diff --git a/python/tests/test_imputation.py b/python/tests/test_imputation.py
index ea1a6da251..83bead3dd6 100644
--- a/python/tests/test_imputation.py
+++ b/python/tests/test_imputation.py
@@ -664,12 +664,13 @@ def test_tsimpute(input_ref, input_query):
         (np.array([10, 20]) * 1e6, np.array([5, 15]) * 1e6, np.array([1.0, 0.5])),
         # Ungenotyped markers are right of the last genotyped marker.
         (np.array([10, 20]) * 1e6, np.array([15, 25]) * 1e6, np.array([0.5, 0.0])),
-        # TODO: Min genetic distance threshold hit.
+        # Denominator below min threshold.
+        (np.array([10, 20]), np.array([15]), np.array([0.001])),
     ],
 )
 def test_get_weights(genotyped_pos, ungenotyped_pos, expected):
     # TODO: Test indices.
     actual = tests.beagle.get_weights(genotyped_pos, ungenotyped_pos)
-    np.testing.assert_array_equal(actual, expected)
+    np.testing.assert_allclose(actual, expected)
     actual, _ = tests.beagle_numba.get_weights(genotyped_pos, ungenotyped_pos)
-    np.testing.assert_array_equal(actual, expected)
+    np.testing.assert_allclose(actual, expected)