diff --git a/src/test/java/org/apache/commons/compress/archivers/ZipTest.java b/src/test/java/org/apache/commons/compress/archivers/ZipTest.java
index c44f5cb4078..31bf4ee3497 100644
--- a/src/test/java/org/apache/commons/compress/archivers/ZipTest.java
+++ b/src/test/java/org/apache/commons/compress/archivers/ZipTest.java
@@ -219,15 +219,10 @@ private ZipFile newZipFile(final File file) throws IOException {
     }
 
     private void readStream(final InputStream in, final ArchiveEntry entry, final Map<String, List<List<Long>>> map) throws IOException {
-        final byte[] buf = new byte[4096];
         final InputStreamStatistics stats = (InputStreamStatistics) in;
-        while (in.read(buf) != -1) {
-            // consume all.
-        }
-
+        IOUtils.consume(in);
         final String name = entry.getName();
         final List<List<Long>> list = map.computeIfAbsent(name, k -> new ArrayList<>());
-
         final long t = stats.getUncompressedCount();
         final long b = stats.getCompressedCount();
         list.add(Arrays.asList(t, b));
diff --git a/src/test/java/org/apache/commons/compress/compressors/brotli/BrotliCompressorInputStreamTest.java b/src/test/java/org/apache/commons/compress/compressors/brotli/BrotliCompressorInputStreamTest.java
index 3b854993eb8..dd974cbb49d 100644
--- a/src/test/java/org/apache/commons/compress/compressors/brotli/BrotliCompressorInputStreamTest.java
+++ b/src/test/java/org/apache/commons/compress/compressors/brotli/BrotliCompressorInputStreamTest.java
@@ -54,10 +54,7 @@ public void testBrotliDecode() throws IOException {
                 BrotliCompressorInputStream brotliInputStream = new BrotliCompressorInputStream(inputStream)) {
             final byte[] expected = readAllBytes("brotli.testdata.uncompressed");
             final ByteArrayOutputStream bos = new ByteArrayOutputStream();
-            int readByte = -1;
-            while ((readByte = brotliInputStream.read()) != -1) {
-                bos.write(readByte);
-            }
+            IOUtils.copy(brotliInputStream, bos);
             assertArrayEquals(expected, bos.toByteArray());
         }
     }
diff --git a/src/test/java/org/apache/commons/compress/compressors/zstandard/ZstdCompressorInputStreamTest.java b/src/test/java/org/apache/commons/compress/compressors/zstandard/ZstdCompressorInputStreamTest.java
index f07fda3837f..c8801097043 100644
--- a/src/test/java/org/apache/commons/compress/compressors/zstandard/ZstdCompressorInputStreamTest.java
+++ b/src/test/java/org/apache/commons/compress/compressors/zstandard/ZstdCompressorInputStreamTest.java
@@ -142,10 +142,7 @@ public void testZstdDecode() throws IOException {
                 ZstdCompressorInputStream zstdInputStream = new ZstdCompressorInputStream(inputStream)) {
             final byte[] expected = readAllBytes("zstandard.testdata");
             final ByteArrayOutputStream bos = new ByteArrayOutputStream();
-            int readByte = -1;
-            while ((readByte = zstdInputStream.read()) != -1) {
-                bos.write(readByte);
-            }
+            IOUtils.copy(zstdInputStream, bos);
             assertArrayEquals(expected, bos.toByteArray());
         }
     }
@@ -157,10 +154,7 @@ public void testZstdDecodeWithNoPool() throws IOException {
                 ZstdCompressorInputStream zstdInputStream = new ZstdCompressorInputStream(inputStream, NoPool.INSTANCE)) {
             final byte[] expected = readAllBytes("zstandard.testdata");
             final ByteArrayOutputStream bos = new ByteArrayOutputStream();
-            int readByte = -1;
-            while ((readByte = zstdInputStream.read()) != -1) {
-                bos.write(readByte);
-            }
+            IOUtils.copy(zstdInputStream, bos);
             assertArrayEquals(expected, bos.toByteArray());
         }
     }
@@ -172,10 +166,7 @@ public void testZstdDecodeWithRecyclingBufferPool() throws IOException {
                 ZstdCompressorInputStream zstdInputStream = new ZstdCompressorInputStream(inputStream, RecyclingBufferPool.INSTANCE)) {
             final byte[] expected = readAllBytes("zstandard.testdata");
             final ByteArrayOutputStream bos = new ByteArrayOutputStream();
-            int readByte = -1;
-            while ((readByte = zstdInputStream.read()) != -1) {
-                bos.write(readByte);
-            }
+            IOUtils.copy(zstdInputStream, bos);
             assertArrayEquals(expected, bos.toByteArray());
         }
     }