diff --git a/docs/src/whatsnew/latest.rst b/docs/src/whatsnew/latest.rst
index 12720cecae..9494dcea59 100644
--- a/docs/src/whatsnew/latest.rst
+++ b/docs/src/whatsnew/latest.rst
@@ -177,6 +177,8 @@ This document explains the changes made to Iris for this release
    Note: this object is temporary and is likely to be replaced by a permanent solution or else be renamed.
    (:issue:`7094`, :pull:`7134`)
 
+#. `@rcomer`_ fixed the capitalisation of a pytest marker. (:pull:`7163`)
+
 .. comment
     Whatsnew author names (@github name) in alphabetical order. Note that,
     core dev names are automatically included by the common_links.inc:
diff --git a/lib/iris/tests/graphics/__init__.py b/lib/iris/tests/graphics/__init__.py
index 2c9fc0b345..04c25131fb 100644
--- a/lib/iris/tests/graphics/__init__.py
+++ b/lib/iris/tests/graphics/__init__.py
@@ -285,7 +285,7 @@ def skip_plot(fn: Callable) -> Callable:
     ...     pass
 
     """
-    skip = pytest.mark.skipIf(
+    skip = pytest.mark.skipif(
         condition=not MPL_AVAILABLE,
         reason="Graphics tests require the matplotlib library.",
     )