diff --git a/tests/pre-commit-hooks/prettier-package-xml/normal/package.xml b/tests/pre-commit-hooks/prettier-package-xml/normal/package.xml
index da42506..31cfaf3 100644
--- a/tests/pre-commit-hooks/prettier-package-xml/normal/package.xml
+++ b/tests/pre-commit-hooks/prettier-package-xml/normal/package.xml
@@ -4,7 +4,7 @@
   <name>rospkg</name>
   <version>0.0.0</version>
   <description>The dummy package to test sort_package_xml</description>
-  <maintainer email="isamu.takagi@tier4.jp">Takagi, Isamu</maintainer>
+  <maintainer email="foo.bar@example.com">Foo Bar</maintainer>
   <license>Apache License 2.0</license>
 
   <buildtool_depend>ament_cmake</buildtool_depend>
diff --git a/tests/pre-commit-hooks/sort-package-xml/normal/package.xml b/tests/pre-commit-hooks/sort-package-xml/normal/package.xml
index da42506..31cfaf3 100644
--- a/tests/pre-commit-hooks/sort-package-xml/normal/package.xml
+++ b/tests/pre-commit-hooks/sort-package-xml/normal/package.xml
@@ -4,7 +4,7 @@
   <name>rospkg</name>
   <version>0.0.0</version>
   <description>The dummy package to test sort_package_xml</description>
-  <maintainer email="isamu.takagi@tier4.jp">Takagi, Isamu</maintainer>
+  <maintainer email="foo.bar@example.com">Foo Bar</maintainer>
   <license>Apache License 2.0</license>
 
   <buildtool_depend>ament_cmake</buildtool_depend>
diff --git a/tests/test_sort_package_xml/no-format.answer.xml b/tests/test_sort_package_xml/no-format.answer.xml
index adc681e..6430650 100644
--- a/tests/test_sort_package_xml/no-format.answer.xml
+++ b/tests/test_sort_package_xml/no-format.answer.xml
@@ -4,7 +4,7 @@
   <name>rospkg</name>
   <version>0.0.0</version>
   <description>The dummy package to test pre-commit hooks</description>
-  <maintainer email="isamu.takagi@tier4.jp">Takagi, Isamu</maintainer>
+  <maintainer email="foo.bar@example.com">Foo Bar</maintainer>
   <license>Apache License 2.0</license>
 
   <buildtool_depend>ament_cmake</buildtool_depend>
diff --git a/tests/test_sort_package_xml/no-format.input.xml b/tests/test_sort_package_xml/no-format.input.xml
index 5742d8b..4b42120 100644
--- a/tests/test_sort_package_xml/no-format.input.xml
+++ b/tests/test_sort_package_xml/no-format.input.xml
@@ -4,7 +4,7 @@
   <name>rospkg</name>
   <version>0.0.0</version>
   <description>The dummy package to test pre-commit hooks</description>
-  <maintainer email="isamu.takagi@tier4.jp">Takagi, Isamu</maintainer>
+  <maintainer email="foo.bar@example.com">Foo Bar</maintainer>
   <license>Apache License 2.0</license>
 
   <buildtool_depend>ament_cmake</buildtool_depend>
diff --git a/tests/test_sort_package_xml/normal.answer.xml b/tests/test_sort_package_xml/normal.answer.xml
index ba75281..30e7b0b 100644
--- a/tests/test_sort_package_xml/normal.answer.xml
+++ b/tests/test_sort_package_xml/normal.answer.xml
@@ -4,7 +4,7 @@
   <name>rospkg</name>
   <version>0.0.0</version>
   <description>The dummy package to test sort_package_xml</description>
-  <maintainer email="isamu.takagi@tier4.jp">Takagi, Isamu</maintainer>
+  <maintainer email="foo.bar@example.com">Foo Bar</maintainer>
   <license>Apache License 2.0</license>
 
   <buildtool_depend>ament_cmake</buildtool_depend>
diff --git a/tests/test_sort_package_xml/normal.input.xml b/tests/test_sort_package_xml/normal.input.xml
index 0b24eb7..88f8ede 100644
--- a/tests/test_sort_package_xml/normal.input.xml
+++ b/tests/test_sort_package_xml/normal.input.xml
@@ -4,7 +4,7 @@
   <name>rospkg</name>
   <version>0.0.0</version>
   <description>The dummy package to test sort_package_xml</description>
-  <maintainer email="isamu.takagi@tier4.jp">Takagi, Isamu</maintainer>
+  <maintainer email="foo.bar@example.com">Foo Bar</maintainer>
   <license>Apache License 2.0</license>
 
   <buildtool_depend>ament_cmake</buildtool_depend>