diff --git a/.azure-pipelines/xfel/unix-conda-build.yml b/.azure-pipelines/xfel/unix-conda-build.yml
index 36285b6846..9b975e4745 100644
--- a/.azure-pipelines/xfel/unix-conda-build.yml
+++ b/.azure-pipelines/xfel/unix-conda-build.yml
@@ -111,6 +111,9 @@ steps:
     chmod +x $(Pipeline.Workspace)/modules/xfel_regression/merging_test_data/merge_thermo.csh
     export OMP_NUM_THREADS=4
     libtbx.run_tests_parallel module=uc_metrics module=simtbx module=xfel_regression module=LS49 nproc=4
+    echo "DEBUG"
+    cat mp4k/rank_0*.err
+    echo "DEBUG2"
   failOnStderr: false
   displayName: Test