diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 47b644b..e505788 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,6 +27,9 @@ jobs:
       - name: Configure Acorn
         run: cmake -B build -DBUILD_TESTING=ON -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DCMAKE_CXX_COMPILER=g++
 
+      - name: Generate the Header Only Library
+        run: ./script/headeronly.sh > bin/acorn.h
+
       - name: Build Acorn
         run: |
           export CPLUS_INCLUDE_PATH="$PWD/libint/install/include:$CPLUS_INCLUDE_PATH"