test: skip test_save_readonly_as on osx, which hangs/fails randomly o…

…n press('Escape')

nbclassic/tests/end_to_end/test_save_readonly_as.py

@@ -25,6 +25,8 @@ def set_notebook_name(nb, name):
 
 # on Python 3.7 we get an old playwright which hangs on body.press("Escape")
 @pytest.mark.skipif(sys.version_info < (3, 8), reason="requires python3.8 or higher due to playwright")
+# and we also see this fail on osx randomly
+@pytest.mark.skipif(sys.platform == 'darwin', reason="fails randomly on osx")
 def test_save_readonly_as(notebook_frontend):
     print('[Test] [test_save_readonly_as]')
     notebook_frontend.wait_for_kernel_ready()