diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0b7761b..e65bd92 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -22,4 +22,4 @@ jobs:
           PATH="$PWD/build:$PWD/scripts:$PATH"
           make -j"$(nproc)" -O -k -C tests/ --no-print-directory
       - name: Check formatting
-        run: .ci-scripts/cpp-fmt-check *.cpp *.hpp
+        run: .ci-scripts/cpp-fmt-check source/*.cpp source/*.hpp