@@ -1,3 +1,4 @@
+import copy
 import numpy as np
 
 import matplotlib as mpl
@@ -43,6 +44,9 @@ def test_imagegrid_cbar_mode_edge():
         # "second" ones.  To achieve this, clear out the axes first.
         for ax in grid:
             ax.cax.cla()
+            # We don't want to share the norms between the colorbar axes
+            # so create a deepcopy for each image
+            ax.images[0].norm = copy.deepcopy(ax.images[0].norm)
             cb = ax.cax.colorbar(
                 ax.images[0],
                 ticks=mpl.ticker.MaxNLocator(5))  # old default locator.