matplotlib
diff --git a/‎lib/matplotlib/tests/test_axes.py
Copy file name to clipboardExpand all lines: lib/matplotlib/tests/test_axes.py
+5-1Lines changed: 5 additions & 1 deletion b/‎lib/matplotlib/tests/test_axes.py
Copy file name to clipboardExpand all lines: lib/matplotlib/tests/test_axes.py
+5-1Lines changed: 5 additions & 1 deletion
@@ -1878,9 +1878,12 @@ def test_stairs_fill(fig_test, fig_ref):
 
 @check_figures_equal(extensions=['png'])
 def test_stairs_update(fig_test, fig_ref):
+    # fixed ylim because stairs() does autoscale, but updating data does not
+    ylim = -3, 4
     # Test
     test_ax = fig_test.add_subplot()
     h = test_ax.stairs([1, 2, 3])
+    test_ax.set_ylim(ylim)
     h.set_values([3, 2, 1])
     h.set_edges(np.arange(4)+2)
     h.set_data([1, 2, 1], np.arange(4)/2)
@@ -1891,9 +1894,10 @@ def test_stairs_update(fig_test, fig_ref):
     h.set_baseline(-2)
     assert h.get_baseline() == -2
 
-    # # Ref
+    # Ref
     ref_ax = fig_ref.add_subplot()
     h = ref_ax.stairs([1, 2, 3], baseline=-2)
+    ref_ax.set_ylim(ylim)
 
 
 def test_stairs_invalid_nan():