diff --git a/src/test/java/org/apache/maven/plugins/invoker/InterpolationTest.java b/src/test/java/org/apache/maven/plugins/invoker/InterpolationTest.java
index 83850119..dd45ae73 100644
--- a/src/test/java/org/apache/maven/plugins/invoker/InterpolationTest.java
+++ b/src/test/java/org/apache/maven/plugins/invoker/InterpolationTest.java
@@ -37,14 +37,14 @@
  * @author Olivier Lamy
  * @since 22 nov. 07
  */
-class InterpolationTest extends AbstractTestUtil {
+class InterpolationTest {
 
     private MavenProject buildMavenProjectStub() {
         MavenProject project = new MavenProject();
         project.setVersion("1.0-SNAPSHOT");
         project.setArtifactId("foo");
         project.setGroupId("bar");
-        project.setFile(new File(getBasedir(), "pom.xml"));
+        project.setFile(new File(TestUtil.getBasedir(), "pom.xml"));
         Properties properties = new Properties();
         properties.put("fooOnProject", "barOnProject");
         project.getModel().setProperties(properties);
@@ -72,16 +72,16 @@ void testCompositeMap() {
     void testPomInterpolation() throws Exception {
         File interpolatedPomFile;
         InvokerMojo invokerMojo = new InvokerMojo();
-        setVariableValueToObject(invokerMojo, "project", buildMavenProjectStub());
-        setVariableValueToObject(invokerMojo, "settings", new Settings());
+        TestUtil.setVariableValueToObject(invokerMojo, "project", buildMavenProjectStub());
+        TestUtil.setVariableValueToObject(invokerMojo, "settings", new Settings());
         Properties properties = new Properties();
         properties.put("foo", "bar");
         properties.put("version", "2.0-SNAPSHOT");
-        setVariableValueToObject(invokerMojo, "filterProperties", properties);
-        String dirPath = getBasedir() + File.separatorChar + "src" + File.separatorChar + "test" + File.separatorChar
-                + "resources" + File.separatorChar + "unit" + File.separatorChar + "interpolation";
+        TestUtil.setVariableValueToObject(invokerMojo, "filterProperties", properties);
+        String dirPath = TestUtil.getBasedir() + File.separatorChar + "src" + File.separatorChar + "test"
+                + File.separatorChar + "resources" + File.separatorChar + "unit" + File.separatorChar + "interpolation";
 
-        interpolatedPomFile = new File(getBasedir(), "target/interpolated-pom.xml");
+        interpolatedPomFile = new File(TestUtil.getBasedir(), "target/interpolated-pom.xml");
         invokerMojo.buildInterpolatedFile(new File(dirPath, "pom.xml"), interpolatedPomFile);
         try (Reader reader = new XmlStreamReader(interpolatedPomFile)) {
             String content = IOUtil.toString(reader);
diff --git a/src/test/java/org/apache/maven/plugins/invoker/InvokerMojoTest.java b/src/test/java/org/apache/maven/plugins/invoker/InvokerMojoTest.java
index fd603222..b8b8f33c 100644
--- a/src/test/java/org/apache/maven/plugins/invoker/InvokerMojoTest.java
+++ b/src/test/java/org/apache/maven/plugins/invoker/InvokerMojoTest.java
@@ -27,13 +27,15 @@
 import org.apache.maven.settings.Settings;
 import org.junit.jupiter.api.Test;
 
+import static org.apache.maven.plugins.invoker.TestUtil.getBasedir;
+import static org.apache.maven.plugins.invoker.TestUtil.setVariableValueToObject;
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
  * @author Olivier Lamy
  * @since 18 nov. 07
  */
-class InvokerMojoTest extends AbstractTestUtil {
+class InvokerMojoTest {
 
     private static final String DUMMY_PROJECT = "dummy" + File.separator + "pom.xml";
     private static final String WITH_POM_DIR_PROJECT = "with-pom-project-dir" + File.separator + "pom.xml";
diff --git a/src/test/java/org/apache/maven/plugins/invoker/AbstractTestUtil.java b/src/test/java/org/apache/maven/plugins/invoker/TestUtil.java
similarity index 80%
rename from src/test/java/org/apache/maven/plugins/invoker/AbstractTestUtil.java
rename to src/test/java/org/apache/maven/plugins/invoker/TestUtil.java
index 2a2f791e..452b8ba9 100644
--- a/src/test/java/org/apache/maven/plugins/invoker/AbstractTestUtil.java
+++ b/src/test/java/org/apache/maven/plugins/invoker/TestUtil.java
@@ -22,14 +22,16 @@
 
 import org.codehaus.plexus.util.ReflectionUtils;
 
-abstract class AbstractTestUtil {
+class TestUtil {
 
-    protected String getBasedir() {
+    private TestUtil() {}
+
+    static String getBasedir() {
         String path = System.getProperty("basedir");
         return path != null ? path : new File("").getAbsolutePath();
     }
 
-    protected void setVariableValueToObject(Object object, String filed, Object value) throws IllegalAccessException {
-        ReflectionUtils.setVariableValueInObject(object, filed, value);
+    static void setVariableValueToObject(Object object, String field, Object value) throws IllegalAccessException {
+        ReflectionUtils.setVariableValueInObject(object, field, value);
     }
 }