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-rw-r--r--tool/lib/test/unit/core_assertions.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/tool/lib/test/unit/core_assertions.rb b/tool/lib/test/unit/core_assertions.rb
index 118c0d111b..c7762f05ab 100644
--- a/tool/lib/test/unit/core_assertions.rb
+++ b/tool/lib/test/unit/core_assertions.rb
@@ -278,7 +278,7 @@ module Test
capture_stdout = false
opt[:out] = MiniTest::Unit.output if defined?(MiniTest::Unit)
res_p, res_c = IO.pipe
- opt[res_c.fileno] = res_c.fileno
+ opt[:ios] = [res_c]
end
src = <<eom
# -*- coding: #{line += __LINE__; src.encoding}; -*-