Bug 1622446 - Fix default value for expected status, r=remote-protoco…

…l-reviewers,whimboo

Differential Revision: https://phabricator.services.mozilla.com/D66945

--HG--
extra : moz-landing-system : lando

remote/mach_commands.py

@@ -207,7 +207,7 @@ def __call__(self, line):
         if m:
             status, test_name = m.groups()
             status = self.status_map.get(status, status)
-            expected = self.expected.get(test_name, "PASS")
+            expected = self.expected.get(test_name, ["PASS"])
             known_intermittent = expected[1:]
             expected_status = expected[0]