diff --git a/tests/system/Helpers/TextHelperTest.php b/tests/system/Helpers/TextHelperTest.php
index 4d0295e11d46..2af7f1387529 100755
--- a/tests/system/Helpers/TextHelperTest.php
+++ b/tests/system/Helpers/TextHelperTest.php
@@ -263,7 +263,13 @@ public function testCensoredWordsNonReplacement(): void
 
     public function testHighlightCode(): void
     {
-        $expect = "<code><span style=\"color: #000000\">\n<span style=\"color: #0000BB\">&lt;?php&nbsp;var_dump</span><span style=\"color: #007700\">(</span><span style=\"color: #0000BB\">\$this</span><span style=\"color: #007700\">);&nbsp;</span><span style=\"color: #0000BB\">?&gt;&nbsp;</span>\n</span>\n</code>";
+        // PHP 8.3 changes the output.
+        if (PHP_VERSION_ID >= 80300) {
+            $expect = '<pre><code style="color: #000000"><span style="color: #0000BB">&lt;?php var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$this</span><span style="color: #007700">); </span><span style="color: #0000BB">?&gt; ?&gt;</span></code></pre>';
+        } else {
+            $expect = "<code><span style=\"color: #000000\">\n<span style=\"color: #0000BB\">&lt;?php&nbsp;var_dump</span><span style=\"color: #007700\">(</span><span style=\"color: #0000BB\">\$this</span><span style=\"color: #007700\">);&nbsp;</span><span style=\"color: #0000BB\">?&gt;&nbsp;</span>\n</span>\n</code>";
+        }
+
         $this->assertSame($expect, highlight_code('<?php var_dump($this); ?>'));
     }
 
diff --git a/tests/system/View/ParserFilterTest.php b/tests/system/View/ParserFilterTest.php
index 7b41da6060fa..694f3252e539 100644
--- a/tests/system/View/ParserFilterTest.php
+++ b/tests/system/View/ParserFilterTest.php
@@ -181,6 +181,21 @@ public function testHighlightCode(): void
             </span>
             </code>
             EOF;
+
+        // PHP 8.3 changes the output.
+        if (PHP_VERSION_ID >= 80300) {
+            $expected = <<<'EOF'
+                <pre><code style="color: #000000"><span style="color: #0000BB">Sincerely ?&gt;</span></code></pre>
+                EOF;
+        } else {
+            $expected = <<<'EOF'
+                <code><span style="color: #000000">
+                <span style="color: #0000BB">Sincerely&nbsp;</span>
+                </span>
+                </code>
+                EOF;
+        }
+
         $this->assertSame($expected, $parser->renderString($template));
     }