diff --git a/.github/workflows/phono3py-pytest-conda-nolapacke.yml b/.github/workflows/phono3py-pytest-conda-nolapacke.yml
index 52d42829..a114f4e4 100644
--- a/.github/workflows/phono3py-pytest-conda-nolapacke.yml
+++ b/.github/workflows/phono3py-pytest-conda-nolapacke.yml
@@ -25,6 +25,13 @@ jobs:
         conda activate test
         conda install --yes python=${{ matrix.python-version }}
         conda install --yes matplotlib-base pyyaml h5py scipy pytest spglib cmake c-compiler cxx-compiler
+    - name: Install symfc develop branch
+      run: |
+        conda activate test
+        git clone --depth 1 https://github.com/symfc/symfc.git
+        cd symfc
+        pip install -e . -vvv
+        cd ..
     - name: Install phonopy develop branch
       run: |
         conda activate test