diff --git a/setup.cfg b/setup.cfg
index 3be8acd..0619342 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -8,6 +8,8 @@ astropy_header = true
 xfail_strict = true
 filterwarnings =
     error
+    ignore:numpy.ufunc size changed:RuntimeWarning
+    ignore:numpy.ndarray size changed:RuntimeWarning
     ignore::DeprecationWarning:ginga
     ignore:is empty:UserWarning