1 files changed, 3 insertions, 2 deletions
diff --git a/actionpack/test/template/render_test.rb b/actionpack/test/template/render_test.rb
index c17bec891b..205fdcf345 100644
--- a/actionpack/test/template/render_test.rb
+++ b/actionpack/test/template/render_test.rb
@@ -319,10 +319,11 @@ class LazyViewRenderTest < ActiveSupport::TestCase
     end
 
     def with_external_encoding(encoding)
-      old, Encoding.default_external = Encoding.default_external, encoding
+      old = Encoding.default_external
+      silence_warnings { Encoding.default_external = encoding }
       yield
     ensure
-      Encoding.default_external = old
+      silence_warnings { Encoding.default_external = old }
     end
   end
 end