diff --git a/tests/conftest.py b/tests/conftest.py
index 768d9d5..8db3785 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -81,7 +81,6 @@ def create_dem(
     Create a 2 band DEM file that covers the ortho bounds of the given `camera`.
     Band 1 is a sinusoidal surface, and band 2, a planar surface.
     """
-    # TODO: add partial dem fixture
     # wgs84_bounds = transform_bounds(rio.CRS.from_string(ortho_crs_wgs84_vdatum), dem_crs, *bounds)
     # size = 1 + np.ceil((bounds[2:] - bounds[:2]) / (30, 30)).astype('int')
     # transform = from_bounds(*wgs84_bounds, *size)
@@ -534,7 +533,7 @@ def ngi_crs(ngi_image_file) -> str:
         crs = im.crs
     return crs.to_proj4()
 
-# TODO: move fixtures used by a single module to that module
+
 @pytest.fixture(scope='session')
 def ngi_legacy_config_file() -> Path:
     """ Legacy format configuration file for NGI test data. """
@@ -582,3 +581,5 @@ def odm_lla_rpy_csv_file() -> Path:
     """
     return root_path.joinpath('tests', 'data', 'io', 'odm_lla_rpy.csv')
 
+
+# TODO: move fixtures used by a single module to that module
diff --git a/tests/test_camera.py b/tests/test_camera.py
index 5adc94e..d1548b6 100644
--- a/tests/test_camera.py
+++ b/tests/test_camera.py
@@ -209,9 +209,9 @@ def test_project_im_size(
     test_camera_args['im_size'] = tuple(np.array(test_camera_args['im_size']) * scale)
     test_camera = create_camera(cam_type, **test_camera_args, **dist_param)
 
-    # find reference and test camera coords for world pts corresponding to reference image corners
-    ref_br = np.array(ref_camera._im_size) - 1
-    ref_ji = np.array([[0, 0], [ref_br[0], 0], ref_br, [0, ref_br[1]]]).T
+    # find reference and test camera coords for world pts corresponding to reference image boundary pts
+    w, h = np.array(ref_camera._im_size) - 1
+    ref_ji = np.array([[0, 0], [w / 2, 0], [w, 0], [w, h / 2], [w, h], [w / 2, h], [0, h], [0, h / 2]]).T
     xyz = ref_camera.pixel_to_world_z(ref_ji, 0)
     test_ji = test_camera.world_to_pixel(xyz)
     ref_xy = ref_camera._pixel_to_camera(ref_ji)[:2]
diff --git a/tests/test_ortho.py b/tests/test_ortho.py
index 91b2c7e..a016207 100644
--- a/tests/test_ortho.py
+++ b/tests/test_ortho.py
@@ -279,7 +279,6 @@ def test_mask_dem(
     #  DEM < camera height to ensure no ortho artefacts in DEM > camera height areas.  While the DEM mask excludes
     #  (boundary) occluded pixels, the ortho image mask does not i.e. to compare these masks, there should be no
     #  DEM - ortho occlusion.
-    # TODO: add test with dem that includes occlusion
     _xyz = tuple(np.array(camera_args['xyz']) + xyz_offset)
     _opk = tuple(np.array(camera_args['opk']) + np.radians(opk_offset))
     camera: Camera = PinholeCamera(
@@ -866,6 +865,6 @@ def test_process_camera(
         assert src_array.std() == pytest.approx(ortho_array[:, ortho_mask].std(), abs=15)
 
 
-# TODO: dem reproject changes bounds with different v datum
+# TODO: add test with dem that includes occlusion
 # TODO: add tests for other CRSs, spec'd in proj4 string, with vertical datum & with ortho & DEM in different CRSs
 ##