diff --git a/hera_filters/tests/test_dspec.py b/hera_filters/tests/test_dspec.py
index 5c7c3f8..0764766 100644
--- a/hera_filters/tests/test_dspec.py
+++ b/hera_filters/tests/test_dspec.py
@@ -1512,6 +1512,7 @@ def test_sparse_linear_fit_2d_non_binary_wgts():
     data = np.dot(time_basis, x_true).dot(freq_basis.T)
     flags = (time_flags | freq_flags)
 
+    # Generate separable, non-binary weights
     axis_1_weights = (~time_flags[:, 0]).astype(float) * np.random.randint(1, 10, size=(ntimes, ))
     axis_2_weights = (~freq_flags[0]).astype(float)
     wgts = np.outer(axis_1_weights, axis_2_weights)