diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
index ac9dd0787a43..f1074d38e567 100644
--- a/lib/matplotlib/tests/test_axes.py
+++ b/lib/matplotlib/tests/test_axes.py
@@ -2502,7 +2502,7 @@ def test_contour_hatching():
 
 @image_comparison(
     ['contour_colorbar'], style='mpl20',
-    tol=0.02 if platform.machine() in ('aarch64', 'ppc64le', 's390x') else 0)
+    tol=0.54 if platform.machine() in ('aarch64', 'ppc64le', 's390x') else 0)
 def test_contour_colorbar():
     x, y, z = contour_dat()
 
diff --git a/lib/mpl_toolkits/mplot3d/tests/test_axes3d.py b/lib/mpl_toolkits/mplot3d/tests/test_axes3d.py
index ad04b12526c2..644e2f245812 100644
--- a/lib/mpl_toolkits/mplot3d/tests/test_axes3d.py
+++ b/lib/mpl_toolkits/mplot3d/tests/test_axes3d.py
@@ -1,5 +1,6 @@
 import functools
 import itertools
+import platform
 
 import pytest
 
@@ -217,7 +218,9 @@ def test_bar3d_lightsource():
     np.testing.assert_array_max_ulp(color, collection._facecolor3d[1::6], 4)
 
 
-@mpl3d_image_comparison(['contour3d.png'], style='mpl20')
+@mpl3d_image_comparison(
+    ['contour3d.png'], style='mpl20',
+    tol=0.002 if platform.machine() in ('aarch64', 'ppc64le', 's390x') else 0)
 def test_contour3d():
     fig = plt.figure()
     ax = fig.add_subplot(projection='3d')