diff --git a/improver_tests/utilities/spatial/test_DifferenceBetweenAdjacentGridSquares.py b/improver_tests/utilities/spatial/test_DifferenceBetweenAdjacentGridSquares.py
index 9cd0672e26..6db261d072 100644
--- a/improver_tests/utilities/spatial/test_DifferenceBetweenAdjacentGridSquares.py
+++ b/improver_tests/utilities/spatial/test_DifferenceBetweenAdjacentGridSquares.py
@@ -274,10 +274,10 @@ def test_3d_cube(self):
     def test_circular_non_geographic_cube_raises_approprate_exception(self):
         """Check for error and message with projection coord and circular x axis"""
         self.cube.coord(axis="x").circular = True
-        with self.assertRaises(
+        with self.assertRaisesRegex(
             NotImplementedError,
-            match="DifferenceBetweenAdjacentGridSquares does not support cubes with "
-            "circular x-axis that do not use a geographic (i.e. latlon) coordinate system.",
+            "DifferenceBetweenAdjacentGridSquares does not support cubes with "
+            r"circular x-axis that do not use a geographic \(i.e. latlon\) coordinate system.",
         ):
             self.plugin.process(self.cube)