diff --git a/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/fs/contract/AbstractContractUnbufferTest.java b/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/fs/contract/AbstractContractUnbufferTest.java
deleted file mode 100644
index a1ac77e..0000000
--- a/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/fs/contract/AbstractContractUnbufferTest.java
+++ /dev/null
@@ -1,160 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- *  or more contributor license agreements.  See the NOTICE file
- *  distributed with this work for additional information
- *  regarding copyright ownership.  The ASF licenses this file
- *  to you 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.apache.hadoop.fs.contract;
-
-import org.junit.Test;
-
-import java.io.IOException;
-import java.util.Arrays;
-
-import org.apache.hadoop.fs.FSDataInputStream;
-import org.apache.hadoop.fs.Path;
-
-import static org.apache.hadoop.fs.contract.ContractTestUtils.createFile;
-import static org.apache.hadoop.fs.contract.ContractTestUtils.dataset;
-
-/**
- * Contract tests for {@link org.apache.hadoop.fs.CanUnbuffer#unbuffer}.
- * Note: this is from Hadoop 3.3, can be removed after dependency upgrade.
- */
-public abstract class AbstractContractUnbufferTest
-    extends AbstractFSContractTestBase {
-
-  private Path file;
-  private byte[] fileBytes;
-
-  private static final String SUPPORTS_UNBUFFER = "supports-unbuffer";
-
-  @Override
-  public void setup() throws Exception {
-    super.setup();
-    skipIfUnsupported(SUPPORTS_UNBUFFER);
-    file = path("unbufferFile");
-    fileBytes = dataset(TEST_FILE_LEN, 0, 255);
-    createFile(getFileSystem(), file, true, fileBytes);
-  }
-
-  @Test
-  public void testUnbufferAfterRead() throws IOException {
-    describe("unbuffer a file after a single read");
-    try (FSDataInputStream stream = getFileSystem().open(file)) {
-      validateFullFileContents(stream);
-      unbuffer(stream);
-    }
-  }
-
-  @Test
-  public void testUnbufferBeforeRead() throws IOException {
-    describe("unbuffer a file before a read");
-    try (FSDataInputStream stream = getFileSystem().open(file)) {
-      unbuffer(stream);
-      validateFullFileContents(stream);
-    }
-  }
-
-  @Test
-  public void testUnbufferEmptyFile() throws IOException {
-    Path emptyFile = path("emptyUnbufferFile");
-    getFileSystem().create(emptyFile, true).close();
-    describe("unbuffer an empty file");
-    try (FSDataInputStream stream = getFileSystem().open(emptyFile)) {
-      unbuffer(stream);
-    }
-  }
-
-  @Test
-  public void testUnbufferOnClosedFile() throws IOException {
-    describe("unbuffer a file after it is closed");
-    FSDataInputStream stream = null;
-    try {
-      stream = getFileSystem().open(file);
-      validateFullFileContents(stream);
-    } finally {
-      if (stream != null) {
-        stream.close();
-      }
-    }
-    if (stream != null) {
-      unbuffer(stream);
-    }
-  }
-
-  @Test
-  public void testMultipleUnbuffers() throws IOException {
-    describe("unbuffer a file multiple times");
-    try (FSDataInputStream stream = getFileSystem().open(file)) {
-      unbuffer(stream);
-      unbuffer(stream);
-      validateFullFileContents(stream);
-      unbuffer(stream);
-      unbuffer(stream);
-    }
-  }
-
-  @Test
-  public void testUnbufferMultipleReads() throws IOException {
-    describe("unbuffer a file multiple times");
-    try (FSDataInputStream stream = getFileSystem().open(file)) {
-      unbuffer(stream);
-      validateFileContents(stream, TEST_FILE_LEN / 8, 0);
-      unbuffer(stream);
-      validateFileContents(stream, TEST_FILE_LEN / 8, TEST_FILE_LEN / 8);
-      validateFileContents(stream, TEST_FILE_LEN / 4, TEST_FILE_LEN / 4);
-      unbuffer(stream);
-      validateFileContents(stream, TEST_FILE_LEN / 2, TEST_FILE_LEN / 2);
-      unbuffer(stream);
-      assertEquals("stream should be at end of file", TEST_FILE_LEN,
-              stream.getPos());
-    }
-  }
-
-  private void unbuffer(FSDataInputStream stream) throws IOException {
-    long pos = stream.getPos();
-    stream.unbuffer();
-    assertEquals("unbuffer unexpectedly changed the stream position", pos,
-            stream.getPos());
-  }
-
-  protected void validateFullFileContents(FSDataInputStream stream)
-          throws IOException {
-    assertNotNull(stream);
-    validateFileContents(stream, TEST_FILE_LEN, 0);
-  }
-
-  protected void validateFileContents(FSDataInputStream stream, int length,
-                                      int startIndex)
-          throws IOException {
-    byte[] streamData = new byte[length];
-    assertEquals("failed to read expected number of bytes from "
-            + "stream. This may be transient",
-        length, stream.read(streamData));
-    byte[] validateFileBytes;
-    if (startIndex == 0 && length == fileBytes.length) {
-      validateFileBytes = fileBytes;
-    } else {
-      validateFileBytes = Arrays.copyOfRange(fileBytes, startIndex,
-              startIndex + length);
-    }
-    assertArrayEquals("invalid file contents", validateFileBytes, streamData);
-  }
-
-  protected Path getFile() {
-    return file;
-  }
-}