Fix broken trace tests (#48458)

tests/helpers/test_condition.py

@@ -31,6 +31,12 @@ def assert_element(trace_element, expected_element, path):
         assert trace_element._error is None
 
 
+@pytest.fixture(autouse=True)
+def prepare_condition_trace():
+    """Clear previous trace."""
+    trace.trace_clear()
+
+
 def assert_condition_trace(expected):
     """Assert a trace condition sequence is as expected."""
     condition_trace = trace.trace_get(clear=False)