diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8d450057cc75982247ec3778952bceaed2db7cfa..a5cb15e1954b82a6e5925ab2eed2e4a80f489f3e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -45,5 +45,6 @@ run_hba_full:
     - cwltool --no-container --preserve-environment LD_LIBRARY_PATH --preserve-environment PATH --preserve-environment PYTHONPATH workflows/HBA_calibrator.cwl test_jobs/HBA_calibrator.json
     - test_jobs/check_workflow_results.py results /builds/eosc/prefactor3-cwl/data/results_calibrator
     - rm -rf results
+    - rm -rf /tmp/*
     - cwltool --no-container --preserve-environment LD_LIBRARY_PATH --preserve-environment PATH --preserve-environment PYTHONPATH workflows/HBA_target.cwl test_jobs/HBA_target.json
     - test_jobs/check_workflow_results.py results /builds/eosc/prefactor3-cwl/data/results_target