--- coverage-7.6.9/tests/test_concurrency.py.orig
+++ coverage-7.6.9/tests/test_concurrency.py
@@ -735,8 +735,8 @@
             """ + ("sigterm = true" if sigterm else ""),
             )
         out = self.run_command("coverage run clobbered.py")
-        # Under Linux, things go wrong. Does that matter?
-        if env.LINUX and "assert self._collectors" in out:
+        # Under Linux and illumos, things go wrong. Does that matter?
+        if (env.LINUX or sys.platform == "sunos5") and "assert self._collectors" in out:
             lines = out.splitlines(True)
             out = "".join(lines[:3])
         assert out == "START\nNOT THREE\nEND\n"