diff --git a/actionpack/lib/action_controller/assertions/response_assertions.rb b/actionpack/lib/action_controller/assertions/response_assertions.rb
index 5976090273..43e83ac017 100644
--- a/actionpack/lib/action_controller/assertions/response_assertions.rb
+++ b/actionpack/lib/action_controller/assertions/response_assertions.rb
@@ -63,7 +63,10 @@ module ActionController
 
           # Support partial arguments for hash redirections
           if options.is_a?(Hash) && @response.redirected_to.is_a?(Hash)
-            return true if options.all? {|(key, value)| @response.redirected_to[key] == value}
+            if options.all? {|(key, value)| @response.redirected_to[key] == value}
+              ::ActiveSupport::Deprecation.warn("Using assert_redirected_to with partial hash arguments is deprecated. Specify the full set arguments instead", caller)
+              return true
+            end
           end
 
           redirected_to_after_normalisation = normalize_argument_to_redirection(@response.redirected_to)
diff --git a/actionpack/test/controller/redirect_test.rb b/actionpack/test/controller/redirect_test.rb
index 91e21db854..c457486913 100644
--- a/actionpack/test/controller/redirect_test.rb
+++ b/actionpack/test/controller/redirect_test.rb
@@ -235,7 +235,10 @@ class RedirectTest < ActionController::TestCase
 
   def test_redirect_with_partial_params
     get :module_redirect
-    assert_redirected_to :action => 'hello_world'
+
+    assert_deprecated do
+      assert_redirected_to :action => 'hello_world'
+    end
   end
 
   def test_redirect_to_nil