TST: Mark macosx backend in leak test as xfail

Author: QuLogic

lib/matplotlib/tests/test_backends_interactive.py

@@ -660,7 +660,7 @@ def _test_figure_leak():
                     reason="appveyor tests fail; gh-22988 suggests reworking")
 @pytest.mark.parametrize("env", _get_testable_interactive_backends())
 @pytest.mark.parametrize("time_mem", [(0.0, 2_000_000), (0.1, 30_000_000)])
-def test_figure_leak_20490(env, time_mem):
+def test_figure_leak_20490(env, time_mem, request):
     pytest.importorskip("psutil", reason="psutil needed to run this test")
 
     # We haven't yet directly identified the leaks so test with a memory growth
@@ -669,9 +669,10 @@ def test_figure_leak_20490(env, time_mem):
     if env["MPLBACKEND"] == "wx":
         pytest.skip("wx backend is deprecated; tests failed on appveyor")
 
-    if env["MPLBACKEND"] == "macosx" or (
-            env["MPLBACKEND"] == "tkagg" and sys.platform == 'darwin'
-    ):
+    if env["MPLBACKEND"] == "macosx":
+        request.node.add_marker(pytest.mark.xfail(reason="macosx backend is leaky"))
+
+    if env["MPLBACKEND"] == "tkagg" and sys.platform == "darwin":
         acceptable_memory_leakage += 11_000_000
 
     result = _run_helper(