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-rw-r--r--railties/test/isolation/abstract_unit.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/railties/test/isolation/abstract_unit.rb b/railties/test/isolation/abstract_unit.rb
index 39e8a5f756..17c3f979c0 100644
--- a/railties/test/isolation/abstract_unit.rb
+++ b/railties/test/isolation/abstract_unit.rb
@@ -341,7 +341,7 @@ class ActiveSupport::TestCase
def silence_stream(stream)
old_stream = stream.dup
- stream.reopen(RbConfig::CONFIG['host_os'] =~ /mswin|mingw/ ? 'NUL:' : '/dev/null')
+ stream.reopen(IO::NULL)
stream.sync = true
yield
ensure