diff --git a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/ftp/FtpFileNameParserTest.java b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/ftp/FtpFileNameParserTest.java
index 8f87b7bb6e..1f31ad2c42 100644
--- a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/ftp/FtpFileNameParserTest.java
+++ b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/ftp/FtpFileNameParserTest.java
@@ -17,7 +17,7 @@
 package org.apache.commons.vfs2.provider.ftp;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
 
 import org.apache.commons.vfs2.FileName;
 import org.apache.commons.vfs2.provider.GenericFileName;
@@ -34,7 +34,7 @@ public class FtpFileNameParserTest {
     public void testGenericFileName1() throws Exception {
         final String uri = "ftp://blanks:blanks@localhost/path/file_b%20lanks";
         final FileName n = FtpFileNameParser.getInstance().parseUri(null, null, uri);
-        assertTrue(n instanceof GenericFileName);
+        assertInstanceOf(GenericFileName.class, n);
         final String genericUri = n.getURI();
         assertEquals(genericUri, uri.toString());
     }
@@ -43,7 +43,7 @@ public void testGenericFileName1() throws Exception {
     public void testGenericFileName2() throws Exception {
         final String uri = "ftp://b%20lanks:b%20lanks@localhost/path/file";
         final FileName n = FtpFileNameParser.getInstance().parseUri(null, null, uri);
-        assertTrue(n instanceof GenericFileName);
+        assertInstanceOf(GenericFileName.class, n);
         final String genericUri = n.getURI();
         assertEquals(genericUri, uri.toString());
     }
diff --git a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/gzip/GzipTest.java b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/gzip/GzipTest.java
index cc69d9a6fd..17b2a798c4 100644
--- a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/gzip/GzipTest.java
+++ b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/gzip/GzipTest.java
@@ -39,9 +39,9 @@ public void testCreateGzipFileSystem() throws IOException {
         try (FileObject localFileObject = manager.resolveFile(gzFile.getAbsolutePath());
                 FileObject gzFileObjectDir = manager.createFileSystem(localFileObject);
                 FileObject gzFileObject = gzFileObjectDir.resolveFile("好.txt")) {
-            Assertions.assertTrue(gzFileObjectDir instanceof GzipFileObject);
+            Assertions.assertInstanceOf(GzipFileObject.class, gzFileObjectDir);
             Assertions.assertTrue(gzFileObjectDir.isFolder());
-            Assertions.assertTrue(gzFileObject instanceof GzipFileObject);
+            Assertions.assertInstanceOf(GzipFileObject.class, gzFileObject);
             Assertions.assertFalse(gzFileObject.isFolder());
             try (FileContent content = gzFileObject.getContent()) {
                 Assertions.assertEquals("aaa", content.getString(StandardCharsets.UTF_8));
diff --git a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/tar/CreateFileSystemTest.java b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/tar/CreateFileSystemTest.java
index 0083f27a01..ab489d9927 100644
--- a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/tar/CreateFileSystemTest.java
+++ b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/tar/CreateFileSystemTest.java
@@ -16,7 +16,7 @@
  */
 package org.apache.commons.vfs2.provider.tar;
 
-import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
 
 import java.io.File;
 import java.io.IOException;
@@ -48,7 +48,7 @@ public void testTarFile() throws IOException {
 
         final String testFilePath = "src/test/resources/test-data/test.tar";
         try (FileObject fileObject = createFileSystem(testFilePath)) {
-            assertTrue(fileObject instanceof TarFileObject);
+            assertInstanceOf(TarFileObject.class, fileObject);
         }
     }
 
@@ -57,7 +57,7 @@ public void testTbz2File() throws IOException {
 
         final String testFilePath = "src/test/resources/test-data/test.tbz2";
         try (FileObject fileObject = createFileSystem(testFilePath)) {
-            assertTrue(fileObject instanceof TarFileObject);
+            assertInstanceOf(TarFileObject.class, fileObject);
         }
     }
 
@@ -66,7 +66,7 @@ public void testTgzFile() throws IOException {
 
         final String testFilePath = "src/test/resources/test-data/test.tgz";
         try (FileObject fileObject = createFileSystem(testFilePath)) {
-            assertTrue(fileObject instanceof TarFileObject);
+            assertInstanceOf(TarFileObject.class, fileObject);
         }
     }
 
diff --git a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/Jira733Test.java b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/Jira733Test.java
index f426ad33a4..7390c0836b 100644
--- a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/Jira733Test.java
+++ b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/Jira733Test.java
@@ -16,6 +16,7 @@
  */
 package org.apache.commons.vfs2.provider.zip;
 
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
@@ -58,7 +59,7 @@ private void testZipParentLayer(final VfsConsumer<FileObject> consumer) throws E
         final String nestedPath = "zip:" + file.getAbsolutePath() + "!/read-tests/file1.txt";
         try (FileObject fileObject = VFS.getManager().resolveFile(nestedPath);
                 final FileObject wrappedFileObject = new OnCallRefreshFileObject(fileObject)) {
-            assertTrue(fileObject instanceof ZipFileObject);
+            assertInstanceOf(ZipFileObject.class, fileObject);
             @SuppressWarnings({ "unused", "resource" })
             final
             ZipFileObject zipFileObject = (ZipFileObject) fileObject;
diff --git a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/ZipProviderWithCharsetNullTestCase.java b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/ZipProviderWithCharsetNullTestCase.java
index e504d4090a..73d7aaee71 100644
--- a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/ZipProviderWithCharsetNullTestCase.java
+++ b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/ZipProviderWithCharsetNullTestCase.java
@@ -58,7 +58,7 @@ public FileObject getBaseTestFolder(final FileSystemManager manager) throws Exce
         final String uri = "zip:file:" + zipFile.getAbsolutePath() + "!/";
         final FileObject resolvedFile = manager.resolveFile(uri, opts);
         final FileSystem fileSystem = resolvedFile.getFileSystem();
-        Assertions.assertTrue(fileSystem instanceof ZipFileSystem);
+        Assertions.assertInstanceOf(ZipFileSystem.class, fileSystem);
         final ZipFileSystem zipFileSystem = (ZipFileSystem) fileSystem;
         Assertions.assertEquals(StandardCharsets.UTF_8, zipFileSystem.getCharset());
         return resolvedFile;
diff --git a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/ZipProviderWithCharsetTestCase.java b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/ZipProviderWithCharsetTestCase.java
index 820c191313..71a7aa847e 100644
--- a/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/ZipProviderWithCharsetTestCase.java
+++ b/commons-vfs2/src/test/java/org/apache/commons/vfs2/provider/zip/ZipProviderWithCharsetTestCase.java
@@ -58,7 +58,7 @@ public FileObject getBaseTestFolder(final FileSystemManager manager) throws Exce
         final String uri = "zip:file:" + zipFile.getAbsolutePath() + "!/";
         final FileObject resolvedFile = manager.resolveFile(uri, opts);
         final FileSystem fileSystem = resolvedFile.getFileSystem();
-        Assertions.assertTrue(fileSystem instanceof ZipFileSystem);
+        Assertions.assertInstanceOf(ZipFileSystem.class, fileSystem);
         final ZipFileSystem zipFileSystem = (ZipFileSystem) fileSystem;
         Assertions.assertEquals(StandardCharsets.UTF_8, zipFileSystem.getCharset());
         return resolvedFile;