diff --git a/lib/iris/tests/results/netcdf/netcdf_merc.cml b/lib/iris/tests/results/netcdf/netcdf_merc.cml
index ef239bb2f2..198d72759d 100644
--- a/lib/iris/tests/results/netcdf/netcdf_merc.cml
+++ b/lib/iris/tests/results/netcdf/netcdf_merc.cml
@@ -53,15 +53,15 @@
 		 45.5158, 45.9993]]" shape="(192, 192)" standard_name="longitude" units="Unit('degrees')" value_type="float32" var_name="lon"/>
       </coord>
       <coord datadims="[1]">
-        <dimCoord id="a2415886" points="[-5.16102e+06, -5.10719e+06, -5.05336e+06, ...,
+        <dimCoord id="da580c54" points="[-5.16102e+06, -5.10719e+06, -5.05336e+06, ...,
 		5.01299e+06, 5.06682e+06, 5.12065e+06]" shape="(192,)" standard_name="projection_x_coordinate" units="Unit('m')" value_type="float32" var_name="x">
-          <mercator ellipsoid="GeogCS(6378169.0)" longitude_of_projection_origin="0.0"/>
+          <mercator ellipsoid="GeogCS(6378169.0)" longitude_of_projection_origin="0.0" max_latitude="84.0" min_latitude="-80.0" true_scale_lat="0.0"/>
         </dimCoord>
       </coord>
       <coord datadims="[0]">
-        <dimCoord id="41466ff9" points="[5.16101e+06, 5.10718e+06, 5.05335e+06, ...,
+        <dimCoord id="caf0a46a" points="[5.16101e+06, 5.10718e+06, 5.05335e+06, ...,
 		-5.01294e+06, -5.06678e+06, -5.12061e+06]" shape="(192,)" standard_name="projection_y_coordinate" units="Unit('m')" value_type="float32" var_name="y">
-          <mercator ellipsoid="GeogCS(6378169.0)" longitude_of_projection_origin="0.0"/>
+          <mercator ellipsoid="GeogCS(6378169.0)" longitude_of_projection_origin="0.0" max_latitude="84.0" min_latitude="-80.0" true_scale_lat="0.0"/>
         </dimCoord>
       </coord>
       <coord>