diff --git a/test_data/images/gallery_tests.test_plot_COP_maps.0.png b/test_data/images/gallery_tests.test_plot_COP_maps.0.png
index 886f7f4..3845282 100644
Binary files a/test_data/images/gallery_tests.test_plot_COP_maps.0.png and b/test_data/images/gallery_tests.test_plot_COP_maps.0.png differ