add short sleep

test/test_modules/test_pre_processing.py

 import logging
 import pytest
+import time
 
 from src.helpers import PyTestRegex
 from src.modules.experiment_setup import ExperimentSetup
@@ -13,7 +14,8 @@ class TestPreProcessing:
 
     @pytest.fixture
     def obj_no_init(self):
-        return object.__new__(PreProcessing)
+        yield object.__new__(PreProcessing)
+        RunEnvironment().__del__()
 
     @pytest.fixture
     def obj_super_init(self):
@@ -41,6 +43,7 @@ class TestPreProcessing:
                         var_all_dict={'o3': 'dma8eu', 'temp': 'maximum'})
         caplog.set_level(logging.INFO)
         PreProcessing()
+        time.sleep(0.001)  # 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 '