diff --git a/src/Generators/HTML.php b/src/Generators/HTML.php
index 4e63e4fc0a..7a8408f17a 100644
--- a/src/Generators/HTML.php
+++ b/src/Generators/HTML.php
@@ -164,6 +164,11 @@ public function generate()
      */
     protected function printHeader()
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedHeader()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedHeader();
 
     }//end printHeader()
@@ -208,6 +213,11 @@ protected function getFormattedHeader()
      */
     protected function printToc()
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedToc()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedToc();
 
     }//end printToc()
@@ -260,6 +270,11 @@ protected function getFormattedToc()
      */
     protected function printFooter()
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedFooter()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedFooter();
 
     }//end printFooter()
@@ -367,6 +382,11 @@ private function titleToAnchor($title)
      */
     protected function printTextBlock(DOMNode $node)
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedTextBlock()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedTextBlock($node);
 
     }//end printTextBlock()
@@ -437,6 +457,11 @@ protected function getFormattedTextBlock(DOMNode $node)
      */
     protected function printCodeComparisonBlock(DOMNode $node)
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedCodeComparisonBlock()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedCodeComparisonBlock($node);
 
     }//end printCodeComparisonBlock()
diff --git a/src/Generators/Markdown.php b/src/Generators/Markdown.php
index 112700e2e6..f73fcd935f 100644
--- a/src/Generators/Markdown.php
+++ b/src/Generators/Markdown.php
@@ -57,6 +57,11 @@ public function generate()
      */
     protected function printHeader()
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedHeader()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedHeader();
 
     }//end printHeader()
@@ -89,6 +94,11 @@ protected function getFormattedHeader()
      */
     protected function printFooter()
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedFooter()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedFooter();
 
     }//end printFooter()
@@ -157,6 +167,11 @@ protected function processSniff(DOMNode $doc)
      */
     protected function printTextBlock(DOMNode $node)
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedTextBlock()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedTextBlock($node);
 
     }//end printTextBlock()
@@ -225,6 +240,11 @@ protected function getFormattedTextBlock(DOMNode $node)
      */
     protected function printCodeComparisonBlock(DOMNode $node)
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedCodeComparisonBlock()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedCodeComparisonBlock($node);
 
     }//end printCodeComparisonBlock()
diff --git a/src/Generators/Text.php b/src/Generators/Text.php
index 4beb45abf1..5dae8c1ab2 100644
--- a/src/Generators/Text.php
+++ b/src/Generators/Text.php
@@ -62,6 +62,11 @@ public function processSniff(DOMNode $doc)
      */
     protected function printTitle(DOMNode $doc)
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedTitle()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedTitle($doc);
 
     }//end printTitle()
@@ -109,6 +114,11 @@ protected function getFormattedTitle(DOMNode $doc)
      */
     protected function printTextBlock(DOMNode $node)
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedTextBlock()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedTextBlock($node);
 
     }//end printTextBlock()
@@ -155,6 +165,11 @@ protected function getFormattedTextBlock(DOMNode $node)
      */
     protected function printCodeComparisonBlock(DOMNode $node)
     {
+        trigger_error(
+            'The '.__METHOD__.'() method is deprecated. Use "echo '.__CLASS__.'::getFormattedCodeComparisonBlock()" instead.',
+            E_USER_DEPRECATED
+        );
+
         echo $this->getFormattedCodeComparisonBlock($node);
 
     }//end printCodeComparisonBlock()
diff --git a/tests/Core/Generators/Fixtures/HTMLDouble.php b/tests/Core/Generators/Fixtures/HTMLDouble.php
index 8b737fb7c4..695c0c6d2f 100644
--- a/tests/Core/Generators/Fixtures/HTMLDouble.php
+++ b/tests/Core/Generators/Fixtures/HTMLDouble.php
@@ -37,4 +37,34 @@ public function getRealFooter()
     {
         return parent::getFormattedFooter();
     }
+
+    /**
+     * [VISIBILITY WIDENING ONLY] Print the header of the HTML page.
+     *
+     * @return void
+     */
+    public function printHeader()
+    {
+        parent::printHeader();
+    }
+
+    /**
+     * [VISIBILITY WIDENING ONLY] Print the table of contents for the standard.
+     *
+     * @return void
+     */
+    public function printToc()
+    {
+        parent::printToc();
+    }
+
+    /**
+     * [VISIBILITY WIDENING ONLY] Print the footer of the HTML page.
+     *
+     * @return void
+     */
+    public function printFooter()
+    {
+        parent::printFooter();
+    }
 }
diff --git a/tests/Core/Generators/Fixtures/MarkdownDouble.php b/tests/Core/Generators/Fixtures/MarkdownDouble.php
index e783f7dda7..79dc6b0bf2 100644
--- a/tests/Core/Generators/Fixtures/MarkdownDouble.php
+++ b/tests/Core/Generators/Fixtures/MarkdownDouble.php
@@ -35,4 +35,34 @@ public function getRealFooter()
     {
         return parent::getFormattedFooter();
     }
+
+    /**
+     * [VISIBILITY WIDENING ONLY] Print the header of the HTML page.
+     *
+     * @return void
+     */
+    public function printHeader()
+    {
+        parent::printHeader();
+    }
+
+    /**
+     * [VISIBILITY WIDENING ONLY] Print the table of contents for the standard.
+     *
+     * @return void
+     */
+    public function printToc()
+    {
+        parent::printToc();
+    }
+
+    /**
+     * [VISIBILITY WIDENING ONLY] Print the footer of the HTML page.
+     *
+     * @return void
+     */
+    public function printFooter()
+    {
+        parent::printFooter();
+    }
 }
diff --git a/tests/Core/Generators/HTMLTest.php b/tests/Core/Generators/HTMLTest.php
index a8ac84a8ab..91cd7d1e55 100644
--- a/tests/Core/Generators/HTMLTest.php
+++ b/tests/Core/Generators/HTMLTest.php
@@ -363,4 +363,64 @@ public function testFooterDoesntThrowWarningOnMissingTimezone()
     }//end testFooterDoesntThrowWarningOnMissingTimezone()
 
 
+    /**
+     * Perfunctory test to verify that extenders which call deprecated methods will see a deprecation notice.
+     *
+     * Note: not all deprecated methods are tested as some need arguments.
+     *
+     * @param string $methodName Name of the deprecated method to test.
+     *
+     * @dataProvider dataCallingDeprecatedMethodThrowsDeprecationNotice
+     *
+     * @return void
+     */
+    public function testCallingDeprecatedMethodThrowsDeprecationNotice($methodName)
+    {
+        $exceptionClass = 'PHPUnit\Framework\Error\Deprecated';
+        if (class_exists($exceptionClass) === false) {
+            $exceptionClass = 'PHPUnit_Framework_Error_Deprecated';
+        }
+
+        $regex = '`^The PHP_CodeSniffer\\\\Generators\\\\HTML::%s\(\) method is deprecated\. Use "echo [^\s]+::%s\(\)" instead\.$`';
+        $regex = sprintf($regex, preg_quote($methodName, '`'), str_replace('print', 'getFormatted', $methodName));
+
+        if (method_exists($this, 'expectExceptionMessageMatches') === true) {
+            $this->expectException($exceptionClass);
+            $this->expectExceptionMessageMatches($regex);
+        } else if (method_exists($this, 'expectExceptionMessageRegExp') === true) {
+            // PHPUnit < 8.4.0.
+            $this->expectException($exceptionClass);
+            $this->expectExceptionMessageRegExp($regex);
+        } else {
+            // PHPUnit < 5.2.0.
+            $this->setExpectedExceptionRegExp($exceptionClass, $regex);
+        }
+
+        // Set up the ruleset.
+        $standard = __DIR__.'/OneDocTest.xml';
+        $config   = new ConfigDouble(["--standard=$standard"]);
+        $ruleset  = new Ruleset($config);
+
+        $generator = new HTMLDouble($ruleset);
+        $generator->$methodName();
+
+    }//end testCallingDeprecatedMethodThrowsDeprecationNotice()
+
+
+    /**
+     * Data provider.
+     *
+     * @return array<string, array<string, string>>
+     */
+    public static function dataCallingDeprecatedMethodThrowsDeprecationNotice()
+    {
+        return [
+            'printHeader()' => ['printHeader'],
+            'printToc()'    => ['printToc'],
+            'printFooter()' => ['printFooter'],
+        ];
+
+    }//end dataCallingDeprecatedMethodThrowsDeprecationNotice()
+
+
 }//end class
diff --git a/tests/Core/Generators/MarkdownTest.php b/tests/Core/Generators/MarkdownTest.php
index 6bc2c4fba2..f9fd47796b 100644
--- a/tests/Core/Generators/MarkdownTest.php
+++ b/tests/Core/Generators/MarkdownTest.php
@@ -335,4 +335,63 @@ public function testFooterDoesntThrowWarningOnMissingTimezone()
     }//end testFooterDoesntThrowWarningOnMissingTimezone()
 
 
+    /**
+     * Perfunctory test to verify that extenders which call deprecated methods will see a deprecation notice.
+     *
+     * Note: not all deprecated methods are tested as some need arguments.
+     *
+     * @param string $methodName Name of the deprecated method to test.
+     *
+     * @dataProvider dataCallingDeprecatedMethodThrowsDeprecationNotice
+     *
+     * @return void
+     */
+    public function testCallingDeprecatedMethodThrowsDeprecationNotice($methodName)
+    {
+        $exceptionClass = 'PHPUnit\Framework\Error\Deprecated';
+        if (class_exists($exceptionClass) === false) {
+            $exceptionClass = 'PHPUnit_Framework_Error_Deprecated';
+        }
+
+        $regex = '`^The PHP_CodeSniffer\\\\Generators\\\\Markdown::%s\(\) method is deprecated\. Use "echo [^\s]+::%s\(\)" instead\.$`';
+        $regex = sprintf($regex, preg_quote($methodName, '`'), str_replace('print', 'getFormatted', $methodName));
+
+        if (method_exists($this, 'expectExceptionMessageMatches') === true) {
+            $this->expectException($exceptionClass);
+            $this->expectExceptionMessageMatches($regex);
+        } else if (method_exists($this, 'expectExceptionMessageRegExp') === true) {
+            // PHPUnit < 8.4.0.
+            $this->expectException($exceptionClass);
+            $this->expectExceptionMessageRegExp($regex);
+        } else {
+            // PHPUnit < 5.2.0.
+            $this->setExpectedExceptionRegExp($exceptionClass, $regex);
+        }
+
+        // Set up the ruleset.
+        $standard = __DIR__.'/OneDocTest.xml';
+        $config   = new ConfigDouble(["--standard=$standard"]);
+        $ruleset  = new Ruleset($config);
+
+        $generator = new MarkdownDouble($ruleset);
+        $generator->$methodName();
+
+    }//end testCallingDeprecatedMethodThrowsDeprecationNotice()
+
+
+    /**
+     * Data provider.
+     *
+     * @return array<string, array<string, string>>
+     */
+    public static function dataCallingDeprecatedMethodThrowsDeprecationNotice()
+    {
+        return [
+            'printHeader()' => ['printHeader'],
+            'printFooter()' => ['printFooter'],
+        ];
+
+    }//end dataCallingDeprecatedMethodThrowsDeprecationNotice()
+
+
 }//end class