diff --git a/tests/test_utils_logcfg.py b/tests/test_utils_logcfg.py
index 3f881ec8..db86c782 100644
--- a/tests/test_utils_logcfg.py
+++ b/tests/test_utils_logcfg.py
@@ -51,6 +51,9 @@ def test_custom_log_outputs(levelname, logfunc, message, capsys):
 
 def test_import_logging_once_per_module():
     code = textwrap.dedent("""
+        import sys
+        for m in ("math", "io", "random"):
+            sys.modules.pop(m, None)
         from slic.utils.logcfg import *
         import math
         import io