diff --git a/tests/test_utils_logcfg.py b/tests/test_utils_logcfg.py
index 840317c54..c9d4df93a 100644
--- a/tests/test_utils_logcfg.py
+++ b/tests/test_utils_logcfg.py
@@ -67,7 +67,8 @@ def test_import_logging_once_per_module():
     assert result.returncode == 0, f"Script failed:\n{result.stderr}"
 
     stderr = result.stderr
+    lines = stderr.splitlines()
 
     for mod in ["json", "math", "io", "random"]:
-        count = sum(1 for line in stderr if f"importing: {mod}" in line)
+        count = sum(1 for line in lines if f"importing: {mod}" in line)
         assert count == 1, f"Expected 1 import log for '{mod}', found {count}"