TST: account for flakiness with Numpy v1 (matplotlib#30950)

QuLogic · timhoffm · web-flow · commit a5cc2304b5e2 · 2026-01-12T17:44:51.000-05:00
* TST: account for flakiness with Numpy v1

* Expand comment with instructions

Co-authored-by: Tim Hoffmann &lt;2836374+timhoffm@users.noreply.github.com&gt;

---------

Co-authored-by: Tim Hoffmann &lt;2836374+timhoffm@users.noreply.github.com&gt;
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
@@ -1576,6 +1576,9 @@ def test_pcolor_log_scale(fig_test, fig_ref):
     when using pcolor.
     """
     x = np.linspace(0, 1, 11)
+    # Ensuring second x value always falls slightly above 0.1 prevents flakiness with
+    # numpy v1 #30882. This can be removed once we require numpy >= 2.
+    x[1] += 0.00001
     y = np.linspace(1, 2, 5)
     X, Y = np.meshgrid(x, y)
     C = X[:-1, :-1] + Y[:-1, :-1]
diff --git a/lib/matplotlib/tests/test_ticker.py b/lib/matplotlib/tests/test_ticker.py
@@ -6,7 +6,7 @@
 from packaging.version import parse as parse_version
 
 import numpy as np
-from numpy.testing import assert_almost_equal, assert_array_equal
+from numpy.testing import assert_almost_equal, assert_array_equal, assert_allclose
 import pytest
 
 import matplotlib as mpl
@@ -1935,7 +1935,10 @@ def test_bad_locator_subs(sub):
 @mpl.style.context('default')
 def test_small_range_loglocator(numticks, lims, ticks):
     ll = mticker.LogLocator(numticks=numticks)
-    assert_array_equal(ll.tick_values(*lims), ticks)
+    if parse_version(np.version.version).major < 2:
+        assert_allclose(ll.tick_values(*lims), ticks, rtol=2e-16)
+    else:
+        assert_array_equal(ll.tick_values(*lims), ticks)
 
 
 @mpl.style.context('default')
diff --git a/lib/mpl_toolkits/mplot3d/tests/test_axes3d.py b/lib/mpl_toolkits/mplot3d/tests/test_axes3d.py
@@ -3,6 +3,7 @@
 import platform
 import sys
 
+from packaging.version import parse as parse_version
 import pytest
 
 from mpl_toolkits.mplot3d import Axes3D, axes3d, proj3d, art3d
@@ -181,7 +182,8 @@ def test_bar3d_shaded():
     fig.canvas.draw()
 
 
-@mpl3d_image_comparison(['bar3d_notshaded.png'], style='mpl20')
+@mpl3d_image_comparison(['bar3d_notshaded.png'], style='mpl20',
+                        tol=0.01 if parse_version(np.version.version).major < 2 else 0)
 def test_bar3d_notshaded():
     fig = plt.figure()
     ax = fig.add_subplot(projection='3d')
