diff --git a/test/serialization_test_properties.cpp b/test/serialization_test_properties.cpp
index 8c92024..270f8bc 100644
--- a/test/serialization_test_properties.cpp
+++ b/test/serialization_test_properties.cpp
@@ -38,6 +38,7 @@
     EXPECT_EQ(input->associations(), output->associations());
     EXPECT_EQ(input->version(), output->version());
     EXPECT_EQ(input->purpose(), output->purpose());
+    EXPECT_EQ(input->updateTimestamp(), output->updateTimestamp());
 }
 
 } // namespace test