diff --git a/tests/testdata/control_images/qgis_server/WMS_GetPrint_Highlight_Empty_Labels/WMS_GetPrint_Highlight_Empty_Labels_mask.png b/tests/testdata/control_images/qgis_server/WMS_GetPrint_Highlight_Empty_Labels/WMS_GetPrint_Highlight_Empty_Labels_mask.png
index beedc8e286bd..e10f1634c450 100644
Binary files a/tests/testdata/control_images/qgis_server/WMS_GetPrint_Highlight_Empty_Labels/WMS_GetPrint_Highlight_Empty_Labels_mask.png and b/tests/testdata/control_images/qgis_server/WMS_GetPrint_Highlight_Empty_Labels/WMS_GetPrint_Highlight_Empty_Labels_mask.png differ