CPP_BUILD_TESTS: 'on'
-          run: cd build && ctest --output-on-failure
+          run: cd build && ctest --output-on-failure -DYAML_CPP_BUILD_TESTS=${{ env.YAML_CPP_BUILD_TESTS }}
 
   bazel-build:
       strategy: