diff --git a/tests/test_types.py b/tests/test_types.py
index 533111e..0022981 100644
--- a/tests/test_types.py
+++ b/tests/test_types.py
@@ -1,7 +1,7 @@
 import pytest
 from pydantic import ValidationError
 
-from vatsim.types import VatsimData, VatsimEndpoints
+from vatsim.types import Atis, VatsimData, VatsimEndpoints
 
 
 def test_fails_on_wrong_data():
@@ -11,3 +11,26 @@ def test_fails_on_wrong_data():
 
 def test_validates_status_json(status_json: str):
     VatsimEndpoints.model_validate_json(status_json)
+
+
+def test_atis_validate_runways_in_use():
+    atis_data = {
+        "cid": 23,
+        "name": "Frank Nord",
+        "callsign": "ZZZZ_ATIS",
+        "frequency": "122.800",
+        "facility": 1,
+        "rating": 1,
+        "server": "unkown",
+        "visual_range": 100,
+        "atis_code": "Z",
+        "logon_time": "2032-04-20T04:20:00+0000",
+        "last_updated": "2032-04-20T04:20:00+0000",
+        "text_atis": None,
+    }
+    atis_no_text = Atis.model_validate(atis_data)
+    assert len(atis_no_text.runways_in_use) == 0
+
+    atis_data["text_atis"] = "RUNWAYS IN USE 26L AND 26R"
+    atis_with_text = Atis.model_validate(atis_data)
+    assert set(atis_with_text.runways_in_use) == {"26L", "26R"}