diff --git a/server/tests/test_routes_extra.py b/server/tests/test_routes_extra.py
index 2162099..49622c0 100644
--- a/server/tests/test_routes_extra.py
+++ b/server/tests/test_routes_extra.py
@@ -380,8 +380,18 @@ class RouteExtraTests(unittest.TestCase):
         async with api_client() as client:
             with oidc_user("alice"):
                 vault_id = await _vault(client)
+                payload = {"filename": "chain.pem", "pem": pem}
                 response = await client.post(
-                    f"/api/vaults/{vault_id}/import", json={"filename": "chain.pem", "pem": pem}
+                    f"/api/vaults/{vault_id}/import", json={**payload, "dry_run": True}
+                )
+                assert response.status_code == 200, response.text
+                preview = response.json()["items"]
+                assert len(preview) == 3
+                assert all(not item["duplicate"] for item in preview)
+
+                response = await client.post(
+                    f"/api/vaults/{vault_id}/import",
+                    json={**payload, "selected": [item["index"] for item in preview]},
                 )
                 assert response.status_code == 200, response.text
                 result = response.json()
@@ -401,6 +411,7 @@ class RouteExtraTests(unittest.TestCase):
                 assert intermediate_row["issuer_id"] == root_row["id"]
                 assert leaf_row["issuer_id"] == intermediate_row["id"]
                 assert all(cert["issuer_id"] != cert["id"] for cert in certs.values())
+                assert all(cert["key_id"] is None for cert in certs.values())
 
                 # Re-importing duplicates also repairs self-links left by older imports.
                 model = await Certificate.get(id=leaf_row["id"])