diff --git a/.eslintrc.js b/.eslintrc.js
index 2a227e5b9..a0fde4b80 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -15,6 +15,7 @@ module.exports = {
 		'prefer-arrow-callback': ['error'],
 		'arrow-parens': ['error'],
 		'arrow-spacing': ['error'],
-		'no-var': ['error']
+		'no-var': ['error'],
+		'prefer-const': ['error']
 	}
 };
diff --git a/examples/exception.php b/examples/exception.php
index c45729059..8b46f8e89 100644
--- a/examples/exception.php
+++ b/examples/exception.php
@@ -16,6 +16,7 @@
 <h1>Tracy: exception demo</h1>
 
 <?php
+$a++;
 
 class DemoClass
 {
diff --git a/src/Tracy/Bar/panels/errors.panel.phtml b/src/Tracy/Bar/panels/errors.panel.phtml
index 6041debc3..96883ddf7 100644
--- a/src/Tracy/Bar/panels/errors.panel.phtml
+++ b/src/Tracy/Bar/panels/errors.panel.phtml
@@ -6,11 +6,10 @@ namespace Tracy;
 
 /** @var int[] $data */
 ?>
-<h1>Errors</h1>
+<h1>Warnings</h1>
 
 <div class="tracy-inner">
 <table class="tracy-sortable">
-<tr><th>Count</th><th>Error</th></tr>
 <?php foreach ($data as $item => $count): [$file, $line, $message] = explode('|', $item, 3) ?>
 <tr>
 	<td class="tracy-right"><?= $count ? "$count\xC3\x97" : '' ?></td>
diff --git a/src/Tracy/Bar/panels/errors.tab.phtml b/src/Tracy/Bar/panels/errors.tab.phtml
index 839315fb1..70b0a53ed 100644
--- a/src/Tracy/Bar/panels/errors.tab.phtml
+++ b/src/Tracy/Bar/panels/errors.tab.phtml
@@ -21,5 +21,5 @@ if (empty($data)) {
 </style>
 <span class="tracy-ErrorTab">
 <svg viewBox="0 0 2048 2048"><path fill="#fff" d="M1152 1503v-190q0-14-9.5-23.5t-22.5-9.5h-192q-13 0-22.5 9.5t-9.5 23.5v190q0 14 9.5 23.5t22.5 9.5h192q13 0 22.5-9.5t9.5-23.5zm-2-374l18-459q0-12-10-19-13-11-24-11h-220q-11 0-24 11-10 7-10 21l17 457q0 10 10 16.5t24 6.5h185q14 0 23.5-6.5t10.5-16.5zm-14-934l768 1408q35 63-2 126-17 29-46.5 46t-63.5 17h-1536q-34 0-63.5-17t-46.5-46q-37-63-2-126l768-1408q17-31 47-49t65-18 65 18 47 49z"/>
-</svg><span class="tracy-label"><?= $sum = array_sum($data), $sum > 1 ? ' errors' : ' error' ?></span>
+</svg><span class="tracy-label"><?= $sum = array_sum($data), $sum > 1 ? ' warnings' : ' warning' ?></span>
 </span>
diff --git a/tests/Tracy/Debugger.warnings.html.phpt b/tests/Tracy/Debugger.warnings.html.phpt
index e94338b12..02aa82c3a 100644
--- a/tests/Tracy/Debugger.warnings.html.phpt
+++ b/tests/Tracy/Debugger.warnings.html.phpt
@@ -31,7 +31,6 @@ register_shutdown_function(function () {
 	$panelContent = (string) DomQuery::fromHtml($rawContent)->find('#tracy-debug-panel-Tracy-errors')[0]['data-tracy-content'];
 	Assert::match(<<<'XX'
 		%A%<table class="tracy-sortable">
-		<tr><th>Count</th><th>Error</th></tr>
 		<tr>
 			<td class="tracy-right">1%a%</td>
 			<td><pre>PHP Notice: Only variables should be assigned by reference in %a%:%d%</a></pre></td>