diff --git a/docs/iris/src/common_links.inc b/docs/iris/src/common_links.inc
index 050752a483..9f6a57f529 100644
--- a/docs/iris/src/common_links.inc
+++ b/docs/iris/src/common_links.inc
@@ -42,6 +42,7 @@
 .. _@djkirkham: https://github.com/djkirkham
 .. _@DPeterK: https://github.com/DPeterK
 .. _@esc24: https://github.com/esc24
+.. _@jamesp: https://github.com/jamesp
 .. _@jonseddon: https://github.com/jonseddon
 .. _@jvegasbsc: https://github.com/jvegasbsc
 .. _@lbdreyer: https://github.com/lbdreyer
diff --git a/docs/iris/src/whatsnew/latest.rst b/docs/iris/src/whatsnew/latest.rst
index 3cdf5fe691..618eeb10d6 100644
--- a/docs/iris/src/whatsnew/latest.rst
+++ b/docs/iris/src/whatsnew/latest.rst
@@ -82,6 +82,7 @@ This document explains the changes made to Iris for this release
 
 #. `@rcomer`_ removed an old unused test file. (:pull:`3913`)
 
+#. `@jamesp`_ updated a test to the latest numpy version (:pull:`3977`)
 
 .. comment
     Whatsnew author names (@github name) in alphabetical order. Note that,
diff --git a/lib/iris/tests/test_basic_maths.py b/lib/iris/tests/test_basic_maths.py
index 4b3cde95e4..c4d7b51a06 100644
--- a/lib/iris/tests/test_basic_maths.py
+++ b/lib/iris/tests/test_basic_maths.py
@@ -853,7 +853,7 @@ def setUp(self):
 
     def test_incompatible_dimensions(self):
         data3 = ma.MaskedArray(
-            [[3, 3, 3, 4], [2, 2, 2]], mask=[[0, 1, 0, 0], [0, 1, 1]]
+            [[3, 3, 3, 4], [2, 2, 2, 2]], mask=[[0, 1, 0, 0], [0, 1, 1, 1]]
         )
         with self.assertRaises(ValueError):
             # Incompatible dimensions.