diff --git a/tests/testdata/control_images/qgis_server/WMS_GetPrint_Dimension/WMS_GetPrint_Dimension_mask.png b/tests/testdata/control_images/qgis_server/WMS_GetPrint_Dimension/WMS_GetPrint_Dimension_mask.png
index 3b0b2479a75..3937d8c6fc2 100644
Binary files a/tests/testdata/control_images/qgis_server/WMS_GetPrint_Dimension/WMS_GetPrint_Dimension_mask.png and b/tests/testdata/control_images/qgis_server/WMS_GetPrint_Dimension/WMS_GetPrint_Dimension_mask.png differ