diff --git a/config/environments/development.rb b/config/environments/development.rb
index 13479dc3414..1ad4459f3c2 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -1,3 +1,5 @@
+Warning[:deprecated] = true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 467972d2e42..09ee31b58ec 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -3,6 +3,8 @@
 # your test database is "scratch space" for the test suite and is wiped
 # and recreated between test runs. Don't rely on the data there!
 
+Warning[:deprecated] = true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.