diff --git a/libc/testlib/testmain.c b/libc/testlib/testmain.c
index 083a2daa2..55d34f80f 100644
--- a/libc/testlib/testmain.c
+++ b/libc/testlib/testmain.c
@@ -105,7 +105,7 @@ int main(int argc, char *argv[]) {
   __log_level = kLogInfo;
   GetOpts(argc, argv);
 
-  for (fd = 3; fd < 10; ++fd) {
+  for (fd = 3; fd < 100; ++fd) {
     close(fd);
   }