Index: tests/test.py
===================================================================
--- tests/test.py	(revision 721500032cac54e6e0140d924dd8656383adabc1)
+++ tests/test.py	(revision 5d10e8aae056daa069dd2d767f7a483862b90c3f)
@@ -243,5 +243,5 @@
 		return False, ""
 	except Exception as ex:
-		print("Unexpected error in worker thread: %s" % ex, file=sys.stderr)
+		print("Unexpected error in worker thread running {}: {}".format(t.target(), ex), file=sys.stderr)
 		sys.stderr.flush()
 		return False, ""