diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e3f26b5571..1f55c16409 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,7 +24,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v7.0.1
         with:
-          fetch-depth: 0
+          # CMake only needs `git log -1` for the commit info; a shallow
+          # fetch is enough and saves ~10 min on cache-cold runners.
+          fetch-depth: 1
           # We will handle submodules manually after fixing ownership
           submodules: 'false'
 
@@ -47,6 +49,14 @@ jobs:
             xz-utils
           sudo pip install clang-format clang-tidy
 
+      - name: Setup ccache
+        run: |
+          # Default cache size (~10G) is too small for a full -O3 -g build
+          # plus daily develop churn; raise it and reset per-run counters.
+          ccache --max-size=30G
+          ccache --zero-stats
+          ccache -s
+
       - name: Install external tools from toolchain
         run: |
           cd toolchain
@@ -308,3 +318,7 @@ jobs:
           OMP_NUM_THREADS: '2'
         run: |
           ctest --test-dir build -V --timeout 1700 -E 'integrate_test|01_PW|02_NAO_Gamma|03_NAO_multik|04_FF|05_rtTDDFT|06_SDFT|07_OFDFT|08_EXX|09_DeePKS|10_others|11_PW_GPU|12_NAO_Gamma_GPU|13_NAO_multik_GPU|15_rtTDDFT_GPU|16_SDFT_GPU|17_DS_DFTU|MODULE_BASE|MODULE_IO|MODULE_HSOLVER|MODULE_CELL|MODULE_MD|MODULE_PSI|MODULE_ESTATE|MODULE_RI|MODULE_HAMILT|MODULE_PW|MODULE_LCAO|MODULE_AO|MODULE_NAO|MODULE_RELAX|MODULE_LR'
+
+      - name: ccache statistics
+        if: always()
+        run: ccache -s