diff --git a/src/main/php/io/streams/Bz2CompressingOutputStream.class.php b/src/main/php/io/streams/Bz2CompressingOutputStream.class.php
deleted file mode 100755
index a1d7e5e3b..000000000
--- a/src/main/php/io/streams/Bz2CompressingOutputStream.class.php
+++ /dev/null
@@ -1,79 +0,0 @@
-<?php namespace io\streams;
-
-use io\IOException;
-use lang\{Value, IllegalArgumentException};
-use util\Comparison;
-
-/**
- * OuputStream that compresses content using bzip2
- *
- * @ext   bz2
- * @test  xp://net.xp_framework.unittest.io.streams.Bz2CompressingOutputStreamTest
- */
-class Bz2CompressingOutputStream implements OutputStream, Value {
-  use Comparison;
-
-  protected $out;
-  
-  /**
-   * Constructor
-   *
-   * @param  io.streams.OutputStream $out
-   * @param  int $level
-   * @throws lang.IllegalArgumentException if the level is not between 0 and 9
-   */
-  public function __construct(OutputStream $out, $level= 6) {
-    if ($level < 0 || $level > 9) {
-      throw new IllegalArgumentException('Level '.$level.' out of range [0..9]');
-    }
-
-    $this->out= Streams::writeableFd($out);
-    if (!stream_filter_append($this->out, 'bzip2.compress', STREAM_FILTER_WRITE, ['blocks' => $level])) {
-      fclose($this->out);
-      $this->out= null;
-      throw new IOException('Could not append stream filter');
-    }
-  }
-  
-  /**
-   * Write a string
-   *
-   * @param   var arg
-   */
-  public function write($arg) {
-    fwrite($this->out, $arg);
-  }
-
-  /**
-   * Flush this buffer
-   *
-   */
-  public function flush() {
-    fflush($this->out);
-  }
-
-  /**
-   * Close this buffer. Flushes this buffer and then calls the close()
-   * method on the underlying OuputStream.
-   *
-   */
-  public function close() {
-    if (!$this->out) return;
-    fclose($this->out);
-    $this->out= null;
-  }
-
-  /**
-   * Destructor. Ensures output stream is closed.
-   *
-   */
-  public function __destruct() {
-    $this->close();
-  }
-
-
-  /** @return string */
-  public function toString() {
-    return nameof($this).'(->'.$this->in.')';
-  }
-}
diff --git a/src/main/php/io/streams/Bz2DecompressingInputStream.class.php b/src/main/php/io/streams/Bz2DecompressingInputStream.class.php
deleted file mode 100755
index 91f2ef715..000000000
--- a/src/main/php/io/streams/Bz2DecompressingInputStream.class.php
+++ /dev/null
@@ -1,71 +0,0 @@
-<?php namespace io\streams;
-
-use io\IOException;
-use lang\Value;
-use util\Comparison;
-
-/**
- * InputStream that decompresses 
- *
- * @ext   bz2
- * @test  net.xp_framework.unittest.io.streams.Bz2DecompressingInputStreamTest
- */
-class Bz2DecompressingInputStream implements InputStream, Value {
-  use Comparison;
-
-  protected $in;
-  
-  /**
-   * Constructor
-   *
-   * @param  io.streams.InputStream $in
-   */
-  public function __construct(InputStream $in) {
-    $this->in= Streams::readableFd($in);
-    if (!stream_filter_append($this->in, 'bzip2.decompress', STREAM_FILTER_READ)) {
-      throw new IOException('Could not append stream filter');
-    }
-  }
-
-  /**
-   * Read a string
-   *
-   * @param   int limit default 8192
-   * @return  string
-   */
-  public function read($limit= 8192) {
-    return fread($this->in, $limit);
-  }
-
-  /**
-   * Returns the number of bytes that can be read from this stream 
-   * without blocking.
-   *
-   */
-  public function available() {
-    return feof($this->in) ? 0 : 1;
-  }
-
-  /**
-   * Close this buffer.
-   *
-   */
-  public function close() {
-    if (!$this->in) return;
-    fclose($this->in);
-    $this->in= null;
-  }
-  
-  /**
-   * Destructor. Ensures output stream is closed.
-   *
-   */
-  public function __destruct() {
-    $this->close();
-  }
-
-  /** @return string */
-  public function toString() {
-    return nameof($this).'(->'.$this->in.')';
-  }
-}
\ No newline at end of file
diff --git a/src/main/php/io/streams/DeflatingOutputStream.class.php b/src/main/php/io/streams/DeflatingOutputStream.class.php
deleted file mode 100755
index d05d5339d..000000000
--- a/src/main/php/io/streams/DeflatingOutputStream.class.php
+++ /dev/null
@@ -1,77 +0,0 @@
-<?php namespace io\streams;
-
-use lang\Value;
-use util\Comparison;
-
-/**
- * OuputStream that deflates 
- *
- * @ext   zlib
- * @test  net.xp_framework.unittest.io.streams.DeflatingOutputStreamTest
- */
-class DeflatingOutputStream implements OutputStream, Value {
-  use Comparison;
-
-  protected $out= null;
-  
-  /**
-   * Constructor
-   *
-   * @param   io.streams.OutputStream out
-   * @param   int level default 6
-   * @throws  lang.IllegalArgumentException if the level is not between 0 and 9
-   */
-  public function __construct(OutputStream $out, $level= 6) {
-    if ($level < 0 || $level > 9) {
-      throw new \lang\IllegalArgumentException('Level '.$level.' out of range [0..9]');
-    }
-    $this->out= Streams::writeableFd($out);
-    if (!stream_filter_append($this->out, 'zlib.deflate', STREAM_FILTER_WRITE, $level)) {
-      fclose($this->out);
-      $this->out= null;
-      throw new \io\IOException('Could not append stream filter');
-    }
-  }
-  
-  /**
-   * Write a string
-   *
-   * @param   var arg
-   */
-  public function write($arg) {
-    fwrite($this->out, $arg);
-  }
-
-  /**
-   * Flush this buffer
-   *
-   */
-  public function flush() {
-    fflush($this->out);
-  }
-
-  /**
-   * Close this buffer. Flushes this buffer and then calls the close()
-   * method on the underlying OuputStream.
-   *
-   */
-  public function close() {
-    if (!$this->out) return;
-    fclose($this->out);
-    $this->out= null;
-  }
-
-  /**
-   * Destructor. Ensures output stream is closed.
-   *
-   */
-  public function __destruct() {
-    $this->close();
-  }
-
-
-  /** @return string */
-  public function toString() {
-    return nameof($this).'(->'.$this->out.')';
-  }
-}
diff --git a/src/main/php/io/streams/GzCompressingOutputStream.class.php b/src/main/php/io/streams/GzCompressingOutputStream.class.php
deleted file mode 100755
index 1f98b937f..000000000
--- a/src/main/php/io/streams/GzCompressingOutputStream.class.php
+++ /dev/null
@@ -1,109 +0,0 @@
-<?php namespace io\streams;
-
-use lang\Value;
-use util\Comparison;
-
-/**
- * OuputStream that compresses content using GZIP encoding. Data
- * produced with this stream can be read with the "gunzip" command
- * line utility and its "zcat", "zgrep", ... list of friends.
- *
- * @ext   zlib
- * @see   rfc://1952
- * @test  xp://net.xp_framework.unittest.io.streams.GzCompressingOutputStreamTest
- */
-class GzCompressingOutputStream implements OutputStream, Value {
-  use Comparison;
-
-  protected $out= null;
-  protected $md= null;
-  protected $length= null;
-  protected $filter= null;
-  
-  /**
-   * Constructor
-   *
-   * @param   io.streams.OutputStream out
-   * @param   int level default 6
-   * @throws  lang.IllegalArgumentException if the level is not between 0 and 9
-   */
-  public function __construct(OutputStream $out, $level= 6) {
-    if ($level < 0 || $level > 9) {
-      throw new \lang\IllegalArgumentException('Level '.$level.' out of range [0..9]');
-    }
-
-    // Write GZIP format header:
-    // * ID1, ID2 (Identification, \x1F, \x8B)
-    // * CM       (Compression Method, 8 = deflate)
-    // * FLG      (Flags, use 0)
-    // * MTIME    (Modification time, Un*x timestamp)
-    // * XFL      (Extra flags, 2 = compressor used maximum compression)
-    // * OS       (Operating system, 255 = unknown)
-    $out->write(pack('CCCCVCC', 0x1F, 0x8B, 8, 0, time(), 2, 255));
-    
-    // Now, convert stream to file handle and append deflating filter
-    $this->out= Streams::writeableFd($out);
-    if (!($this->filter= stream_filter_append($this->out, 'zlib.deflate', STREAM_FILTER_WRITE, $level))) {
-      fclose($this->out);
-      $this->out= null;
-      throw new \io\IOException('Could not append stream filter');
-    }
-    $this->md= hash_init('crc32b');
-  }
-  
-  /**
-   * Write a string
-   *
-   * @param   var arg
-   */
-  public function write($arg) {
-    fwrite($this->out, $arg);
-    $this->length+= strlen($arg);
-    hash_update($this->md, $arg);
-  }
-
-  /**
-   * Flush this buffer
-   *
-   */
-  public function flush() {
-    fflush($this->out);
-  }
-
-  /**
-   * Close this buffer. Flushes this buffer and then calls the close()
-   * method on the underlying OuputStream.
-   *
-   */
-  public function close() {
-    if (!$this->out) return;
-  
-    // Remove deflating filter so we can continue writing "raw"
-    stream_filter_remove($this->filter);
-
-    $final= hash_final($this->md, true);
-    
-    // Write GZIP footer:
-    // * CRC32    (CRC-32 checksum)
-    // * ISIZE    (Input size)
-    fwrite($this->out, pack('aaaaV', $final[3], $final[2], $final[1], $final[0], $this->length));
-    fclose($this->out);
-    $this->out= null;
-    $this->md= null;
-  }
-  
-  /**
-   * Destructor. Ensures output stream is closed.
-   *
-   */
-  public function __destruct() {
-    if (!$this->out) return;
-    fclose($this->out);
-    $this->out= null;
-  }
-
-  /** @return string */
-  public function toString() {
-    return nameof($this).'(->'.$this->out.')';
-  }
-}
diff --git a/src/main/php/io/streams/GzDecompressingInputStream.class.php b/src/main/php/io/streams/GzDecompressingInputStream.class.php
deleted file mode 100755
index 141036577..000000000
--- a/src/main/php/io/streams/GzDecompressingInputStream.class.php
+++ /dev/null
@@ -1,144 +0,0 @@
-<?php namespace io\streams;
-
-use io\IOException;
-use lang\Value;
-use util\Comparison;
-
-/**
- * InputStream that decompresses data compressed using GZIP encoding.
- *
- * @ext   zlib
- * @see   rfc://1952
- * @test  xp://net.xp_framework.unittest.io.streams.GzDecompressingInputStreamTest
- */
-class GzDecompressingInputStream implements InputStream, Value {
-  use Comparison;
-
-  private $in, $header;
-  public static $wrapped= [];
-
-  static function __static() {
-    stream_wrapper_register('zlib.bounded', get_class(new class() {
-      protected $id, $st= null;
-      protected $buffer= "";
-      public $context = null;
-      
-      public function stream_open($path, $mode, $options, $opened_path) {
-        $this->st= GzDecompressingInputStream::$wrapped[$path];
-        $this->id= $path;
-        return true;
-      }
-
-      public function stream_read($count) {
-
-        // Ensure we have at least 9 bytes
-        $l= strlen($this->buffer);
-        while ($l < 9 && $this->st->available() > 0) {
-          $chunk= $this->st->read($count);
-          $l+= strlen($chunk);
-          $this->buffer.= $chunk;
-        }
-        
-        // Now return the everything except the last 8 bytes
-        $read= substr($this->buffer, 0, -8);
-        $this->buffer= substr($this->buffer, -8);
-        return $read;
-      }
-
-      public function stream_eof() {
-        return 0 === $this->st->available();
-      }
-
-      public function stream_flush() {
-        return true;
-      }
-      
-      public function stream_close() {
-        $this->st->close();
-        unset(GzDecompressingInputStream::$wrapped[$this->id]);
-      }
-    }));
-  }
-  
-  /**
-   * Constructor
-   *
-   * @param   io.streams.InputStream $in
-   * @throws  io.IOException
-   */
-  public function __construct(InputStream $in) {
-    
-    // Read GZIP format header
-    // * ID1, ID2 (Identification, \x1F, \x8B)
-    // * CM       (Compression Method, 8 = deflate)
-    // * FLG      (Flags)
-    // * MTIME    (Modification time, Un*x timestamp)
-    // * XFL      (Extra flags)
-    // * OS       (Operating system)
-    $this->header= unpack('a2id/Cmethod/Cflags/Vtime/Cextra/Cos', $in->read(10));
-    if ("\x1F\x8B" != $this->header['id']) {
-      throw new IOException('Invalid format, expected \037\213, have '.addcslashes($this->header['id'], "\0..\377"));
-    }
-    if (8 !== $this->header['method']) {
-      throw new IOException('Unknown compression method #'.$this->header['method']);
-    }
-    if (8 === ($this->header['flags'] & 8)) {
-      $this->header['filename']= '';
-      while ("\x00" !== ($b= $in->read(1))) {
-        $this->header['filename'].= $b;
-      }
-    }
-
-    // Now, convert stream to file handle and append inflating filter
-    $wri= 'zlib.bounded://'.spl_object_hash($in);
-    self::$wrapped[$wri]= $in;
-    $this->in= fopen($wri, 'r');
-    if (!stream_filter_append($this->in, 'zlib.inflate', STREAM_FILTER_READ)) {
-      throw new IOException('Could not append stream filter');
-    }
-  }
-
-  /** @return [:var] */
-  public function header() { return $this->header; }
-
-  /**
-   * Read a string
-   *
-   * @param   int limit default 8192
-   * @return  string
-   */
-  public function read($limit= 8192) {
-    return fread($this->in, $limit);
-  }
-
-  /**
-   * Returns the number of bytes that can be read from this stream 
-   * without blocking.
-   *
-   */
-  public function available() {
-    return feof($this->in) ? 0 : 1;
-  }
-
-  /**
-   * Close this buffer.
-   *
-   */
-  public function close() {
-    if (!$this->in) return;
-    fclose($this->in);
-    $this->in= null;
-  }
-  
-  /**
-   * Destructor. Ensures output stream is closed.
-   */
-  public function __destruct() {
-    $this->close();
-  }
-
-  /** @return string */
-  public function toString() {
-    return nameof($this).'(->'.$this->in.')';
-  }
-}
diff --git a/src/main/php/io/streams/InflatingInputStream.class.php b/src/main/php/io/streams/InflatingInputStream.class.php
deleted file mode 100755
index 16dcf2a75..000000000
--- a/src/main/php/io/streams/InflatingInputStream.class.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php namespace io\streams;
-
-use lang\Value;
-use util\Comparison;
-
-/**
- * InputStream that inflates 
- *
- * @ext   zlib
- * @test  net.xp_framework.unittest.io.streams.InflatingInputStreamTest
- */
-class InflatingInputStream implements InputStream, Value {
-  use Comparison;
-
-  protected $in;
-  
-  /**
-   * Constructor
-   *
-   * @param   io.streams.InputStream in
-   */
-  public function __construct(InputStream $in) {
-    $this->in= Streams::readableFd($in);
-    if (!stream_filter_append($this->in, 'zlib.inflate', STREAM_FILTER_READ)) {
-      throw new \io\IOException('Could not append stream filter');
-    }
-  }
-
-  /**
-   * Read a string
-   *
-   * @param   int limit default 8192
-   * @return  string
-   */
-  public function read($limit= 8192) {
-    return fread($this->in, $limit);
-  }
-
-  /**
-   * Returns the number of bytes that can be read from this stream 
-   * without blocking.
-   *
-   */
-  public function available() {
-    return feof($this->in) ? 0 : 1;
-  }
-
-  /**
-   * Close this buffer.
-   *
-   */
-  public function close() {
-    if (!$this->in) return;
-    fclose($this->in);
-    $this->in= null;
-  }
-  
-  /**
-   * Destructor. Ensures output stream is closed.
-   *
-   */
-  public function __destruct() {
-    $this->close();
-  }
-
-  /** @return string */
-  public function toString() {
-    return nameof($this).'(->'.$this->in.')';
-  }
-}
diff --git a/src/test/php/io/unittest/AbstractCompressingOutputStreamTest.class.php b/src/test/php/io/unittest/AbstractCompressingOutputStreamTest.class.php
deleted file mode 100755
index 19e7de947..000000000
--- a/src/test/php/io/unittest/AbstractCompressingOutputStreamTest.class.php
+++ /dev/null
@@ -1,101 +0,0 @@
-<?php namespace io\unittest;
-
-use io\streams\{MemoryOutputStream, OutputStream};
-use lang\IllegalArgumentException;
-use test\{Assert, Expect, Test};
-use util\Bytes;
-
-abstract class AbstractCompressingOutputStreamTest {
-
-  /**
-   * Get stream
-   *
-   * @param  io.streams.OutputStream $wrapped
-   * @param  int $level
-   * @return io.streams.OutputStream
-   */
-  protected abstract function newStream(OutputStream $wrapped, $level);
-
-  /**
-   * Compress data
-   *
-   * @param  string $in
-   * @param  int $level
-   * @return string
-   */
-  protected abstract function compress($in, $level);
-
-  /**
-   * Asserts compressed data equals. Used util.Bytes objects in
-   * comparison to prevent binary data from appearing in assertion 
-   * failure message.
-   *
-   * @param  string $expected
-   * @param  string $actual
-   * @throws unittest.AssertionFailedError
-   */
-  protected function assertCompressedDataEquals($expected, $actual) {
-    Assert::equals(new Bytes($expected), new Bytes($actual));
-  }
-
-  #[Test]
-  public function singleWrite() {
-    $out= new MemoryOutputStream();
-    $compressor= $this->newStream($out, 6);
-    $compressor->write('Hello');
-    $compressor->close();
-    $this->assertCompressedDataEquals($this->compress('Hello', 6), $out->bytes());
-  }
-
-  #[Test]
-  public function multipeWrites() {
-    $out= new MemoryOutputStream();
-    $compressor= $this->newStream($out, 6);
-    $compressor->write('Hello');
-    $compressor->write(' ');
-    $compressor->write('World');
-    $compressor->close();
-    $this->assertCompressedDataEquals($this->compress('Hello World', 6), $out->bytes());
-  }
-
-  #[Test]
-  public function highestLevel() {
-    $out= new MemoryOutputStream();
-    $compressor= $this->newStream($out, 9);
-    $compressor->write('Hello');
-    $compressor->close();
-    $this->assertCompressedDataEquals($this->compress('Hello', 9), $out->bytes());
-  }
-
-  #[Test]
-  public function lowestLevel() {
-    $out= new MemoryOutputStream();
-    $compressor= $this->newStream($out, 1);
-    $compressor->write('Hello');
-    $compressor->close();
-    $this->assertCompressedDataEquals($this->compress('Hello', 1), $out->bytes());
-  }
-
-  #[Test, Expect(IllegalArgumentException::class)]
-  public function levelTooHigh() {
-    $this->newStream(new MemoryOutputStream() , 10);
-  }
- 
-  #[Test, Expect(IllegalArgumentException::class)]
-  public function levelTooLow() {
-    $this->newStream(new MemoryOutputStream(), -1);
-  }
-
-  #[Test]
-  public function closingRightAfterCreation() {
-    $compressor= $this->newStream(new MemoryOutputStream(), 1);
-    $compressor->close();
-  }
-
-  #[Test]
-  public function closingTwice() {
-    $compressor= $this->newStream(new MemoryOutputStream(), 1);
-    $compressor->close();
-    $compressor->close();
-  }
-}
\ No newline at end of file
diff --git a/src/test/php/io/unittest/AbstractDecompressingInputStreamTest.class.php b/src/test/php/io/unittest/AbstractDecompressingInputStreamTest.class.php
deleted file mode 100755
index c5bff128c..000000000
--- a/src/test/php/io/unittest/AbstractDecompressingInputStreamTest.class.php
+++ /dev/null
@@ -1,78 +0,0 @@
-<?php namespace io\unittest;
-
-use io\streams\{InputStream, MemoryInputStream};
-use test\{Assert, PrerequisitesNotMetError, Test};
-use util\Bytes;
-
-abstract class AbstractDecompressingInputStreamTest {
-
-  /**
-   * Get stream
-   *
-   * @param   io.streams.InputStream wrapped
-   * @return  io.streams.InputStream
-   */
-  protected abstract function newStream(InputStream $wrapped);
-
-  /**
-   * Compress data
-   *
-   * @param   string in
-   * @return  int level
-   * @return  string
-   */
-  protected abstract function compress($in, $level);
-
-  #[Test]
-  public function single_read() {
-    $in= new MemoryInputStream($this->compress('Hello', 6));
-    $decompressor= $this->newStream($in);
-    $chunk= $decompressor->read();
-    $decompressor->close();
-    Assert::equals('Hello', $chunk);
-  }
-
-  #[Test]
-  public function multiple_reads() {
-    $in= new MemoryInputStream($this->compress('Hello World', 6));
-    $decompressor= $this->newStream($in);
-    $chunk1= $decompressor->read(5);
-    $chunk2= $decompressor->read(1);
-    $chunk3= $decompressor->read(5);
-    $decompressor->close();
-    Assert::equals('Hello', $chunk1);
-    Assert::equals(' ', $chunk2);
-    Assert::equals('World', $chunk3);
-  }
-
-  #[Test]
-  public function highest_level() {
-    $in= new MemoryInputStream($this->compress('Hello', 9));
-    $decompressor= $this->newStream($in);
-    $chunk= $decompressor->read();
-    $decompressor->close();
-    Assert::equals('Hello', $chunk);
-  }
-
-  #[Test]
-  public function lowest_level() {
-    $in= new MemoryInputStream($this->compress('Hello', 1));
-    $decompressor= $this->newStream($in);
-    $chunk= $decompressor->read();
-    $decompressor->close();
-    Assert::equals('Hello', $chunk);
-  }
-
-  #[Test]
-  public function closing_right_after_creation() {
-    $decompressor= $this->newStream(new MemoryInputStream($this->compress('Hello', 1)));
-    $decompressor->close();
-  }
-
-  #[Test]
-  public function closing_twice_has_no_effect() {
-    $decompressor= $this->newStream(new MemoryInputStream($this->compress('Hello', 1)));
-    $decompressor->close();
-    $decompressor->close();
-  }
-}
\ No newline at end of file
diff --git a/src/test/php/io/unittest/Bz2CompressingOutputStreamTest.class.php b/src/test/php/io/unittest/Bz2CompressingOutputStreamTest.class.php
deleted file mode 100755
index 50702470d..000000000
--- a/src/test/php/io/unittest/Bz2CompressingOutputStreamTest.class.php
+++ /dev/null
@@ -1,30 +0,0 @@
-<?php namespace io\unittest;
-
-use io\streams\Bz2CompressingOutputStream;
-use test\verify\Condition;
-
-#[Condition(assert: 'in_array("bzip2.*", stream_get_filters())')]
-class Bz2CompressingOutputStreamTest extends AbstractCompressingOutputStreamTest {
-
-  /**
-   * Get stream
-   *
-   * @param   io.streams.OutputStream wrapped
-   * @return  int level
-   * @return  io.streams.OutputStream
-   */
-  protected function newStream(\io\streams\OutputStream $wrapped, $level) {
-    return new Bz2CompressingOutputStream($wrapped, $level);
-  }
-
-  /**
-   * Compress data
-   *
-   * @param   string in
-   * @return  int level
-   * @return  string
-   */
-  protected function compress($in, $level) {
-    return bzcompress($in, $level);
-  }
-}
\ No newline at end of file
diff --git a/src/test/php/io/unittest/Bz2DecompressingInputStreamTest.class.php b/src/test/php/io/unittest/Bz2DecompressingInputStreamTest.class.php
deleted file mode 100755
index 83b57e110..000000000
--- a/src/test/php/io/unittest/Bz2DecompressingInputStreamTest.class.php
+++ /dev/null
@@ -1,30 +0,0 @@
-<?php namespace io\unittest;
-
-use io\streams\Bz2DecompressingInputStream;
-use test\verify\Condition;
-
-#[Condition(assert: 'in_array("bzip2.*", stream_get_filters())')]
-class Bz2DecompressingInputStreamTest extends AbstractDecompressingInputStreamTest {
-
-  /**
-   * Get stream
-   *
-   * @param   io.streams.InputStream wrapped
-   * @return  int level
-   * @return  io.streams.InputStream
-   */
-  protected function newStream(\io\streams\InputStream $wrapped) {
-    return new Bz2DecompressingInputStream($wrapped);
-  }
-
-  /**
-   * Compress data
-   *
-   * @param   string in
-   * @return  int level
-   * @return  string
-   */
-  protected function compress($in, $level) {
-    return bzcompress($in, $level);
-  }
-}
\ No newline at end of file
diff --git a/src/test/php/io/unittest/DeflatingOutputStreamTest.class.php b/src/test/php/io/unittest/DeflatingOutputStreamTest.class.php
deleted file mode 100755
index b9f28d9c7..000000000
--- a/src/test/php/io/unittest/DeflatingOutputStreamTest.class.php
+++ /dev/null
@@ -1,33 +0,0 @@
-<?php namespace io\unittest;
-
-use io\streams\DeflatingOutputStream;
-use test\verify\Runtime;
-
-#[Runtime(extensions: ['zlib'])]
-class DeflatingOutputStreamTest extends AbstractCompressingOutputStreamTest {
-
-  /** @return string */
-  protected function filter() { return 'zlib.*'; }
-
-  /**
-   * Get stream
-   *
-   * @param   io.streams.OutputStream wrapped
-   * @return  int level
-   * @return  io.streams.OutputStream
-   */
-  protected function newStream(\io\streams\OutputStream $wrapped, $level) {
-    return new DeflatingOutputStream($wrapped, $level);
-  }
-
-  /**
-   * Compress data
-   *
-   * @param   string in
-   * @return  int level
-   * @return  string
-   */
-  protected function compress($in, $level) {
-    return gzdeflate($in, $level);
-  }
-}
\ No newline at end of file
diff --git a/src/test/php/io/unittest/GzCompressingOutputStreamTest.class.php b/src/test/php/io/unittest/GzCompressingOutputStreamTest.class.php
deleted file mode 100755
index 3e74f2d0d..000000000
--- a/src/test/php/io/unittest/GzCompressingOutputStreamTest.class.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php namespace io\unittest;
-
-use io\streams\GzCompressingOutputStream;
-use test\verify\Condition;
-
-#[Condition(assert: 'in_array("zlib.*", stream_get_filters())')]
-class GzCompressingOutputStreamTest extends AbstractCompressingOutputStreamTest {
-
-  /**
-   * Get stream
-   *
-   * @param   io.streams.OutputStream wrapped
-   * @return  int level
-   * @return  io.streams.OutputStream
-   */
-  protected function newStream(\io\streams\OutputStream $wrapped, $level) {
-    return new GzCompressingOutputStream($wrapped, $level);
-  }
-
-  /**
-   * Compress data
-   *
-   * @param   string in
-   * @return  int level
-   * @return  string
-   */
-  protected function compress($in, $level) {
-    return gzencode($in, $level);
-  }
-
-  /**
-   * Asserts GZ-encoded data equals. Ignores the first 10 bytes - the
-   * GZIP header, which will change every time due to current Un*x 
-   * timestamp being embedded therein.
-   *
-   * @param   string expected
-   * @param   string actual
-   * @throws  unittest.AssertionFailedError
-   */
-  protected function assertCompressedDataEquals($expected, $actual) {
-    parent::assertCompressedDataEquals(substr($expected, 10), substr($actual, 10));
-  }
-}
\ No newline at end of file
diff --git a/src/test/php/io/unittest/GzDecompressingInputStreamTest.class.php b/src/test/php/io/unittest/GzDecompressingInputStreamTest.class.php
deleted file mode 100755
index 37bfcbb87..000000000
--- a/src/test/php/io/unittest/GzDecompressingInputStreamTest.class.php
+++ /dev/null
@@ -1,51 +0,0 @@
-<?php namespace io\unittest;
-
-use io\streams\{GzDecompressingInputStream, InputStream, MemoryInputStream};
-use test\verify\Condition;
-use test\{Assert, Test, Values};
-
-#[Condition(assert: 'in_array("zlib.*", stream_get_filters())')]
-class GzDecompressingInputStreamTest extends AbstractDecompressingInputStreamTest {
-
-  /**
-   * Get stream
-   *
-   * @param   io.streams.InputStream $wrapped
-   * @return  int level
-   * @return  io.streams.InputStream
-   */
-  protected function newStream(InputStream $wrapped) {
-    return new GzDecompressingInputStream($wrapped);
-  }
-
-  /**
-   * Compress data
-   *
-   * @param   string $in
-   * @return  int $level
-   * @return  string
-   */
-  protected function compress($in, $level) {
-    return gzencode($in, $level);
-  }
-
-  /** @return var[][] */
-  private function dataWithFileName() {
-    return ["\x1F\x8B\x08\x08\x82\x86\xE0T\x00\x03test.txt\x00\xF3H\xCD\xC9\xC9\x07\x00\x82\x89\xD1\xF7\x05\x00\x00\x00"];
-  }
-
-  #[Test, Values(from: 'dataWithFileName')]
-  public function data_with_original_filename($data) {
-    $decompressor= $this->newStream(new MemoryInputStream($data));
-    $chunk= $decompressor->read();
-    $decompressor->close();
-    Assert::equals('Hello', $chunk);
-  }
-
-  #[Test, Values(from: 'dataWithFileName')]
-  public function header_with_original_filename($data) {
-    $decompressor= $this->newStream(new MemoryInputStream($data));
-    $decompressor->close();
-    Assert::equals('test.txt', $decompressor->header()['filename']);
-  }
-}
\ No newline at end of file
diff --git a/src/test/php/io/unittest/InflatingInputStreamTest.class.php b/src/test/php/io/unittest/InflatingInputStreamTest.class.php
deleted file mode 100755
index 12f2cd6a8..000000000
--- a/src/test/php/io/unittest/InflatingInputStreamTest.class.php
+++ /dev/null
@@ -1,33 +0,0 @@
-<?php namespace io\unittest;
-
-use io\streams\InflatingInputStream;
-use test\verify\Runtime;
-
-#[Runtime(extensions: ['zlib'])]
-class InflatingInputStreamTest extends AbstractDecompressingInputStreamTest {
-
-  /** @return string */
-  protected function filter() { return 'zlib.*'; }
-
-  /**
-   * Get stream
-   *
-   * @param   io.streams.InputStream wrapped
-   * @return  int level
-   * @return  io.streams.InputStream
-   */
-  protected function newStream(\io\streams\InputStream $wrapped) {
-    return new InflatingInputStream($wrapped);
-  }
-
-  /**
-   * Compress data
-   *
-   * @param   string in
-   * @return  int level
-   * @return  string
-   */
-  protected function compress($in, $level) {
-    return gzdeflate($in, $level);
-  }
-}
\ No newline at end of file