diff --git a/yt_idv/tests/test_spherical_vol_rendering.py b/yt_idv/tests/test_spherical_vol_rendering.py
index 2aef012..0e18acd 100644
--- a/yt_idv/tests/test_spherical_vol_rendering.py
+++ b/yt_idv/tests/test_spherical_vol_rendering.py
@@ -37,7 +37,7 @@ def test_spherical_bounds(osmesa_empty_rc, image_store, bbox_option):
     sz = (32, 32, 32)
     fake_data = {"density": np.random.random(sz)}
 
-    bbox = bbox_options[bbox_option]
+    bbox = bbox_options[bbox_option]["bbox"]
 
     ds = yt.load_uniform_grid(
         fake_data,
@@ -67,7 +67,7 @@ def test_spherical_nprocs(osmesa_empty_rc, image_store, nprocs):
     fake_data = {"density": np.random.random(sz)}
 
     bbox_option = "whole"
-    bbox = bbox_options[bbox_option]
+    bbox = bbox_options[bbox_option]["bbox"]
 
     ds = yt.load_uniform_grid(
         fake_data,