TST: run test that might crash in a subprocess

Author: ngoldbaum

lib/matplotlib/tests/test_backend_macosx.py

@@ -87,9 +87,7 @@ def test_save_figure_return():
                           extra_env={"MPLBACKEND": "macosx"})
 
 
-@pytest.mark.backend('macosx', skip_on_importerror=True)
-def test_create_figure_on_worker_thread_fails():
-
+def _test_create_figure_on_worker_thread_fails():
     def create_figure():
         warn_msg = "Matplotlib GUI outside of the main thread will likely fail."
         err_msg = "Cannot create a GUI FigureManager outside the main thread"
@@ -100,3 +98,12 @@ def create_figure():
     worker = threading.Thread(target=create_figure)
     worker.start()
     worker.join()
+
+
+@pytest.mark.backend('macosx', skip_on_importerror=True)
+def test_create_figure_on_worker_thread_fails():
+    subprocess_run_helper(
+        _test_create_figure_on_worker_thread_fails,
+        timeout=_test_timeout,
+        extra_env={"MPLBACKEND": "macosx"}
+    )