diff --git a/conftest.py b/conftest.py
index 25275e11aa1d3..c4bed49c6df70 100644
--- a/conftest.py
+++ b/conftest.py
@@ -9,6 +9,6 @@
 # the doctests pass
 import numpy as np
 try:
-    np.set_printoptions(sign='legacy')
+    np.set_printoptions(legacy=True)
 except TypeError:
     pass