diff --git a/python/tests/beagle.py b/python/tests/beagle.py
index 66ef7a85b4..bea95537c3 100644
--- a/python/tests/beagle.py
+++ b/python/tests/beagle.py
@@ -60,7 +60,7 @@ def convert_to_genetic_map_position(pos):
     :return: Genetic map positions.
     :rtype: numpy.ndarray
     """
-    assert 0 <= np.min(pos)
+    assert 0 < np.min(pos)
     return pos / 1e6
 
 
diff --git a/python/tests/beagle_numba.py b/python/tests/beagle_numba.py
index e58529bb76..7b23d21873 100644
--- a/python/tests/beagle_numba.py
+++ b/python/tests/beagle_numba.py
@@ -24,7 +24,7 @@ def convert_to_genetic_map_position(pos):
     :return: Genetic map positions.
     :rtype: numpy.ndarray
     """
-    assert 0 <= np.min(pos)
+    assert 0 < np.min(pos)
     return pos / 1e6