diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 91d3e0be..dc757dfb 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -203,6 +203,8 @@ add_test_case(mqtt5_operation_publish_validation_failure_response_topic_too_long
 add_test_case(mqtt5_operation_publish_validation_failure_invalid_response_topic)
 add_test_case(mqtt5_operation_publish_validation_failure_invalid_utf8_response_topic)
 add_test_case(mqtt5_operation_publish_validation_failure_correlation_data_too_long)
+add_test_case(mqtt5_operation_publish_validation_failure_content_type_too_long)
+add_test_case(mqtt5_operation_publish_validation_failure_invalid_utf8_content_type)
 add_test_case(mqtt5_operation_publish_validation_failure_subscription_identifier_exists)
 add_test_case(mqtt5_operation_publish_validation_failure_topic_alias_zero)
 add_test_case(mqtt5_operation_publish_validation_failure_user_properties_name_too_long)