diff --git a/pytest.ini b/pytest.ini
index 9911833f..b64c2877 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -70,3 +70,4 @@ filterwarnings =
     ignore:pkg_resources is deprecated as an API.*:DeprecationWarning
     ignore:Deprecated call to .*pkg_resources\.declare_namespace.*mpl_toolkits.*:DeprecationWarning
     ignore:Extension .*sunpy-1\.0\.0:asdf.exceptions.AsdfManifestURIMismatchWarning
+    ignore:created with extension URI 'asdf://astropy.org/core/extensions/core-1.5.0' (from package asdf-astropy==0.5.0), which is not currently installed