diff --git a/.github/workflows/ctest.yml b/.github/workflows/ctest.yml
index ee4cbde8..3ee927e0 100644
--- a/.github/workflows/ctest.yml
+++ b/.github/workflows/ctest.yml
@@ -113,7 +113,7 @@ jobs:
 
     - name: Build bit7z
       # Build your program with the given configuration. Note that --config is needed because the default Windows generator is a multi-config generator (Visual Studio generator).
-      run: cmake --build ${{ steps.strings.outputs.build-output-dir }} --config ${{ matrix.build_type }}
+      run: cmake --build ${{ steps.strings.outputs.build-output-dir }} --config ${{ matrix.build_type }} --parallel
       
     - name: Build 7z.so for tests (Ubuntu)
       shell: bash