diff --git a/src/Generators/Markdown.php b/src/Generators/Markdown.php
index de207ec601..97e8717c1f 100644
--- a/src/Generators/Markdown.php
+++ b/src/Generators/Markdown.php
@@ -69,9 +69,10 @@ protected function printFooter()
     {
         // Turn off errors so we don't get timezone warnings if people
         // don't have their timezone set.
-        error_reporting(0);
+        $errorLevel = error_reporting(0);
         echo 'Documentation generated on '.date('r');
         echo ' by [PHP_CodeSniffer '.Config::VERSION.'](https://github.com/PHPCSStandards/PHP_CodeSniffer)'.PHP_EOL;
+        error_reporting($errorLevel);
 
     }//end printFooter()
 
diff --git a/tests/Core/Generators/HTMLTest.php b/tests/Core/Generators/HTMLTest.php
index 4140937ab7..211d8c446e 100644
--- a/tests/Core/Generators/HTMLTest.php
+++ b/tests/Core/Generators/HTMLTest.php
@@ -101,4 +101,32 @@ public function testFooter()
     }//end testFooter()
 
 
+    /**
+     * Safeguard that the footer logic doesn't permanently change the error level.
+     *
+     * @runInSeparateProcess
+     * @preserveGlobalState  disabled
+     *
+     * @return void
+     */
+    public function testFooterResetsErrorReportingToOriginalSetting()
+    {
+        $expected = error_reporting();
+
+        // Set up the ruleset.
+        $standard = __DIR__.'/OneDocTest.xml';
+        $config   = new ConfigDouble(["--standard=$standard"]);
+        $ruleset  = new Ruleset($config);
+
+        // We know there will be output, but we're not interested in the output for this test.
+        ob_start();
+        $generator = new HTMLDouble($ruleset);
+        $generator->printRealFooter();
+        ob_end_clean();
+
+        $this->assertSame($expected, error_reporting());
+
+    }//end testFooterResetsErrorReportingToOriginalSetting()
+
+
 }//end class
diff --git a/tests/Core/Generators/MarkdownTest.php b/tests/Core/Generators/MarkdownTest.php
index 9a3e540044..394b0ce5c1 100644
--- a/tests/Core/Generators/MarkdownTest.php
+++ b/tests/Core/Generators/MarkdownTest.php
@@ -99,4 +99,32 @@ public function testFooter()
     }//end testFooter()
 
 
+    /**
+     * Safeguard that the footer logic doesn't permanently change the error level.
+     *
+     * @runInSeparateProcess
+     * @preserveGlobalState  disabled
+     *
+     * @return void
+     */
+    public function testFooterResetsErrorReportingToOriginalSetting()
+    {
+        $expected = error_reporting();
+
+        // Set up the ruleset.
+        $standard = __DIR__.'/OneDocTest.xml';
+        $config   = new ConfigDouble(["--standard=$standard"]);
+        $ruleset  = new Ruleset($config);
+
+        // We know there will be output, but we're not interested in the output for this test.
+        ob_start();
+        $generator = new MarkdownDouble($ruleset);
+        $generator->printRealFooter();
+        ob_end_clean();
+
+        $this->assertSame($expected, error_reporting());
+
+    }//end testFooterResetsErrorReportingToOriginalSetting()
+
+
 }//end class