diff --git a/.github/workflows/testsuite.yaml b/.github/workflows/testsuite.yaml
index 9f31bf4..9153bea 100644
--- a/.github/workflows/testsuite.yaml
+++ b/.github/workflows/testsuite.yaml
@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest]
-        python-version: [3.9, "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
     steps:
       - uses: actions/checkout@master
         with:
diff --git a/pyproject.toml b/pyproject.toml
index 33a5eaf..1ea89e6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ dependencies = [
   "pyyaml",
   "astropy>=5",
   "methodtools",
-  "pyuvdata",
+  "pyuvdata>=3.0.0",
   "cached_property",
   "rich",
   "attrs",
diff --git a/src/py21cmsense/_utils.py b/src/py21cmsense/_utils.py
index d218bb6..1b4ad4b 100644
--- a/src/py21cmsense/_utils.py
+++ b/src/py21cmsense/_utils.py
@@ -85,9 +85,9 @@ def phase_past_zenith(
         lsts = np.array([lsts])
 
     if use_apparent:
-        app_ra, app_dec = uvutils.calc_app_coords(
-            zenith_coord.ra.to_value("rad"),
-            zenith_coord.dec.to_value("rad"),
+        app_ra, app_dec = uvutils.phasing.calc_app_coords(
+            lon_coord=zenith_coord.ra.to_value("rad"),
+            lat_coord=zenith_coord.dec.to_value("rad"),
             time_array=obstimes.utc.jd,
             telescope_loc=telescope_location,
         )
@@ -103,7 +103,7 @@ def phase_past_zenith(
     _lsts = np.tile(lsts, len(bls_enu))
     uvws = np.repeat(bls_enu, len(lsts), axis=0)
 
-    out = uvutils.calc_uvw(
+    out = uvutils.phasing.calc_uvw(
         app_ra=app_ra,
         app_dec=app_dec,
         lst_array=_lsts,
diff --git a/src/py21cmsense/observatory.py b/src/py21cmsense/observatory.py
index 876b988..ee6dc95 100644
--- a/src/py21cmsense/observatory.py
+++ b/src/py21cmsense/observatory.py
@@ -146,9 +146,9 @@ def clone(self, **kwargs) -> Observatory:
     def from_uvdata(cls, uvdata, beam: beam.PrimaryBeam, **kwargs) -> Observatory:
         """Instantiate an Observatory from a :class:`pyuvdata.UVData` object."""
         return cls(
-            antpos=uvdata.antenna_positions,
+            antpos=uvdata.telescope.antenna_positions,
             beam=beam,
-            latitude=uvdata.telescope_location_lat_lon_alt[0],
+            latitude=uvdata.telescope.location.lat,
             **kwargs,
         )
 
diff --git a/src/py21cmsense/sensitivity.py b/src/py21cmsense/sensitivity.py
index b91145e..754e8d7 100644
--- a/src/py21cmsense/sensitivity.py
+++ b/src/py21cmsense/sensitivity.py
@@ -476,9 +476,9 @@ def _average_sense_to_1d(
         self, sense: dict[tp.Wavenumber, tp.Delta], k1d: tp.Wavenumber | None = None
     ) -> tp.Delta:
         """Bin 2D sensitivity down to 1D."""
-        sense1d_inv = np.zeros(len(self.k1d)) / un.mK**4
         if k1d is None:
             k1d = self.k1d
+        sense1d_inv = np.zeros(len(k1d)) / un.mK**4
 
         for k_perp in tqdm.tqdm(
             sense.keys(),
diff --git a/tests/test_observatory.py b/tests/test_observatory.py
index 8d4b20d..e911f7c 100644
--- a/tests/test_observatory.py
+++ b/tests/test_observatory.py
@@ -119,11 +119,17 @@ def test_min_max_antpos(bm):
 
 def test_from_uvdata(bm):
     uv = pyuvdata.UVData()
-    uv.antenna_positions = np.array([[0, 0, 0], [0, 1, 0], [1, 0, 0], [40, 0, 40]]) * units.m
-    uv.telescope_location = [x.value for x in EarthLocation.from_geodetic(0, 0).to_geocentric()]
+    uv.telescope.antenna_positions = (
+        np.array([[0, 0, 0], [0, 1, 0], [1, 0, 0], [40, 0, 40]]) * units.m
+    )
+    uv.telescope.location = [x.value for x in EarthLocation.from_geodetic(0, 0).to_geocentric()]
+    uv.telescope.antenna_positions = (
+        np.array([[0, 0, 0], [0, 1, 0], [1, 0, 0], [40, 0, 40]]) * units.m
+    )
+    uv.telescope.location = EarthLocation.from_geodetic(0, 0)
 
     a = Observatory.from_uvdata(uvdata=uv, beam=bm)
-    assert np.all(a.antpos == uv.antenna_positions)
+    assert np.all(a.antpos == uv.telescope.antenna_positions)
 
 
 def test_different_antpos_loaders(tmp_path: Path):
diff --git a/tests/test_sensitivity.py b/tests/test_sensitivity.py
index 64bef03..eeb170c 100644
--- a/tests/test_sensitivity.py
+++ b/tests/test_sensitivity.py
@@ -61,6 +61,9 @@ def test_sensitivity_2d_grid(observation, caplog):
 def test_sensitivity_1d_binned(observation):
     ps = PowerSpectrum(observation=observation)
     assert np.all(ps.calculate_sensitivity_1d() == ps.calculate_sensitivity_1d_binned(ps.k1d))
+    kbins = np.linspace(0.1, 0.5, 10) * littleh / units.Mpc
+    sense1d_sample = ps.calculate_sensitivity_1d_binned(k=kbins)
+    assert len(sense1d_sample) == len(kbins)
 
 
 def test_plots(observation):
diff --git a/tests/test_uvw.py b/tests/test_uvw.py
index a61b2ac..da48165 100644
--- a/tests/test_uvw.py
+++ b/tests/test_uvw.py
@@ -120,8 +120,8 @@ def test_calc_app_coords(lat, time_past_zenith):
 
     ra = zenith_coord.ra.to_value("rad")
     dec = zenith_coord.dec.to_value("rad")
-    app_ra, app_dec = uvutils.calc_app_coords(
-        ra, dec, time_array=obstime.utc.jd, telescope_loc=telescope_location
+    app_ra, app_dec = uvutils.phasing.calc_app_coords(
+        lon_coord=ra, lat_coord=dec, time_array=obstime.utc.jd, telescope_loc=telescope_location
     )
 
     assert np.isclose(app_ra, ra, atol=0.02)  # give it 1 degree wiggle room.