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-rw-r--r--railties/lib/console_app.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/railties/lib/console_app.rb b/railties/lib/console_app.rb
index b23cda9da0..0030b2bb3a 100644
--- a/railties/lib/console_app.rb
+++ b/railties/lib/console_app.rb
@@ -1,7 +1,7 @@
require 'action_controller/integration'
# work around the at_exit hook in test/unit, which kills IRB
-Test::Unit.run = true
+Test::Unit.run = Test::Unit.respond_to?(:run=)
# reference the global "app" instance, created on demand. To recreate the
# instance, pass a non-false value as the parameter.