diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 63a2b3d997a17f583e332d2b1edccb033af23d5b..12ba01777409f49bb84afea831d368d0bb59dd0f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -89,7 +89,7 @@ stages:
   - cd build
   - cmake -DCMAKE_BUILD_TYPE=release -DBUILD_DEMOS=ON -DBUILD_TESTS=ON ..
   - make -j$(nproc)
-  - ctest -j$(nproc)
+  - ctest -j$(nproc) --output-on-failure
   # run demos
   - ../bin/hello_wolf
   - ../bin/hello_wolf_autoconf