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-rw-r--r--test/csv/test_serialization.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/test/csv/test_serialization.rb b/test/csv/test_serialization.rb
index f8e6df1b1d..5f0201ed90 100644
--- a/test/csv/test_serialization.rb
+++ b/test/csv/test_serialization.rb
@@ -133,7 +133,7 @@ class TestSerialization < Test::Unit::TestCase
test_class_dump
data_file = File.join(File.dirname(__FILE__), "temp_test_data.csv")
- CSV.dump(@names, File.open(data_file, "w"))
+ CSV.dump(@names, File.open(data_file, "wb"))
assert(File.exist?(data_file))
assert_equal(<<-END_IO_DUMP.gsub(/^\s*/, ""), File.read(data_file))