diff --git a/fluent-package/apt/systemd-test/test.sh b/fluent-package/apt/systemd-test/test.sh
index d49d7f8cc..486b7255e 100755
--- a/fluent-package/apt/systemd-test/test.sh
+++ b/fluent-package/apt/systemd-test/test.sh
@@ -21,6 +21,7 @@ set -eu
 test_filenames=(
     install-newly.sh
     update-from-v4.sh
+    update-from-v4-with-old-service-file.sh
     update-to-next-version.sh
 )
 
diff --git a/fluent-package/apt/systemd-test/update-from-v4-with-old-service-file.sh b/fluent-package/apt/systemd-test/update-from-v4-with-old-service-file.sh
new file mode 100755
index 000000000..eedd243fa
--- /dev/null
+++ b/fluent-package/apt/systemd-test/update-from-v4-with-old-service-file.sh
@@ -0,0 +1,111 @@
+#!/bin/bash
+
+set -exu
+
+. $(dirname $0)/../commonvar.sh
+
+# TODO: Remove it when v5 repository was deployed
+sudo apt install -y curl ca-certificates
+curl -O https://packages.treasuredata.com/4/${distribution}/${code_name}/pool/contrib/f/fluentd-apt-source/fluentd-apt-source_2020.8.25-1_all.deb
+sudo apt install -y ./fluentd-apt-source_2020.8.25-1_all.deb
+
+# Install v4
+sudo apt clean all
+# Uncomment when v5 repository was deployed
+#apt_source_package=/vagrant/${distribution}/pool/${code_name}/${channel}/*/*/fluent-apt-source*_all.deb
+#sudo apt install -V -y ${apt_source_package} ca-certificates
+sudo apt update
+sudo apt install -V -y td-agent=4.5.0-1
+
+systemctl status --no-pager td-agent
+
+# Set custom service as "td-agent-server"
+sleep 3
+sudo systemctl stop td-agent
+sudo cp /lib/systemd/system/td-agent.service /etc/systemd/system/td-agent-server.service
+sudo cp /etc/logrotate.d/td-agent /etc/logrotate.d/td-agent-server
+sudo cp /etc/td-agent/td-agent.conf /etc/td-agent/td-agent-server.conf
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/etc/td-agent/td-agent.conf,/etc/td-agent/td-agent-server.conf,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/var/run/td-agent/td-agent.sock,/var/run/td-agent-server/td-agent-server.sock,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/var/log/td-agent/td-agent.log,/var/log/td-agent/td-agent-server.log,g'
+sudo sed -i /etc/logrotate.d/td-agent-server -e 's,/var/log/td-agent/td-agent.log,/var/log/td-agent/td-agent-server.log,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/etc/default/td-agent,/etc/default/td-agent-server,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/var/run/td-agent/td-agent.pid,/var/run/td-agent-server/td-agent-server.pid,g'
+sudo sed -i /etc/logrotate.d/td-agent-server -e 's,/var/run/td-agent/td-agent.pid,/var/run/td-agent-server/td-agent-server.pid,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,RuntimeDirectory=td-agent,RuntimeDirectory=td-agent-server,g'
+sudo systemctl daemon-reload
+sudo systemctl enable --now td-agent-server
+
+# Install the current
+sleep 3
+sudo systemctl stop td-agent-server
+sudo apt install -V -y \
+    /vagrant/${distribution}/pool/${code_name}/${channel}/*/*/fluent-package_*_${architecture}.deb
+
+# Manual migration
+sleep 3
+sudo systemctl stop td-agent
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/opt/td-agent/lib/libjemalloc.so,/opt/fluent/lib/libjemalloc.so,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/opt/td-agent/lib/ruby/gems/2.7.0/,/opt/fluent/lib/ruby/gems/3.2.0/,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/opt/td-agent/lib/ruby/gems/2.7.0/,/opt/fluent/lib/ruby/gems/3.2.0/,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/opt/td-agent/bin/fluentd,/opt/fluent/bin/fluentd,g'
+echo "Alias=fluentd.service" | sudo tee -a /etc/systemd/system/td-agent-server.service
+
+sudo systemctl daemon-reload
+sudo systemctl enable --now td-agent-server
+
+# Somehow, we need to restart the service to apply "/etc/systemd/system/td-agent-server.service"
+systemctl status --no-pager td-agent-server
+sudo systemctl restart td-agent-server
+
+# Test: service status
+systemctl status --no-pager td-agent-server
+systemctl status --no-pager fluentd
+
+# Test: config migration
+test -L /etc/td-agent
+test -e /etc/td-agent/td-agent-server.conf
+
+# Test: log file migration
+test -L /var/log/td-agent
+test -e /var/log/td-agent/td-agent-server.log
+
+# Test: bin file migration
+test -h /usr/sbin/td-agent
+test -h /usr/sbin/td-agent-gem
+
+# Test: environmental variables
+pid=$(systemctl show fluentd --property=MainPID --value)
+env_vars=$(sudo sed -e 's/\x0/\n/g' /proc/$pid/environ)
+test $(eval $env_vars && echo $HOME) = "/var/lib/td-agent"
+test $(eval $env_vars && echo $LOGNAME) = "td-agent"
+test $(eval $env_vars && echo $USER) = "td-agent"
+test $(eval $env_vars && echo $FLUENT_CONF) = "/etc/td-agent/td-agent-server.conf"
+test $(eval $env_vars && echo $TD_AGENT_LOG_FILE) = "/var/log/td-agent/td-agent-server.log"
+test $(eval $env_vars && echo $FLUENT_PLUGIN) = "/etc/td-agent/plugin"
+test $(eval $env_vars && echo $FLUENT_SOCKET) = "/var/run/td-agent-server/td-agent-server.sock"
+
+# Test: No error logs
+# (v4 default config outputs 'warn' log, so we should check only 'error' and 'fatal' logs)
+sleep 3
+(! grep -e '\[error\]' -e '\[fatal\]' /var/log/td-agent/td-agent-server.log)
+
+# Test: logrotate config migration
+test -e /etc/logrotate.d/td-agent-server
+test -e /var/log/fluent/td-agent-server.log
+
+sudo logrotate -f /etc/logrotate.d/td-agent-server
+sleep 1
+
+test -e /var/log/fluent/td-agent-server.log.1
+sudo cp /var/log/fluent/td-agent-server.log.1 saved_rotated_logfile
+
+sudo systemctl stop td-agent-server
+# Check that SIGUSR1 is sent to Fluentd and Fluentd reopens the logfile
+# not to log to the rotated old file.
+sudo diff --report-identical-files /var/log/fluent/td-agent-server.log.1 saved_rotated_logfile
+
+# Uninstall
+sudo apt remove -y fluent-package
+(! systemctl status --no-pager td-agent-server)
+(! systemctl status --no-pager fluentd)
diff --git a/fluent-package/apt/systemd-test/update-from-v4.sh b/fluent-package/apt/systemd-test/update-from-v4.sh
index 122b950ac..a3924c2a8 100755
--- a/fluent-package/apt/systemd-test/update-from-v4.sh
+++ b/fluent-package/apt/systemd-test/update-from-v4.sh
@@ -53,30 +53,14 @@ env_vars=$(sudo sed -e 's/\x0/\n/g' /proc/$pid/environ)
 test $(eval $env_vars && echo $HOME) = "/var/lib/fluent"
 test $(eval $env_vars && echo $LOGNAME) = "_fluentd"
 test $(eval $env_vars && echo $USER) = "_fluentd"
-test $(eval $env_vars && echo $FLUENT_CONF) = "/etc/fluent/td-agent.conf"
-test $(eval $env_vars && echo $FLUENT_PACKAGE_LOG_FILE) = "/var/log/fluent/td-agent.log"
+test $(eval $env_vars && echo $FLUENT_CONF) = "/etc/fluent/fluentd.conf"
+test $(eval $env_vars && echo $FLUENT_PACKAGE_LOG_FILE) = "/var/log/fluent/fluentd.log"
 test $(eval $env_vars && echo $FLUENT_PLUGIN) = "/etc/fluent/plugin"
 test $(eval $env_vars && echo $FLUENT_SOCKET) = "/var/run/fluent/fluentd.sock"
 
 # Test: No error logs
-# (v4 default config outputs 'warn' log, so we should check only 'error' and 'fatal' logs)
 sleep 3
-(! grep -q -e '\[error\]' -e '\[fatal\]' /var/log/td-agent/td-agent.log)
-
-# Test: logrotate config migration
-test -e /etc/logrotate.d/td-agent
-test -e /var/log/fluent/td-agent.log
-
-sudo logrotate -f /etc/logrotate.d/td-agent
-sleep 1
-
-test -e /var/log/fluent/td-agent.log.1
-sudo cp /var/log/fluent/td-agent.log.1 saved_rotated_logfile
-
-sudo systemctl stop td-agent
-# Check that SIGUSR1 is sent to Fluentd and Fluentd reopens the logfile
-# not to log to the rotated old file.
-sudo diff --report-identical-files /var/log/fluent/td-agent.log.1 saved_rotated_logfile
+(! grep -e '\[warn\]' -e '\[error\]' -e '\[fatal\]' /var/log/fluent/fluentd.log)
 
 # Uninstall
 sudo apt remove -y fluent-package
diff --git a/fluent-package/templates/etc/systemd/fluentd.erb b/fluent-package/templates/etc/systemd/fluentd.erb
index 22df6aa9b..1a0436121 100644
--- a/fluent-package/templates/etc/systemd/fluentd.erb
+++ b/fluent-package/templates/etc/systemd/fluentd.erb
@@ -1,5 +1 @@
 FLUENT_PACKAGE_OPTIONS=""
-# The following environment variable will be modified via package maintainer's migration script
-FLUENT_CONF=/etc/<%= package_dir %>/<%= service_name %>.conf
-FLUENT_PLUGIN=/etc/<%= package_dir %>/plugin
-FLUENT_PACKAGE_LOG_FILE=/var/log/<%= package_dir %>/<%= service_name %>.log
diff --git a/fluent-package/templates/package-scripts/fluent-package/deb/postinst b/fluent-package/templates/package-scripts/fluent-package/deb/postinst
index 3a44fc0ee..e24980c11 100755
--- a/fluent-package/templates/package-scripts/fluent-package/deb/postinst
+++ b/fluent-package/templates/package-scripts/fluent-package/deb/postinst
@@ -69,8 +69,6 @@ migration_from_v4_main_process() {
         if [ -f /etc/<%= compat_package_dir %>/<%= compat_service_name %>.conf ]; then
             echo "Migrating from /etc/<%= compat_package_dir %>/<%= compat_service_name %>.conf to /etc/<%= package_dir %>/<%= compat_service_name %>.conf"
             cp -f /etc/<%= compat_package_dir %>/<%= compat_service_name %>.conf /etc/<%= package_dir %>/<%= compat_service_name %>.conf
-            echo "Refer previous configuration <%= compat_service_name %>.conf ..."
-            sed -i"" /etc/default/<%= service_name %> -e "/FLUENT_CONF/c FLUENT_CONF=/etc/<%= package_dir %>/<%= compat_service_name %>.conf"
             for d in $(ls /etc/<%= compat_package_dir %>); do
                 if [ ! "$d" = "plugin" -a ! "$d" = "<%= compat_service_name %>.conf" ]; then
                     # except managed under deb files must be migrated
@@ -103,14 +101,6 @@ migration_from_v4_main_process() {
                 mv -f /var/log/<%= compat_package_dir %>/$d /var/log/<%= package_dir %>/
             fi
         done
-        if [ -f /var/log/<%= package_dir %>/<%= compat_service_name %>.log ]; then
-            echo "Keep logging to <%= compat_service_name %>.log ..."
-            sed -i"" /etc/default/<%= service_name %> -e "/FLUENT_PACKAGE_LOG_FILE/c FLUENT_PACKAGE_LOG_FILE=/var/log/<%= package_dir %>/<%= compat_service_name %>.log"
-        fi
-        if [ -f /etc/logrotate.d/<%= compat_service_name %> ]; then
-            echo "Migrating path of pid ..."
-            sed -i"" /etc/logrotate.d/<%= compat_service_name %> -e "s,/var/run/<%= compat_package_dir %>/<%= compat_service_name %>.pid,/var/run/<%= package_dir %>/<%= service_name %>.pid,"
-        fi
     fi
 }
 
diff --git a/fluent-package/yum/fluent-package.spec.in b/fluent-package/yum/fluent-package.spec.in
index 0b64543ba..13d7e1c90 100644
--- a/fluent-package/yum/fluent-package.spec.in
+++ b/fluent-package/yum/fluent-package.spec.in
@@ -199,8 +199,6 @@ if [ $1 -eq 1 ]; then
           mv -f $d /etc/@PACKAGE_DIR@/
         fi
       done
-      echo "Refer previous configuration @COMPAT_SERVICE_NAME@.conf ..."
-      %{__sed} -i"" %{_sysconfdir}/sysconfig/@SERVICE_NAME@ -e "/FLUENT_CONF/c FLUENT_CONF=/etc/@PACKAGE_DIR@/@COMPAT_SERVICE_NAME@.conf"
     fi
   fi
   if systemctl is-active @COMPAT_SERVICE_NAME@; then
@@ -233,8 +231,6 @@ if [ $1 -eq 1 ]; then
       fi
     done
     if [ -f /var/log/@PACKAGE_DIR@/@COMPAT_SERVICE_NAME@.log ]; then
-      echo "Keep logging to @COMPAT_SERVICE_NAME@.log ..."
-      %{__sed} -i"" %{_sysconfdir}/sysconfig/@SERVICE_NAME@ -e "/FLUENT_PACKAGE_LOG_FILE/c FLUENT_PACKAGE_LOG_FILE=/var/log/@PACKAGE_DIR@/@COMPAT_SERVICE_NAME@.log"
       # Backup the config since RPM removes the file if it is not edited.
       if [ -f /etc/logrotate.d/@COMPAT_SERVICE_NAME@ ]; then
         cp /etc/logrotate.d/@COMPAT_SERVICE_NAME@ %{v4migration_old_rotate_config_saved}
@@ -327,10 +323,6 @@ if [ -f %{v4migration} ]; then
     echo "Restores logrotate config from backup"
     mv -f %{v4migration_old_rotate_config_saved} /etc/logrotate.d/@COMPAT_SERVICE_NAME@
   fi
-  if [ -f /etc/logrotate.d/@COMPAT_SERVICE_NAME@ ]; then
-    echo "Migrating path of pid in the logrotate config /etc/logrotate.d/@COMPAT_SERVICE_NAME@ ..."
-    %{__sed} -i"" /etc/logrotate.d/@COMPAT_SERVICE_NAME@ -e "s,/var/run/@COMPAT_PACKAGE_DIR@/@COMPAT_SERVICE_NAME@.pid,/var/run/@PACKAGE_DIR@/@SERVICE_NAME@.pid,"
-  fi
   rm -f %{v4migration}
   if [ -f %{v4migration_with_restart} ]; then
     # When upgrading from v4, td-agent.service will be removed
diff --git a/fluent-package/yum/systemd-test/test.sh b/fluent-package/yum/systemd-test/test.sh
index 9c2181d5b..8f5d24e43 100755
--- a/fluent-package/yum/systemd-test/test.sh
+++ b/fluent-package/yum/systemd-test/test.sh
@@ -21,8 +21,8 @@ set -eu
 test_filenames=(
     install-newly.sh
     update-from-v4.sh
+    update-from-v4-with-old-service-file.sh
     update-to-next-version.sh
-    update-from-v4-logrotation-config-edited.sh
 )
 
 for test_filename in ${test_filenames[@]}; do
diff --git a/fluent-package/yum/systemd-test/update-from-v4-logrotation-config-edited.sh b/fluent-package/yum/systemd-test/update-from-v4-logrotation-config-edited.sh
deleted file mode 100755
index 80212aca4..000000000
--- a/fluent-package/yum/systemd-test/update-from-v4-logrotation-config-edited.sh
+++ /dev/null
@@ -1,61 +0,0 @@
-#!/bin/bash
-
-set -exu
-
-. $(dirname $0)/commonvar.sh
-
-# Install v4
-sudo rpm --import https://packages.treasuredata.com/GPG-KEY-td-agent
-case ${distribution} in
-    amazon)
-        cat > td.repo <<'EOF';
-[treasuredata]
-name=TreasureData
-baseurl=https://packages.treasuredata.com/4/amazon/$releasever/$basearch
-gpgcheck=1
-gpgkey=https://packages.treasuredata.com/GPG-KEY-td-agent
-EOF
-        sudo mv td.repo /etc/yum.repos.d/
-        ;;
-    *)
-        cat > td.repo <<'EOF';
-[treasuredata]
-name=TreasureData
-baseurl=https://packages.treasuredata.com/4/redhat/$releasever/$basearch
-gpgcheck=1
-gpgkey=https://packages.treasuredata.com/GPG-KEY-td-agent
-EOF
-        sudo mv td.repo /etc/yum.repos.d/
-        ;;
-esac
-sudo $DNF update -y
-sudo $DNF install -y td-agent-4.5.0-1.*.x86_64
-sudo systemctl enable --now td-agent
-systemctl status --no-pager td-agent
-
-# Edit the logrotate config
-test -e /etc/logrotate.d/td-agent
-sudo sed -i"" /etc/logrotate.d/td-agent -e "s/rotate 30/rotate 40/g"
-
-# Install the current
-sudo $DNF install -y \
-    /vagrant/${distribution}/${DISTRIBUTION_VERSION}/x86_64/Packages/fluent-package-[0-9]*.rpm
-systemctl status --no-pager fluentd
-
-# Test: logrotate config migration
-#   RPM renames '/etc/logrotate.d/td-agent' to '/etc/logrotate.d/td-agent.rpmsave'.
-#   Migration process restores '/etc/logrotate.d/td-agent' from the rpmsave and update the pid file path.
-test -e /etc/logrotate.d/td-agent
-test -e /var/log/fluent/td-agent.log
-
-sudo $DNF install -y logrotate # rockylinux-8 needs to install logrotate
-sleep 1
-sudo logrotate -f /etc/logrotate.d/td-agent
-sleep 1
-
-test -e /var/log/fluent/td-agent.log.1
-sudo cp /var/log/fluent/td-agent.log.1 saved_rotated_logfile
-sudo systemctl stop fluentd
-# Check that SIGUSR1 is sent to Fluentd and Fluentd reopens the logfile
-# not to log to the rotated old file.
-sudo diff --report-identical-files /var/log/fluent/td-agent.log.1 saved_rotated_logfile
diff --git a/fluent-package/yum/systemd-test/update-from-v4-with-old-service-file.sh b/fluent-package/yum/systemd-test/update-from-v4-with-old-service-file.sh
new file mode 100755
index 000000000..0a9ad15a6
--- /dev/null
+++ b/fluent-package/yum/systemd-test/update-from-v4-with-old-service-file.sh
@@ -0,0 +1,114 @@
+#!/bin/bash
+
+set -exu
+
+. $(dirname $0)/commonvar.sh
+
+# Install v4
+sudo rpm --import https://packages.treasuredata.com/GPG-KEY-td-agent
+case ${distribution} in
+    amazon)
+        cat > td.repo <<'EOF';
+[treasuredata]
+name=TreasureData
+baseurl=https://packages.treasuredata.com/4/amazon/$releasever/$basearch
+gpgcheck=1
+gpgkey=https://packages.treasuredata.com/GPG-KEY-td-agent
+EOF
+        sudo mv td.repo /etc/yum.repos.d/
+        ;;
+    *)
+        cat > td.repo <<'EOF';
+[treasuredata]
+name=TreasureData
+baseurl=https://packages.treasuredata.com/4/redhat/$releasever/$basearch
+gpgcheck=1
+gpgkey=https://packages.treasuredata.com/GPG-KEY-td-agent
+EOF
+        sudo mv td.repo /etc/yum.repos.d/
+        ;;
+esac
+sudo $DNF update -y
+sudo $DNF install -y td-agent-4.5.0-1.*.x86_64
+
+# Set custom service as "td-agent-server"
+sudo cp /usr/lib/systemd/system/td-agent.service /etc/systemd/system/td-agent-server.service
+sudo cp /etc/logrotate.d/td-agent /etc/logrotate.d/td-agent-server
+sudo cp /etc/td-agent/td-agent.conf /etc/td-agent/td-agent-server.conf
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/etc/td-agent/td-agent.conf,/etc/td-agent/td-agent-server.conf,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/var/run/td-agent/td-agent.sock,/var/run/td-agent-server/td-agent-server.sock,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/var/log/td-agent/td-agent.log,/var/log/td-agent/td-agent-server.log,g'
+sudo sed -i /etc/logrotate.d/td-agent-server -e 's,/var/log/td-agent/td-agent.log,/var/log/td-agent/td-agent-server.log,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/etc/default/td-agent,/etc/default/td-agent-server,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/var/run/td-agent/td-agent.pid,/var/run/td-agent-server/td-agent-server.pid,g'
+sudo sed -i /etc/logrotate.d/td-agent-server -e 's,/var/run/td-agent/td-agent.pid,/var/run/td-agent-server/td-agent-server.pid,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,RuntimeDirectory=td-agent,RuntimeDirectory=td-agent-server,g'
+sudo systemctl daemon-reload
+sudo systemctl enable --now td-agent-server
+
+# Install the current
+sudo $DNF install -y \
+    /vagrant/${distribution}/${DISTRIBUTION_VERSION}/x86_64/Packages/fluent-package-[0-9]*.rpm
+
+# Manual migration
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/opt/td-agent/lib/libjemalloc.so,/opt/fluent/lib/libjemalloc.so,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/opt/td-agent/lib/ruby/gems/2.7.0/,/opt/fluent/lib/ruby/gems/3.2.0/,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/opt/td-agent/lib/ruby/gems/2.7.0/,/opt/fluent/lib/ruby/gems/3.2.0/,g'
+sudo sed -i /etc/systemd/system/td-agent-server.service -e 's,/opt/td-agent/bin/fluentd,/opt/fluent/bin/fluentd,g'
+echo "Alias=fluentd.service" | sudo tee -a /etc/systemd/system/td-agent-server.service
+
+sudo systemctl daemon-reload
+sudo systemctl enable --now td-agent-server
+
+# Test: service status
+systemctl status --no-pager td-agent-server
+systemctl status --no-pager fluentd
+
+# Test: config migration
+test -L /etc/td-agent
+test -e /etc/td-agent/td-agent-server.conf
+
+# Test: log file migration
+test -L /var/log/td-agent
+test -e /var/log/td-agent/td-agent-server.log
+
+# Test: bin file migration
+test -h /usr/sbin/td-agent
+test -h /usr/sbin/td-agent-gem
+
+# Test: environmental variables
+pid=$(eval $(systemctl show fluentd --property=MainPID) && echo $MainPID)
+env_vars=$(sudo sed -e 's/\x0/\n/g' /proc/$pid/environ)
+test $(eval $env_vars && echo $HOME) = "/var/lib/td-agent"
+test $(eval $env_vars && echo $LOGNAME) = "td-agent"
+test $(eval $env_vars && echo $USER) = "td-agent"
+test $(eval $env_vars && echo $FLUENT_CONF) = "/etc/td-agent/td-agent-server.conf"
+test $(eval $env_vars && echo $TD_AGENT_LOG_FILE) = "/var/log/td-agent/td-agent-server.log"
+test $(eval $env_vars && echo $FLUENT_PLUGIN) = "/etc/td-agent/plugin"
+test $(eval $env_vars && echo $FLUENT_SOCKET) = "/var/run/td-agent-server/td-agent-server.sock"
+
+# Test: No error logs
+# (v4 default config outputs 'warn' log, so we should check only 'error' and 'fatal' logs)
+sleep 3
+(! grep -e '\[error\]' -e '\[fatal\]' /var/log/td-agent/td-agent-server.log)
+
+# Test: logrotate config migration
+test -e /etc/logrotate.d/td-agent-server
+test -e /var/log/fluent/td-agent-server.log
+
+sudo $DNF install -y logrotate # rockylinux-8 needs to install logrotate
+sudo logrotate -f /etc/logrotate.d/td-agent-server
+sleep 1
+
+test -e /var/log/fluent/td-agent-server.log.1
+sudo cp /var/log/fluent/td-agent-server.log.1 saved_rotated_logfile
+
+sudo systemctl stop td-agent-server
+# Check that SIGUSR1 is sent to Fluentd and Fluentd reopens the logfile
+# not to log to the rotated old file.
+sudo diff --report-identical-files /var/log/fluent/td-agent-server.log.1 saved_rotated_logfile
+
+# Uninstall
+sudo $DNF remove -y fluent-package
+(! systemctl status --no-pager td-agent-server)
+(! systemctl status --no-pager fluentd)
diff --git a/fluent-package/yum/systemd-test/update-from-v4.sh b/fluent-package/yum/systemd-test/update-from-v4.sh
index 51b1d0213..188440ce4 100755
--- a/fluent-package/yum/systemd-test/update-from-v4.sh
+++ b/fluent-package/yum/systemd-test/update-from-v4.sh
@@ -61,30 +61,14 @@ env_vars=$(sudo sed -e 's/\x0/\n/g' /proc/$pid/environ)
 test $(eval $env_vars && echo $HOME) = "/var/lib/fluent"
 test $(eval $env_vars && echo $LOGNAME) = "fluentd"
 test $(eval $env_vars && echo $USER) = "fluentd"
-test $(eval $env_vars && echo $FLUENT_CONF) = "/etc/fluent/td-agent.conf"
-test $(eval $env_vars && echo $FLUENT_PACKAGE_LOG_FILE) = "/var/log/fluent/td-agent.log"
+test $(eval $env_vars && echo $FLUENT_CONF) = "/etc/fluent/fluentd.conf"
+test $(eval $env_vars && echo $FLUENT_PACKAGE_LOG_FILE) = "/var/log/fluent/fluentd.log"
 test $(eval $env_vars && echo $FLUENT_PLUGIN) = "/etc/fluent/plugin"
 test $(eval $env_vars && echo $FLUENT_SOCKET) = "/var/run/fluent/fluentd.sock"
 
 # Test: No error logs
-# (v4 default config outputs 'warn' log, so we should check only 'error' and 'fatal' logs)
 sleep 3
-(! grep -q -e '\[error\]' -e '\[fatal\]' /var/log/td-agent/td-agent.log)
-
-# Test: logrotate config migration
-test -e /etc/logrotate.d/td-agent
-test -e /var/log/fluent/td-agent.log
-
-sudo $DNF install -y logrotate # rockylinux-8 needs to install logrotate
-sudo logrotate -f /etc/logrotate.d/td-agent
-sleep 1
-
-test -e /var/log/fluent/td-agent.log.1
-sudo cp /var/log/fluent/td-agent.log.1 saved_rotated_logfile
-sudo systemctl stop td-agent
-# Check that SIGUSR1 is sent to Fluentd and Fluentd reopens the logfile
-# not to log to the rotated old file.
-sudo diff --report-identical-files /var/log/fluent/td-agent.log.1 saved_rotated_logfile
+(! grep -e '\[warn\]' -e '\[error\]' -e '\[fatal\]' /var/log/fluent/fluentd.log)
 
 # Uninstall
 sudo $DNF remove -y fluent-package