diff --git a/tests/parametric/test_partial_flushing.py b/tests/parametric/test_partial_flushing.py
index 2f09c3fe89..0333206d1e 100644
--- a/tests/parametric/test_partial_flushing.py
+++ b/tests/parametric/test_partial_flushing.py
@@ -70,6 +70,7 @@ def do_partial_flush_test(self, test_agent, test_library):
             # verify the partially flushed chunk has proper "trace level" tags
             assert child_span["metrics"]["_sampling_priority_v1"] == 1.0
             assert len(child_span["meta"]["_dd.p.tid"]) > 0
+            assert len(child_span["meta"]["_dd.p.dm"]) > 0
 
     traces = test_agent.wait_for_num_traces(1, clear=True)
     full_trace = find_trace(traces, parent_span.trace_id)