diff --git a/pom.xml b/pom.xml
index 9b63304..58ff7e8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 	<artifactId>fess-script-example</artifactId>
 	<packaging>jar</packaging>
 	<name>Example Script Plugin</name>
-	<version>15.4.0-SNAPSHOT</version>
+	<version>15.5.0-SNAPSHOT</version>
 	<scm>
 		<connection>scm:git:git@github.com:codelibs/fess-script-example.git</connection>
 		<developerConnection>scm:git:git@github.com:codelibs/fess-script-example.git</developerConnection>
@@ -15,7 +15,7 @@
 	<parent>
 		<groupId>org.codelibs.fess</groupId>
 		<artifactId>fess-parent</artifactId>
-		<version>15.4.0</version>
+		<version>15.5.0-SNAPSHOT</version>
 		<relativePath />
 	</parent>
 	<build>
diff --git a/src/test/java/org/codelibs/fess/script/example/ExampleEngineTest.java b/src/test/java/org/codelibs/fess/script/example/ExampleEngineTest.java
index 2c101b3..dfb2e1d 100644
--- a/src/test/java/org/codelibs/fess/script/example/ExampleEngineTest.java
+++ b/src/test/java/org/codelibs/fess/script/example/ExampleEngineTest.java
@@ -15,13 +15,15 @@
  */
 package org.codelibs.fess.script.example;
 
+import org.junit.jupiter.api.TestInfo;
+
 import java.util.HashMap;
 import java.util.Map;
 
 import org.codelibs.fess.util.ComponentUtil;
-import org.dbflute.utflute.lastaflute.LastaFluteTestCase;
+import org.codelibs.fess.script.example.UnitScriptTestCase;
 
-public class ExampleEngineTest extends LastaFluteTestCase {
+public class ExampleEngineTest extends UnitScriptTestCase {
     public ExampleEngine exampleEngine;
 
     @Override
@@ -35,15 +37,15 @@ protected boolean isSuppressTestCaseTransaction() {
     }
 
     @Override
-    public void setUp() throws Exception {
-        super.setUp();
+    public void setUp(TestInfo testInfo) throws Exception {
+        super.setUp(testInfo);
         exampleEngine = new ExampleEngine();
     }
 
     @Override
-    public void tearDown() throws Exception {
+    public void tearDown(TestInfo testInfo) throws Exception {
         ComponentUtil.setFessConfig(null);
-        super.tearDown();
+        super.tearDown(testInfo);
     }
 
     public void test_evaluate() {
diff --git a/src/test/java/org/codelibs/fess/script/example/UnitScriptTestCase.java b/src/test/java/org/codelibs/fess/script/example/UnitScriptTestCase.java
new file mode 100644
index 0000000..f8b2518
--- /dev/null
+++ b/src/test/java/org/codelibs/fess/script/example/UnitScriptTestCase.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2012-2025 CodeLibs Project and the Others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific language
+ * governing permissions and limitations under the License.
+ */
+package org.codelibs.fess.script.example;
+
+import org.codelibs.fess.util.ComponentUtil;
+import org.dbflute.utflute.lastaflute.LastaFluteTestCase;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.TestInfo;
+
+public abstract class UnitScriptTestCase extends LastaFluteTestCase {
+    private static final ThreadLocal<TestInfo> currentTestInfo = new ThreadLocal<>();
+
+    @Override
+    protected String prepareConfigFile() {
+        return "test_app.xml";
+    }
+
+    @Override
+    protected void setUp(TestInfo testInfo) throws Exception {
+        currentTestInfo.set(testInfo);
+        super.setUp(testInfo);
+    }
+
+    @Override
+    protected void tearDown(TestInfo testInfo) throws Exception {
+        ComponentUtil.setFessConfig(null);
+        super.tearDown(testInfo);
+    }
+
+    protected String getName() {
+        TestInfo info = currentTestInfo.get();
+        return info != null ? info.getDisplayName() : "unknown";
+    }
+
+    // ===== Assert methods for JUnit 4/5 compatibility =====
+
+    protected void fail(String message) {
+        Assertions.fail(message);
+    }
+
+    protected void assertTrue(String message, boolean condition) {
+        Assertions.assertTrue(condition, message);
+    }
+
+    protected void assertFalse(String message, boolean condition) {
+        Assertions.assertFalse(condition, message);
+    }
+
+    protected void assertEquals(String message, Object expected, Object actual) {
+        Assertions.assertEquals(expected, actual, message);
+    }
+
+    protected void assertEquals(String message, long expected, long actual) {
+        Assertions.assertEquals(expected, actual, message);
+    }
+
+    protected void assertEquals(String message, double expected, double actual, double delta) {
+        Assertions.assertEquals(expected, actual, delta, message);
+    }
+
+    protected void assertEquals(double expected, double actual, double delta) {
+        Assertions.assertEquals(expected, actual, delta);
+    }
+
+    protected void assertEquals(String message, float expected, float actual, float delta) {
+        Assertions.assertEquals(expected, actual, delta, message);
+    }
+
+    protected void assertEquals(float expected, float actual, float delta) {
+        Assertions.assertEquals(expected, actual, delta);
+    }
+
+    protected void assertNotNull(String message, Object object) {
+        Assertions.assertNotNull(object, message);
+    }
+
+    protected void assertNull(String message, Object object) {
+        Assertions.assertNull(object, message);
+    }
+
+    protected void assertSame(Object expected, Object actual) {
+        Assertions.assertSame(expected, actual);
+    }
+
+    protected void assertSame(String message, Object expected, Object actual) {
+        Assertions.assertSame(expected, actual, message);
+    }
+
+    protected void assertNotSame(Object expected, Object actual) {
+        Assertions.assertNotSame(expected, actual);
+    }
+
+    protected void assertNotSame(String message, Object expected, Object actual) {
+        Assertions.assertNotSame(expected, actual, message);
+    }
+}