Add tests for twin axes alignment with manual positioning_layout

maf2310 · maf2310 · commit c2a343cfdd9a · 2026-03-30T12:16:01.000+01:00
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
@@ -502,11 +502,13 @@ def test_twin_keeps_layout_participation_for_layout_managed_axes(twin):
 
 
 @pytest.mark.parametrize("twin", ("x", "y"))
-def test_twin_stays_aligned_after_tight_layout(twin):
-    fig,ax = plt.subplots()
+def test_twin_stays_aligned_after_constrained_layout(twin):
+    fig, ax = plt.subplots(constrained_layout=True)
+
+    ax.set_position([0.2, 0.2, 0.5, 0.5])
     ax2 = getattr(ax, f"twin{twin}")()
 
-    fig.tight_layout()
+    fig.canvas.draw()
 
     assert_allclose(ax.get_position().bounds, ax2.get_position().bounds)
 
