@@ -11,12 +11,38 @@ def station_model():
     """Return a basemodel for testing."""
 
     class Model(BaseModel):
+        wfo: fields.WFO3_FIELD = "DMX"
         station: fields.STATION_LIST_FIELD
         tz: fields.TZ_FIELD = "UTC"
 
     return Model
 
 
+@pytest.mark.parametrize(
+    "wfo_input,wfo_expected",
+    [
+        ("DMX", "DMX"),
+        ("KDMX", "DMX"),
+        ("PGUM", "GUM"),
+        ("PHFO", "HFO"),
+        ("PAFG", "AFG"),
+        ("PAJK", "AJK"),
+        ("PAFC", "AFC"),
+        ("TJSJ", "JSJ"),
+        ("TSJU", "JSJ"),
+    ],
+)
+def test_unrectify_wfo(station_model, wfo_input, wfo_expected):
+    """Test how WFO3_FIELD unrectifies four character WFOs."""
+    assert station_model(wfo=wfo_input, station="A").wfo == wfo_expected
+
+
+def test_valid_tz(station_model):
+    """Test that a valid timezone works."""
+    ans = "America/New_York"
+    assert station_model(station="A", tz=ans).tz == ans
+
+
 def test_tz_aliases(station_model):
     """Test that these are handled."""
     assert station_model(station="A", tz="").tz == "UTC"