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-rw-r--r--activesupport/test/abstract_unit.rb3
1 files changed, 3 insertions, 0 deletions
diff --git a/activesupport/test/abstract_unit.rb b/activesupport/test/abstract_unit.rb
index 7e3ff50ac9..8e237beac2 100644
--- a/activesupport/test/abstract_unit.rb
+++ b/activesupport/test/abstract_unit.rb
@@ -2,3 +2,6 @@ require 'test/unit'
$:.unshift "#{File.dirname(__FILE__)}/../lib"
require 'active_support'
+
+# Show backtraces for deprecated behavior for quicker cleanup.
+ActiveSupport::Deprecation.debug = true