diff --git a/test/serialization_test_properties.cpp b/test/serialization_test_properties.cpp
index 2c83f1e..d7d5455 100644
--- a/test/serialization_test_properties.cpp
+++ b/test/serialization_test_properties.cpp
@@ -36,6 +36,7 @@
     EXPECT_EQ(input->timestamp(), output->timestamp());
     EXPECT_EQ(input->message(), output->message());
     EXPECT_EQ(input->additionalData(), output->additionalData());
+    EXPECT_EQ(input->additionalData2(), output->additionalData2());
     EXPECT_EQ(input->resolved(), output->resolved());
     EXPECT_EQ(input->associations(), output->associations());
     EXPECT_EQ(input->version(), output->version());