diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 2fc28f67a9..a46cf307b0 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -3361,7 +3361,7 @@ __END__
       }
 
       IO.select(tempfiles)
-    }, bug8080, timeout: 50
+    }, bug8080, timeout: 100
   end if defined?(Process::RLIMIT_NOFILE)
 
   def test_read_32bit_boundary