diff --git a/actionpack/lib/action_dispatch/http/request.rb b/actionpack/lib/action_dispatch/http/request.rb
index ea688e10bfeda..a3c6f015d9083 100644
--- a/actionpack/lib/action_dispatch/http/request.rb
+++ b/actionpack/lib/action_dispatch/http/request.rb
@@ -334,7 +334,7 @@ def GET
 
     # Override Rack's POST method to support indifferent access
     def POST
-      get_header("action_dispatch.request.request_parameters") do |k|
+      get_header("action_dispatch.request.request_parameters") do
         self.request_parameters = normalize_encode_params(super || {})
       end
     rescue Rack::Utils::ParameterTypeError, Rack::Utils::InvalidParameterError => e
diff --git a/actionpack/test/dispatch/callbacks_test.rb b/actionpack/test/dispatch/callbacks_test.rb
index f767b07e7593f..5ba76d9ab9da5 100644
--- a/actionpack/test/dispatch/callbacks_test.rb
+++ b/actionpack/test/dispatch/callbacks_test.rb
@@ -28,7 +28,7 @@ def test_before_and_after_callbacks
     assert_equal 4, Foo.a
     assert_equal 4, Foo.b
 
-    dispatch do |env|
+    dispatch do
       raise "error"
     end rescue nil
     assert_equal 6, Foo.a