matplotlib · QuLogic · Jun 25, 2026
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
@@ -240,7 +240,7 @@ def test_matshow(fig_test, fig_ref):
 
 
 @image_comparison([f'formatter_ticker_{i:03d}.png' for i in range(1, 6)], style='mpl20',
-                  tol=0.03 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.03)
 def test_formatter_ticker():
     import matplotlib.testing.jpl_units as units
     units.register()
@@ -5608,7 +5608,7 @@ def test_marker_styles():
 
 
 @image_comparison(['rc_markerfill.png'], style='mpl20',
-                  tol=0.033 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.033)
 def test_markers_fillstyle_rcparams():
     fig, ax = plt.subplots()
     x = np.arange(7)
@@ -5631,7 +5631,7 @@ def test_vertex_markers():
 
 
 @image_comparison(['vline_hline_zorder.png', 'errorbar_zorder.png'], style='mpl20',
-                  tol=0.02 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.02)
 def test_eb_line_zorder():
     x = list(range(10))
 
@@ -6681,7 +6681,7 @@ def test_pie_linewidth_0():
 
 
 @image_comparison(['pie_center_radius.png'], style='mpl20',
-                  tol=0.01 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.01)
 def test_pie_center_radius():
     # The slices will be ordered and plotted counter-clockwise.
     labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
@@ -9901,7 +9901,7 @@ def test_zorder_and_explicit_rasterization():
 
 
 @image_comparison(["preset_clip_paths.png"], remove_text=True, style="mpl20",
-                  tol=0.01 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.01)
 def test_preset_clip_paths():
     fig, ax = plt.subplots()
 

diff --git a/lib/matplotlib/tests/test_figure.py b/lib/matplotlib/tests/test_figure.py
@@ -1397,7 +1397,7 @@ def test_subfigure_dpi():
 
 @image_comparison(['test_subfigure_ss.png'], style='mpl20',
                   savefig_kwarg={'facecolor': 'teal'},
-                  tol=0.022 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.022)
 def test_subfigure_ss():
     # test assigning the subfigure via subplotspec
     np.random.seed(19680801)

diff --git a/lib/matplotlib/tests/test_legend.py b/lib/matplotlib/tests/test_legend.py
@@ -2,7 +2,6 @@
 import io
 import itertools
 import platform
-import sys
 import time
 from unittest import mock
 import warnings
@@ -203,7 +202,7 @@ def test_alpha_rcparam():
 
 
 @image_comparison(['fancy.png'], remove_text=True, style='mpl20',
-                  tol=0.01 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.01)
 def test_fancy():
     # using subplot triggers some offsetbox functionality untested elsewhere
     plt.subplot(121)
@@ -665,7 +664,7 @@ def test_empty_bar_chart_with_legend():
 
 
 @image_comparison(['shadow_argument_types.png'], remove_text=True, style='mpl20',
-                  tol=0.028 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.028)
 def test_shadow_argument_types():
     # Test that different arguments for shadow work as expected
     fig, ax = plt.subplots()

diff --git a/lib/matplotlib/tests/test_patheffects.py b/lib/matplotlib/tests/test_patheffects.py
@@ -1,4 +1,4 @@
-import sys
+import platform
 
 import numpy as np
 
@@ -30,7 +30,7 @@ def test_patheffect1():
 
 
 @image_comparison(['patheffect2'], remove_text=True, style='mpl20',
-                  tol=0.051 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.051)
 def test_patheffect2():
 
     ax2 = plt.subplot()
@@ -46,7 +46,7 @@ def test_patheffect2():
 
 
 @image_comparison(['patheffect3'], style='mpl20',
-                  tol=0.02 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.02)
 def test_patheffect3():
     plt.figure(figsize=(8, 6))
     p1, = plt.plot([1, 3, 5, 4, 3], 'o-b', lw=4)

diff --git a/lib/matplotlib/tests/test_polar.py b/lib/matplotlib/tests/test_polar.py
@@ -1,4 +1,4 @@
-import sys
+import platform
 
 import numpy as np
 from numpy.testing import assert_allclose
@@ -12,7 +12,7 @@
 
 
 @image_comparison(['polar_axes.png'], style='default',
-                  tol=0.009 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.009)
 def test_polar_annotations():
     # You can specify the xypoint and the xytext in different positions and
     # coordinate systems, and optionally turn on a connecting line and mark the
@@ -47,7 +47,7 @@ def test_polar_annotations():
 
 
 @image_comparison(['polar_coords.png'], style='default', remove_text=True,
-                  tol=0.013 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.013)
 def test_polar_coord_annotations():
     # You can also use polar notation on a cartesian axes.  Here the native
     # coordinate system ('data') is cartesian, so you need to specify the

diff --git a/lib/mpl_toolkits/mplot3d/tests/test_axes3d.py b/lib/mpl_toolkits/mplot3d/tests/test_axes3d.py
@@ -1722,7 +1722,7 @@ def test_errorbar3d_errorevery():
 
 
 @mpl3d_image_comparison(['errorbar3d.png'], style='mpl20',
-                        tol=0.015 if sys.platform == 'darwin' else 0)
+                        tol=0 if platform.machine() == 'x86_64' else 0.015)
 def test_errorbar3d():
     """Tests limits, color styling, and legend for 3D errorbars."""
     fig = plt.figure()

diff --git a/lib/mpl_toolkits/mplot3d/tests/test_legend3d.py b/lib/mpl_toolkits/mplot3d/tests/test_legend3d.py
@@ -1,4 +1,4 @@
-import sys
+import platform
 
 import numpy as np
 
@@ -28,7 +28,7 @@ def test_legend_bar():
 
 
 @image_comparison(['fancy.png'], remove_text=True, style='mpl20',
-                  tol=0.01 if sys.platform == 'darwin' else 0)
+                  tol=0 if platform.machine() == 'x86_64' else 0.01)
 def test_fancy():
     fig, ax = plt.subplots(subplot_kw=dict(projection='3d'))
     ax.plot(np.arange(10), np.full(10, 5), np.full(10, 5), 'o--', label='line')