Subject: [PATCH] tests: count replacements when checking the worker restart limit

With two workers, another in-flight test may crash after the fourth
crash requests shutdown. Either four or five failed tests is valid.
Require exactly three replacements and the failed-tests exit status,
while preserving the queued-work and no-internal-error assertions.

--- a/testing/acceptance_test.py
+++ b/testing/acceptance_test.py
@@ -1011,9 +1011,18 @@
                 "worker*crashed while running*",
                 "worker*crashed while running*",
                 "* xdist: maximum crashed workers reached: 3 *",
-                "* 4 failed in *",
             ]
         )
+        # A second in-flight test may crash after shutdown is requested.
+        # The restart limit constrains replacements, not concurrent failures.
+        replacements = sum(
+            line.startswith("replacing crashed worker ") for line in res.stdout.lines
+        )
+        assert replacements == 3
+        failed = res.parseoutcomes()["failed"]
+        assert failed in (4, 5)
+        res.assert_outcomes(failed=failed)
+        assert res.ret == pytest.ExitCode.TESTS_FAILED
         assert "INTERNALERROR" not in res.stdout.str()
 
     def test_max_worker_restart_die(self, pytester: pytest.Pytester) -> None: