diff --git a/.github/workflows/benchmark-comment.yml b/.github/workflows/benchmark-comment.yml
index d5e90aa..64d079e 100644
--- a/.github/workflows/benchmark-comment.yml
+++ b/.github/workflows/benchmark-comment.yml
@@ -56,8 +56,11 @@ jobs:
 
             Comparison of `${{ steps.bench.outputs.head-ref }}` against `${{ steps.bench.outputs.base-ref }}` (`${{ steps.bench.outputs.base-sha }}`).
 
-            ```
+            <details>
+              <summary>Open to see the benchmark results</summary>
+
             ${{ steps.bench.outputs.result }}
-            ```
+
+            </details>
 
             <sub>Generated by phpbench against commit ${{ steps.bench.outputs.head-sha }}</sub>
diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 876a92d..446924e 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -39,7 +39,7 @@ jobs:
         run: |
           git checkout ${{ github.event.pull_request.head.sha }}
           composer install --no-interaction --prefer-dist --quiet
-          vendor/bin/phpbench run --tag=pr --store --ref=base --report=aggregate --progress=none 2>&1 | tee benchmark-result.txt || true
+          vendor/bin/phpbench run --tag=pr --store --ref=base --report=aggregate --progress=none --output=markdown | tee benchmark-result.txt || true
 
       - name: Prepare artifact
         run: |
diff --git a/phpbench.json b/phpbench.json
index d62e210..37f09ff 100644
--- a/phpbench.json
+++ b/phpbench.json
@@ -2,5 +2,8 @@
     "$schema": "./vendor/phpbench/phpbench/phpbench.schema.json",
     "runner.bootstrap": "vendor/autoload.php",
     "runner.path": "tests/Bench",
-    "runner.file_pattern": "*Bench.php"
+    "runner.file_pattern": "*Bench.php",
+    "core.extensions": [
+        "Tempest\\Highlight\\Tests\\Bench\\Extension\\MarkdownExtension"
+    ]
 }
diff --git a/tests/Bench/Extension/MarkdownExtension.php b/tests/Bench/Extension/MarkdownExtension.php
new file mode 100644
index 0000000..42cf9a4
--- /dev/null
+++ b/tests/Bench/Extension/MarkdownExtension.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tempest\Highlight\Tests\Bench\Extension;
+
+use PhpBench\DependencyInjection\Container;
+use PhpBench\DependencyInjection\ExtensionInterface;
+use PhpBench\Extension\ConsoleExtension;
+use PhpBench\Extension\ExpressionExtension;
+use PhpBench\Extension\ReportExtension;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+final class MarkdownExtension implements ExtensionInterface
+{
+    public function configure(OptionsResolver $resolver): void
+    {
+    }
+
+    public function load(Container $container): void
+    {
+        $container->register(MarkdownRenderer::class, function (Container $container) {
+            return new MarkdownRenderer(
+                $container->get(ConsoleExtension::SERVICE_OUTPUT_STD),
+                $container->get(ExpressionExtension::SERVICE_PLAIN_PRINTER),
+            );
+        }, [
+            ReportExtension::TAG_REPORT_RENDERER => [
+                'name' => 'markdown',
+            ],
+        ]);
+    }
+}
diff --git a/tests/Bench/Extension/MarkdownRenderer.php b/tests/Bench/Extension/MarkdownRenderer.php
new file mode 100644
index 0000000..51b1acf
--- /dev/null
+++ b/tests/Bench/Extension/MarkdownRenderer.php
@@ -0,0 +1,133 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tempest\Highlight\Tests\Bench\Extension;
+
+use PhpBench\Expression\Ast\Node;
+use PhpBench\Expression\Printer;
+use PhpBench\Registry\Config;
+use PhpBench\Report\Model\Reports;
+use PhpBench\Report\Model\Table;
+use PhpBench\Report\Model\TableRow;
+use PhpBench\Report\RendererInterface;
+use RuntimeException;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+final readonly class MarkdownRenderer implements RendererInterface
+{
+    public function __construct(
+        private OutputInterface $output,
+        private Printer $printer,
+    ) {
+    }
+
+    public function render(Reports $reports, Config $config): void
+    {
+        $content = $this->renderContent($reports);
+        $file = $config['file'];
+
+        if ($file === null) {
+            $this->output->write($content);
+
+            return;
+        }
+
+        $this->writeFile($file, $content);
+    }
+
+    public function configure(OptionsResolver $options): void
+    {
+        $options->setDefaults([
+            'file' => null,
+        ]);
+        $options->setAllowedTypes('file', ['null', 'string']);
+    }
+
+    private function renderContent(Reports $reports): string
+    {
+        $lines = [];
+
+        foreach ($reports->tables() as $table) {
+            array_push($lines, ...$this->renderTable($table));
+        }
+
+        return implode("\n", $lines) . "\n";
+    }
+
+    private function renderTable(Table $table): array
+    {
+        $lines = [];
+        $title = $table->title();
+
+        if ($title !== null && $title !== '') {
+            $lines[] = "## {$title}";
+            $lines[] = '';
+        }
+
+        $columns = $table->columnNames();
+
+        if ($columns === []) {
+            return $lines;
+        }
+
+        $lines[] = $this->renderRow($columns);
+        $lines[] = $this->renderSeparatorRow($columns);
+
+        foreach ($table as $row) {
+            $lines[] = $this->renderDataRow($row);
+        }
+
+        $lines[] = '';
+
+        return $lines;
+    }
+
+    private function renderRow(array $cells): string
+    {
+        return '| ' . implode(' | ', $cells) . ' |';
+    }
+
+    private function renderSeparatorRow(array $columns): string
+    {
+        return $this->renderRow(array_map(
+            fn (string $column): string => str_repeat('-', max(3, mb_strlen($column))),
+            $columns,
+        ));
+    }
+
+    private function renderDataRow(TableRow $row): string
+    {
+        $cells = array_map($this->formatCell(...), iterator_to_array($row));
+
+        return $this->renderRow($cells);
+    }
+
+    private function formatCell(Node $node): string
+    {
+        return str_replace('|', '\\|', trim($this->printer->print($node)));
+    }
+
+    private function writeFile(string $file, string $content): void
+    {
+        $this->createDirectory(dirname($file));
+
+        if (file_put_contents($file, $content) === false) {
+            throw new RuntimeException(sprintf('Could not write to file "%s"', $file));
+        }
+
+        $this->output->writeln("Written markdown report to: {$file}");
+    }
+
+    private function createDirectory(string $directory): void
+    {
+        if (is_dir($directory)) {
+            return;
+        }
+
+        if (! mkdir($directory, 0o777, true) && ! is_dir($directory)) {
+            throw new RuntimeException(sprintf('Could not create directory "%s"', $directory));
+        }
+    }
+}