diff --git a/lib/iris/tests/test_plot.py b/lib/iris/tests/test_plot.py
index 2b9f38688f..fde1f01a49 100644
--- a/lib/iris/tests/test_plot.py
+++ b/lib/iris/tests/test_plot.py
@@ -332,6 +332,7 @@ def setUp(self):
 
 @tests.skip_data
 @tests.skip_plot
+@tests.skip_biggus
 class TestAttributePositive(tests.GraphicsTest):
     def test_1d_positive_up(self):
         path = tests.get_data_path(('NetCDF', 'ORCA2', 'votemper.nc'))
@@ -925,6 +926,7 @@ def test_different_coord_systems(self):
 
 @tests.skip_data
 @tests.skip_plot
+@tests.skip_biggus
 class TestPlotOtherCoordSystems(tests.GraphicsTest):
     def test_plot_tmerc(self):
         filename = tests.get_data_path(('NetCDF', 'transverse_mercator',