diff --git a/src/Standards/Zend/Docs/Debug/CodeAnalyzerStandard.xml b/src/Standards/Zend/Docs/Debug/CodeAnalyzerStandard.xml
deleted file mode 100644
index c462b4f8ba..0000000000
--- a/src/Standards/Zend/Docs/Debug/CodeAnalyzerStandard.xml
+++ /dev/null
@@ -1,25 +0,0 @@
-<documentation title="Zend Code Analyzer">
-    <standard>
-    <![CDATA[
-    PHP Code should pass the zend code analyzer.
-    ]]>
-    </standard>
-    <code_comparison>
-        <code title="Valid: Valid PHP Code.">
-        <![CDATA[
-function foo($bar, $baz)
-{
-    return <em>$bar + $baz</em>;
-}
-        ]]>
-        </code>
-        <code title="Invalid: There is an unused function parameter.">
-        <![CDATA[
-function foo($bar, $baz)
-{
-    return <em>$bar + 2</em>;
-}
-        ]]>
-        </code>
-    </code_comparison>
-</documentation>
diff --git a/src/Standards/Zend/Sniffs/Debug/CodeAnalyzerSniff.php b/src/Standards/Zend/Sniffs/Debug/CodeAnalyzerSniff.php
deleted file mode 100644
index cb99d097ea..0000000000
--- a/src/Standards/Zend/Sniffs/Debug/CodeAnalyzerSniff.php
+++ /dev/null
@@ -1,100 +0,0 @@
-<?php
-/**
- * Runs the Zend Code Analyzer (from Zend Studio) on the file.
- *
- * @author    Holger Kral <holger.kral@zend.com>
- * @author    Greg Sherwood <gsherwood@squiz.net>
- * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
- * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
- *
- * @deprecated 3.9.0
- */
-
-namespace PHP_CodeSniffer\Standards\Zend\Sniffs\Debug;
-
-use PHP_CodeSniffer\Sniffs\Sniff;
-use PHP_CodeSniffer\Files\File;
-use PHP_CodeSniffer\Config;
-use PHP_CodeSniffer\Exceptions\RuntimeException;
-use PHP_CodeSniffer\Util\Common;
-
-class CodeAnalyzerSniff implements Sniff
-{
-
-
-    /**
-     * Returns the token types that this sniff is interested in.
-     *
-     * @return array<int|string>
-     */
-    public function register()
-    {
-        return [T_OPEN_TAG];
-
-    }//end register()
-
-
-    /**
-     * Processes the tokens that this sniff is interested in.
-     *
-     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where the token was found.
-     * @param int                         $stackPtr  The position in the stack where
-     *                                               the token was found.
-     *
-     * @return int
-     * @throws \PHP_CodeSniffer\Exceptions\RuntimeException If ZendCodeAnalyzer could not be run.
-     */
-    public function process(File $phpcsFile, $stackPtr)
-    {
-        $analyzerPath = Config::getExecutablePath('zend_ca');
-        if ($analyzerPath === null) {
-            return ($phpcsFile->numTokens + 1);
-        }
-
-        $fileName = $phpcsFile->getFilename();
-
-        // In the command, 2>&1 is important because the code analyzer sends its
-        // findings to stderr. $output normally contains only stdout, so using 2>&1
-        // will pipe even stderr to stdout.
-        $cmd = Common::escapeshellcmd($analyzerPath).' '.escapeshellarg($fileName).' 2>&1';
-
-        // There is the possibility to pass "--ide" as an option to the analyzer.
-        // This would result in an output format which would be easier to parse.
-        // The problem here is that no cleartext error messages are returned; only
-        // error-code-labels. So for a start we go for cleartext output.
-        $exitCode = exec($cmd, $output, $retval);
-
-        // Variable $exitCode is the last line of $output if no error occurs, on
-        // error it is numeric. Try to handle various error conditions and
-        // provide useful error reporting.
-        if (is_numeric($exitCode) === true && $exitCode > 0) {
-            if (is_array($output) === true) {
-                $msg = join('\n', $output);
-            }
-
-            throw new RuntimeException("Failed invoking ZendCodeAnalyzer, exitcode was [$exitCode], retval was [$retval], output was [$msg]");
-        }
-
-        if (is_array($output) === true) {
-            foreach ($output as $finding) {
-                // The first two lines of analyzer output contain
-                // something like this:
-                // > Zend Code Analyzer 1.2.2
-                // > Analyzing <filename>...
-                // So skip these...
-                $res = preg_match('/^.+\(line ([0-9]+)\):(.+)$/', $finding, $regs);
-                if (empty($regs) === true || $res === false) {
-                    continue;
-                }
-
-                $phpcsFile->addWarningOnLine(trim($regs[2]), $regs[1], 'ExternalTool');
-            }
-        }
-
-        // Ignore the rest of the file.
-        return ($phpcsFile->numTokens + 1);
-
-    }//end process()
-
-
-}//end class
diff --git a/src/Standards/Zend/Tests/Debug/CodeAnalyzerUnitTest.inc b/src/Standards/Zend/Tests/Debug/CodeAnalyzerUnitTest.inc
deleted file mode 100644
index c8d0499dd4..0000000000
--- a/src/Standards/Zend/Tests/Debug/CodeAnalyzerUnitTest.inc
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-function myFunction($variable) {
-    // $variable is unused.
-    echo 'hi';
-}
-?>
diff --git a/src/Standards/Zend/Tests/Debug/CodeAnalyzerUnitTest.php b/src/Standards/Zend/Tests/Debug/CodeAnalyzerUnitTest.php
deleted file mode 100644
index 82781a7d60..0000000000
--- a/src/Standards/Zend/Tests/Debug/CodeAnalyzerUnitTest.php
+++ /dev/null
@@ -1,71 +0,0 @@
-<?php
-/**
- * Unit test class for the CodeAnalyzer sniff.
- *
- * @author    Greg Sherwood <gsherwood@squiz.net>
- * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
- * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
- */
-
-namespace PHP_CodeSniffer\Standards\Zend\Tests\Debug;
-
-use PHP_CodeSniffer\Tests\Standards\AbstractSniffUnitTest;
-use PHP_CodeSniffer\Config;
-
-/**
- * Unit test class for the CodeAnalyzer sniff.
- *
- * @covers \PHP_CodeSniffer\Standards\Zend\Sniffs\Debug\CodeAnalyzerSniff
- */
-final class CodeAnalyzerUnitTest extends AbstractSniffUnitTest
-{
-
-
-    /**
-     * Should this test be skipped for some reason.
-     *
-     * @return bool
-     */
-    protected function shouldSkipTest()
-    {
-        $analyzerPath = Config::getExecutablePath('zend_ca');
-        if ($analyzerPath === null) {
-            return true;
-        }
-
-        return false;
-
-    }//end shouldSkipTest()
-
-
-    /**
-     * Returns the lines where errors should occur.
-     *
-     * The key of the array should represent the line number and the value
-     * should represent the number of errors that should occur on that line.
-     *
-     * @return array<int, int>
-     */
-    public function getErrorList()
-    {
-        return [];
-
-    }//end getErrorList()
-
-
-    /**
-     * Returns the lines where warnings should occur.
-     *
-     * The key of the array should represent the line number and the value
-     * should represent the number of warnings that should occur on that line.
-     *
-     * @return array<int, int>
-     */
-    public function getWarningList()
-    {
-        return [2 => 1];
-
-    }//end getWarningList()
-
-
-}//end class