diff --git a/harness/tests/test_ollama_ensure.py b/harness/tests/test_ollama_ensure.py
index e29f310e..efa5d3af 100644
--- a/harness/tests/test_ollama_ensure.py
+++ b/harness/tests/test_ollama_ensure.py
@@ -1,8 +1,12 @@
 """Tests for the ensure_ollama orchestration (Ollama mocked via injected ops)."""
+import json as _json
 from types import SimpleNamespace
 
+from typer.testing import CliRunner
+
 from tht.config import EmbeddingsConfig
-from tht.cli.ollama_cmd import ensure_ollama
+from tht.cli import ollama_cmd
+from tht.cli.ollama_cmd import ensure_ollama, ollama_app
 
 
 def _cfg(**kw):
@@ -140,14 +144,6 @@ def test_initial_probe_exception_is_server_error():
     assert r["ok"] is False and r["stage"] == "server"
 
 
-import json as _json
-
-from typer.testing import CliRunner
-
-from tht.cli.ollama_cmd import ollama_app
-from tht.cli import ollama_cmd
-
-
 def _patch(monkeypatch, result):
     monkeypatch.setattr(ollama_cmd, "_load_config_or_exit", lambda _c: SimpleNamespace(embeddings=object()))
     monkeypatch.setattr(ollama_cmd, "ensure_ollama", lambda cfg, **kw: result)
@@ -179,3 +175,12 @@ def test_cli_registered_on_root_app():
     res = runner.invoke(app, ["ollama", "--help"])
     assert res.exit_code == 0
     assert "ensure" in res.output
+
+
+def test_cli_root_app_ensure_end_to_end(monkeypatch):
+    from tht.cli import app  # root tht app
+
+    _patch(monkeypatch, {"ok": True, "server": "up", "model": "warmed", "model_name": "m"})
+    res = CliRunner().invoke(app, ["ollama", "ensure", "--json"])
+    assert res.exit_code == 0, res.output
+    assert _json.loads(res.output) == {"ok": True, "server": "up", "model": "warmed", "model_name": "m"}