diff --git a/.github/workflows/test-cpp-api.yml b/.github/workflows/test-cpp-api.yml
index 0fe2c61..199d9f4 100644
--- a/.github/workflows/test-cpp-api.yml
+++ b/.github/workflows/test-cpp-api.yml
@@ -85,7 +85,7 @@ jobs:
       # ctest -C ${{env.BUILD_TYPE}} -VV --rerun-failed --output-on-failure
       working-directory: ${{github.workspace}}/build
       run: |
-        ./copasijs_test -s
+        ./copasijs_test -s "~[slow]"