diff --git a/src/test/regress/regress.c b/src/test/regress/regress.c
index 2e37d980af8..d68c90cd9bb 100644
--- a/src/test/regress/regress.c
+++ b/src/test/regress/regress.c
@@ -870,7 +870,10 @@ wait_pid(PG_FUNCTION_ARGS)
 		elog(ERROR, "must be superuser to check PID liveness");
 
 	while (kill(pid, 0) == 0)
+	{
+		CHECK_FOR_INTERRUPTS();
 		pg_usleep(50000);
+	}
 
 	if (errno != ESRCH)
 		elog(ERROR, "could not check PID %d liveness: %m", pid);