Update tests/test_utils_logcfg.py

tests/test_utils_logcfg.py

@@ -51,16 +51,30 @@ def test_custom_log_outputs(levelname, logfunc, message, capsys):
 
 
 # Test subprocess: top-level import logs only once
+def reset_imports():
+    """Reset sys.modules to a minimal safe state."""
+    keep = {"sys", "builtins", "importlib", "types", "warnings"}
+    for m in list(sys.modules.keys()):
+        if m not in keep:
+            sys.modules.pop(m, None)
 
 def test_import_logging_once_per_module(monkeypatch):
     captured = []
-
-    # Replace the trace method with a capturing lambda
     monkeypatch.setattr(module.log, "trace", lambda msg: captured.append(msg))
 
-    # Force re-import so the hook is triggered
+    # Reset all imports except core ones
+    reset_imports()
+
+    # Now import fresh modules
+    import importlib
     for m in ("math", "io", "random"):
-        sys.modules.pop(m, None)
+        importlib.import_module(m)
+
+    # Verify logs
+    for mod in ("math", "io", "random"):
+        matches = [msg for msg in captured if f"importing: {mod}" in msg]
+        assert len(matches) == 1, f"Expected 1 log for {mod}, got {len(matches)}; captured={captured}"
+
         importlib.import_module(m)
 
     for mod in ["math", "io", "random"]: