diff --git a/tests/integration/test_parser_diversity_command.py b/tests/integration/test_parser_diversity_command.py
new file mode 100644
index 00000000..c6646424
--- /dev/null
+++ b/tests/integration/test_parser_diversity_command.py
@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+from openamp_foundry.cli.main import build_parser
+
+
+def test_diversity_command_parser_defaults_are_stable():
+    parser = build_parser()
+    args = parser.parse_args([
+        "diversity-check",
+        "--panel-csv",
+        "panel.csv",
+    ])
+
+    assert args.command == "diversity-check"
+    assert args.panel_csv == "panel.csv"
+    assert args.similarity_threshold == 0.60
+    assert args.n_per_cluster == 1
+    assert args.out == "outputs/diversity_report.md"