diff --git a/fluent-package/apt/systemd-test/update-to-next-version.sh b/fluent-package/apt/systemd-test/update-to-next-version.sh
index c48e5b5dd..d80c2f67e 100755
--- a/fluent-package/apt/systemd-test/update-to-next-version.sh
+++ b/fluent-package/apt/systemd-test/update-to-next-version.sh
@@ -43,6 +43,7 @@ test $(eval $env_vars && echo $FLUENT_PACKAGE_LOG_FILE) = "/var/log/fluent/fluen
 test $(eval $env_vars && echo $FLUENT_PLUGIN) = "/etc/fluent/plugin"
 test $(eval $env_vars && echo $FLUENT_SOCKET) = "/var/run/fluent/fluentd.sock"
 # FLUENT_PACKAGE_VERSION will be updated after the next restart
+# TODO: consider how to test the update of version info
 (! test $(eval $env_vars && echo $FLUENT_PACKAGE_VERSION) = "$next_package_ver")
 
 # Test: fluent-diagtool
diff --git a/fluent-package/yum/systemd-test/update-to-next-version.sh b/fluent-package/yum/systemd-test/update-to-next-version.sh
index ce2203676..17e3b432d 100755
--- a/fluent-package/yum/systemd-test/update-to-next-version.sh
+++ b/fluent-package/yum/systemd-test/update-to-next-version.sh
@@ -66,6 +66,7 @@ test $(eval $env_vars && echo $FLUENT_PACKAGE_LOG_FILE) = "/var/log/fluent/fluen
 test $(eval $env_vars && echo $FLUENT_PLUGIN) = "/etc/fluent/plugin"
 test $(eval $env_vars && echo $FLUENT_SOCKET) = "/var/run/fluent/fluentd.sock"
 # FLUENT_PACKAGE_VERSION will be updated after the next restart
+# TODO: consider how to test the update of version info
 (! test $(eval $env_vars && echo $FLUENT_PACKAGE_VERSION) = "$next_package_ver")
 
 # Test: logs