diff --git a/.gitea/workflows/cpp-tests.yml b/.gitea/workflows/cpp-tests.yml
index ab9563d..5a55840 100644
--- a/.gitea/workflows/cpp-tests.yml
+++ b/.gitea/workflows/cpp-tests.yml
@@ -11,17 +11,12 @@ on:
 jobs:
   test:
     runs-on: eulernest
-    # container image intentionally omitted until ci-cpp:latest is
-    # rebuilt for linux/arm64 and pushed to git.eulernest.eu
+    container:
+      image: git.eulernest.eu/conformallab/ci-cpp:latest
 
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install build tools
-        run: |
-          sudo apt-get update -qq
-          sudo apt-get install -y --no-install-recommends cmake g++ git ca-certificates
-
       - name: Configure (tests-only mode)
         run: cmake -S code -B build -DCMAKE_BUILD_TYPE=Release