another modification to solve failing

test/test_modules/test_pre_processing.py

@@ -42,11 +42,11 @@ class TestPreProcessing:
         ExperimentSetup(parser_args={}, stations=['DEBW107', 'DEBY081', 'DEBW013', 'DEBW076', 'DEBW087'],
                         var_all_dict={'o3': 'dma8eu', 'temp': 'maximum'})
         caplog.set_level(logging.INFO)
-        PreProcessing()
+        with PreProcessing():
             time.sleep(0.1)  # sometimes the destruction logging is delayed during CI testing, so wait a little
             assert caplog.record_tuples[0] == ('root', 20, 'PreProcessing started')
             assert caplog.record_tuples[1] == ('root', 20, 'check valid stations started')
-        assert caplog.record_tuples[-2] == ('root', 20, PyTestRegex(r'run for \d+\.\d+s to check 5 station\(s\). Found '
+            assert caplog.record_tuples[-1] == ('root', 20, PyTestRegex(r'run for \d+\.\d+s to check 5 station\(s\). Found '
                                                                         r'5/5 valid stations.'))
         RunEnvironment().__del__()