run just test harness

Author: valeriupredoi

.github/workflows/test_s3_minio.yml

@@ -68,7 +68,8 @@ jobs:
         # run tests on one process to catch eventual SegFaults
         # no SegFaults happen with n procs > 1
         run: |
-          pytest
+          # pytest
+          pytest tests/test_harness.py
       - name: Run S3 exploratory tests
         run: |
           pytest tests/s3_exploratory/test_s3_reduction.py --html=test-reports/s3-exploratory-report.html