Assume so test is reported is as skipped rather than passed

src/test/java/org/apache/maven/plugins/javadoc/JavadocReportTest.java

@@ -65,6 +65,7 @@
 import static org.hamcrest.CoreMatchers.containsString;
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assume.assumeThat;
+import static org.junit.Assume.assumeTrue;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
@@ -470,15 +471,13 @@ public void testCustomConfiguration() throws Exception {
     }
 
     /**
-     * Method to test the doclet artifact configuration
+     * Method to test the doclet artifact configuration.
      *
      * @throws Exception if any
      */
     public void testDoclets() throws Exception {
-        if (JavaVersion.JAVA_SPECIFICATION_VERSION.isAtLeast("13")) {
-            // As of JDK 13, the com.sun.javadoc API is no longer supported.
-            return;
-        }
+
+        assumeTrue(JavaVersion.JAVA_SPECIFICATION_VERSION.isBefore("13"));
 
         // ----------------------------------------------------------------------
         // doclet-test: check if the file generated by UmlGraph exists and if