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-rw-r--r--test/rdoc/test_rdoc_ri_driver.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/test/rdoc/test_rdoc_ri_driver.rb b/test/rdoc/test_rdoc_ri_driver.rb
index 8d64916088..9ff89077b6 100644
--- a/test/rdoc/test_rdoc_ri_driver.rb
+++ b/test/rdoc/test_rdoc_ri_driver.rb
@@ -499,6 +499,10 @@ Foo::Bar#bother
driver = RDoc::RI::Driver.new
io = Object.new
+ def io.tty?; false; end
+
+ assert_instance_of @RM::ToBs, driver.formatter(io)
+
def io.tty?; true; end
assert_instance_of @RM::ToAnsi, driver.formatter(io)