1 files changed, 8 insertions, 0 deletions
diff --git a/actionpack/test/dispatch/request_test.rb b/actionpack/test/dispatch/request_test.rb
index df47520850..40e32cb4d3 100644
--- a/actionpack/test/dispatch/request_test.rb
+++ b/actionpack/test/dispatch/request_test.rb
@@ -852,6 +852,14 @@ class RequestTest < ActiveSupport::TestCase
 
     request.variant = [:phone, :tablet]
     assert_equal [:phone, :tablet], request.variant
+
+    assert_raise ArgumentError do
+      request.variant = [:phone, "tablet"]
+    end
+
+    assert_raise ArgumentError do
+      request.variant = "yolo"
+    end
   end
 
   test "setting variant with non symbol value" do