diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 15ec04e076bf21863a9af2570d7f724e11406512..ebd77e11d1112d31f40c7bf9583448b93ceb16b9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -110,7 +110,7 @@ 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