1 files changed, 3 insertions, 3 deletions
diff --git a/bootstraptest/test_io.rb b/bootstraptest/test_io.rb
index 89c00d0b88..731c3e4cc5 100644
--- a/bootstraptest/test_io.rb
+++ b/bootstraptest/test_io.rb
@@ -30,11 +30,11 @@ assert_finish 10, %q{
   end
 }, '[ruby-dev:32566]'
 
-assert_finish 1, %q{
+assert_finish 2, %q{
   r, w = IO.pipe
-  Thread.new {
+  Thread.new(Thread.current) { |parent|
     w << "ab"
-    sleep 0.01
+    Thread.pass until parent.stop?
     w << "ab"
   }
   r.gets("abab")