1 files changed, 8 insertions, 1 deletions
diff --git a/activejob/test/cases/argument_serialization_test.rb b/activejob/test/cases/argument_serialization_test.rb
index 8b9b62190f..eb8ad185aa 100644
--- a/activejob/test/cases/argument_serialization_test.rb
+++ b/activejob/test/cases/argument_serialization_test.rb
@@ -10,7 +10,7 @@ class ArgumentSerializationTest < ActiveSupport::TestCase
   end
 
   [ nil, 1, 1.0, 1_000_000_000_000_000_000_000,
-    'a', true, false,
+    'a', true, false, BigDecimal.new(5),
     [ 1, 'a' ],
     { 'a' => 1 }
   ].each do |arg|
@@ -88,6 +88,13 @@ class ArgumentSerializationTest < ActiveSupport::TestCase
     assert_equal "Job with argument: 2", JobBuffer.last_value
   end
 
+  test 'raises a friendly SerializationError for records without ids' do
+    err = assert_raises ActiveJob::SerializationError do
+      ActiveJob::Arguments.serialize [Person.new(nil)]
+    end
+    assert_match 'Unable to serialize Person without an id.', err.message
+  end
+
   private
     def assert_arguments_unchanged(*args)
       assert_arguments_roundtrip args