1 files changed, 2 insertions, 2 deletions
diff --git a/test/io/nonblock/test_flush.rb b/test/io/nonblock/test_flush.rb
index 4f56d00829..40dbe94b3a 100644
--- a/test/io/nonblock/test_flush.rb
+++ b/test/io/nonblock/test_flush.rb
@@ -23,7 +23,7 @@ class TestIONonblock < Test::Unit::TestCase
       end
     }
     assert_raise(IOError) {w.flush}
-    t.join
-    assert_equal("b", result)
+    assert_nothing_raised {t.join}
+    assert_equal(4097, result.size)
   end
 end if IO.method_defined?(:nonblock)