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')
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