diff --git a/tests/test_linalg/test_valid.py b/tests/test_linalg/test_valid.py
index 117c1673..2023ae75 100644
--- a/tests/test_linalg/test_valid.py
+++ b/tests/test_linalg/test_valid.py
@@ -7,7 +7,7 @@
 
 
 def test_valid():
-    a = np.array([[np.NaN, np.NaN], [np.NaN, 4]])
+    a = np.array([[np.nan, np.nan], [np.nan, 4]])
     v, mat = valid(a)
 
     assert np.allclose(mat, np.array([[4]]))