diff --git a/pom.xml b/pom.xml
index e93b9e59..76209763 100644
--- a/pom.xml
+++ b/pom.xml
@@ -43,6 +43,7 @@
     <maven.version>3.6.3</maven.version>
     <!-- version should match ivy Engine sfl4j version! And version in EngineClassLoaderFactory.SLF4J_VERSION -->
     <slf4j.version>2.0.13</slf4j.version>
+    <junit-jupiter.version>5.10.2</junit-jupiter.version>
     <site.path>snapshot</site.path>
     <other.site.path>release</other.site.path>
     <other.site.name>Stable</other.site.name>
@@ -164,9 +165,15 @@
 
     <!-- TEST scoped -->
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <version>4.13.2</version>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
+      <version>${junit-jupiter.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.vintage</groupId>
+      <artifactId>junit-vintage-engine</artifactId>
+      <version>${junit-jupiter.version}</version>
       <scope>test</scope>
     </dependency>
     <dependency>
diff --git a/src/test/java/ch/ivyteam/ivy/maven/engine/TestClasspathJar.java b/src/test/java/ch/ivyteam/ivy/maven/engine/TestClasspathJar.java
index c54f39ad..87701bd3 100644
--- a/src/test/java/ch/ivyteam/ivy/maven/engine/TestClasspathJar.java
+++ b/src/test/java/ch/ivyteam/ivy/maven/engine/TestClasspathJar.java
@@ -18,38 +18,42 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import java.io.File;
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
-import java.util.Arrays;
+import java.nio.file.Path;
+import java.util.List;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
-import org.apache.commons.io.IOUtils;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
 
 import ch.ivyteam.ivy.maven.util.ClasspathJar;
 
-public class TestClasspathJar {
+class TestClasspathJar {
+
+  @TempDir
+  Path tempDir;
 
   @Test
-  public void readWriteClasspath() throws IOException {
-    File jarFile = Files.createTempFile("my", ".jar").toFile();
-    ClasspathJar jar = new ClasspathJar(jarFile);
-    File content = Files.createTempFile("content", ".jar").toFile();
-    jar.createFileEntries(Arrays.asList(content));
-
-    assertThat(jar.getClasspathFiles()).contains(content.getName());
-
-    ZipInputStream jarStream = new ZipInputStream(new FileInputStream(jarFile));
-    ZipEntry first = jarStream.getNextEntry();
-    assertThat(first.getName()).isEqualTo("META-INF/MANIFEST.MF");
-    String manifest = IOUtils.toString(jarStream, StandardCharsets.UTF_8);
-    assertThat(manifest)
-            .as("Manifest should not start with a whitespace or it will not be interpreted by the JVM")
-            .startsWith("Manifest-Version:");
+  void readWriteClasspath() throws IOException {
+    var jarFile = tempDir.resolve("my.jar");
+    Files.createFile(jarFile);
+    ClasspathJar jar = new ClasspathJar(jarFile.toFile());
+    var content = tempDir.resolve("content.jar");
+    Files.createFile(content);
+    jar.createFileEntries(List.of(content.toFile()));
+
+    assertThat(jar.getClasspathFiles()).contains(content.getFileName().toString());
+
+    try (var in = new ZipInputStream(Files.newInputStream(jarFile))) {
+      ZipEntry first = in.getNextEntry();
+      assertThat(first.getName()).isEqualTo("META-INF/MANIFEST.MF");
+      String manifest = new String(in.readAllBytes(), StandardCharsets.UTF_8);
+      assertThat(manifest)
+              .as("Manifest should not start with a whitespace or it will not be interpreted by the JVM")
+              .startsWith("Manifest-Version:");
+    }
   }
-
 }
diff --git a/src/test/java/ch/ivyteam/ivy/maven/engine/TestEngineVersionEvaluator.java b/src/test/java/ch/ivyteam/ivy/maven/engine/TestEngineVersionEvaluator.java
index 360f7a9e..ca73b89b 100644
--- a/src/test/java/ch/ivyteam/ivy/maven/engine/TestEngineVersionEvaluator.java
+++ b/src/test/java/ch/ivyteam/ivy/maven/engine/TestEngineVersionEvaluator.java
@@ -2,39 +2,29 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import java.io.File;
+import java.io.IOException;
 import java.nio.file.Files;
-import java.util.UUID;
+import java.nio.file.Path;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
 
 import ch.ivyteam.ivy.maven.engine.EngineClassLoaderFactory.OsgiDir;
 
-public class TestEngineVersionEvaluator {
+class TestEngineVersionEvaluator {
 
-  @Test
-  public void isOSGiEngine_invalid() {
-    File tempDir = createTempDir();
-    assertThat(EngineVersionEvaluator.isOSGiEngine(tempDir)).isFalse();
-  }
+  @TempDir
+  Path tempDir;
 
   @Test
-  public void isOSGiEngine_valid() {
-    File tempDir = createTempDir();
-    File systemDir = new File(tempDir, OsgiDir.INSTALL_AREA);
-    systemDir.mkdir();
-    systemDir.deleteOnExit();
-    assertThat(EngineVersionEvaluator.isOSGiEngine(tempDir)).isTrue();
+  void isOSGiEngine_invalid() {
+    assertThat(EngineVersionEvaluator.isOSGiEngine(tempDir.toFile())).isFalse();
   }
 
-  private static File createTempDir() {
-    try {
-      File tmpDir = Files.createTempDirectory(UUID.randomUUID().toString()).toFile();
-      tmpDir.deleteOnExit();
-      return tmpDir;
-    } catch (Exception e) {
-      throw new RuntimeException(e);
-    }
+  @Test
+  void isOSGiEngine_valid() throws IOException {
+    var systemDir = tempDir.resolve(OsgiDir.INSTALL_AREA);
+    Files.createDirectories(systemDir);
+    assertThat(EngineVersionEvaluator.isOSGiEngine(tempDir.toFile())).isTrue();
   }
-
 }
diff --git a/src/test/java/ch/ivyteam/ivy/maven/engine/deploy/TestYamlOptionsFactory.java b/src/test/java/ch/ivyteam/ivy/maven/engine/deploy/TestYamlOptionsFactory.java
index a89f01a7..7eb4f8af 100644
--- a/src/test/java/ch/ivyteam/ivy/maven/engine/deploy/TestYamlOptionsFactory.java
+++ b/src/test/java/ch/ivyteam/ivy/maven/engine/deploy/TestYamlOptionsFactory.java
@@ -3,18 +3,17 @@
 import static org.assertj.core.api.Assertions.assertThat;
 
 import java.io.IOException;
-import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 
-import org.apache.commons.io.IOUtils;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import ch.ivyteam.ivy.maven.deploy.DeployToEngineMojo;
 import ch.ivyteam.ivy.maven.deploy.DeployToEngineMojo.DefaultDeployOptions;
 
-public class TestYamlOptionsFactory {
+class TestYamlOptionsFactory {
+
   @Test
-  public void yamlWithAllNonDefaultOptions() throws Exception {
+  void yamlWithAllNonDefaultOptions() throws Exception {
     DeployToEngineMojo config = new DeployToEngineMojo();
     config.deployTestUsers = "true";
     config.deployTargetVersion = "RELEASED";
@@ -26,13 +25,13 @@ public void yamlWithAllNonDefaultOptions() throws Exception {
   }
 
   private String getFileContent(String file) throws IOException {
-    try (InputStream is = getClass().getResourceAsStream(file)) {
-      return IOUtils.toString(is, StandardCharsets.UTF_8);
+    try (var in = getClass().getResourceAsStream(file)) {
+      return new String(in.readAllBytes(), StandardCharsets.UTF_8);
     }
   }
 
   @Test
-  public void yamlWithAllDefaultOptions() throws Exception {
+  void yamlWithAllDefaultOptions() throws Exception {
     DeployToEngineMojo config = new DeployToEngineMojo();
     config.deployTestUsers = DefaultDeployOptions.DEPLOY_TEST_USERS;
     config.deployTargetVersion = DefaultDeployOptions.VERSION_AUTO;