1 files changed, 16 insertions, 13 deletions
diff --git a/bootstraptest/test_io.rb b/bootstraptest/test_io.rb
index 20a441de9f..fa3654379f 100644
--- a/bootstraptest/test_io.rb
+++ b/bootstraptest/test_io.rb
@@ -9,17 +9,20 @@ assert_finish 5, %q{
 }, '[ruby-dev:31866]'
 
 assert_finish 10, %q{
-  require "io/nonblock"
-  r, w = IO.pipe
-  w.nonblock = true
-  w.write_nonblock("a" * 100000)
-  w.nonblock = false
-  t1 = Thread.new { w.write("b" * 4096) }
-  t2 = Thread.new { w.write("c" * 4096) }
-  sleep 0.5
-  r.sysread(4096).length
-  sleep 0.5
-  r.sysread(4096).length
-  t1.join
-  t2.join
+  begin
+    require "io/nonblock"
+    r, w = IO.pipe
+    w.nonblock = true
+    w.write_nonblock("a" * 100000)
+    w.nonblock = false
+    t1 = Thread.new { w.write("b" * 4096) }
+    t2 = Thread.new { w.write("c" * 4096) }
+    sleep 0.5
+    r.sysread(4096).length
+    sleep 0.5
+    r.sysread(4096).length
+    t1.join
+    t2.join
+  rescue LoadError
+  end
 }, '[ruby-dev:32566]'