diff --git a/tests/test_common.py b/tests/test_common.py
index 088e6442..fb990e7e 100644
--- a/tests/test_common.py
+++ b/tests/test_common.py
@@ -224,3 +224,14 @@ def test_remove_numeric_parentheses():
     assert common.remove_numeric_parentheses('C2H5(547)H') == 'C2H5(547)H'
     assert common.remove_numeric_parentheses('HNO(T)(21)') == 'HNO(T)'
 
+
+def test_numpy_to_list():
+    """Test the numpy_to_list() function"""
+    import numpy as np
+    assert common.numpy_to_list(np.array([1, 2, 3])) == [1, 2, 3]
+    assert common.numpy_to_list(np.array([1.0, 2.0, 3.0])) == [1.0, 2.0, 3.0]
+    assert common.numpy_to_list(np.array([1.0, 2.0, 3.0], dtype=np.float32)) == [1.0, 2.0, 3.0]
+    assert common.numpy_to_list(np.array([1.0, 2.0, 3.0], dtype=np.float64)) == [1.0, 2.0, 3.0]
+    assert common.numpy_to_list(np.array([1, 2, 3], dtype=np.int32)) == [1, 2, 3]
+    assert common.numpy_to_list(np.array([1, 2, 3], dtype=np.int64)) == [1, 2, 3]
+    assert common.numpy_to_list(np.array([1, 2, 3], dtype=np.bool_)) == [True, True, True]