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-rw-r--r--test/lib/test/unit.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/test/lib/test/unit.rb b/test/lib/test/unit.rb
index dfbccc0..fbd0f18 100644
--- a/test/lib/test/unit.rb
+++ b/test/lib/test/unit.rb
@@ -177,7 +177,7 @@ module Test
class Worker
def self.launch(ruby,args=[])
- io = IO.popen([*ruby,
+ io = IO.popen([*ruby, "-W1",
"#{File.dirname(__FILE__)}/unit/parallel.rb",
*args], "rb+")
new(io, io.pid, :waiting)