diff --git a/samples/Basic/26_Utf8.php b/samples/Basic/26_Utf8.php
index 52a64509..52953251 100644
--- a/samples/Basic/26_Utf8.php
+++ b/samples/Basic/26_Utf8.php
@@ -12,10 +12,12 @@ $spreadsheet = $reader->load(__DIR__ . '/../templates/26template.xlsx');
 // at this point, we could do some manipulations with the template, but we skip this step
 $helper->write($spreadsheet, __FILE__, ['Xlsx', 'Xls', 'Html']);
 
-// Export to PDF (.pdf)
-$helper->log('Write to PDF format');
-IOFactory::registerWriter('Pdf', \PhpOffice\PhpSpreadsheet\Writer\Pdf\Dompdf::class);
-$helper->write($spreadsheet, __FILE__, ['Pdf']);
+if (\PHP_VERSION_ID < 80000) {
+    // Export to PDF (.pdf)
+    $helper->log('Write to PDF format');
+    IOFactory::registerWriter('Pdf', \PhpOffice\PhpSpreadsheet\Writer\Pdf\Dompdf::class);
+    $helper->write($spreadsheet, __FILE__, ['Pdf']);
+}
 
 // Remove first two rows with field headers before exporting to CSV
 $helper->log('Removing first two heading rows for CSV export');
diff --git a/samples/Pdf/21b_Pdf.php b/samples/Pdf/21b_Pdf.php
index c67ff3d2..6770b7c5 100644
--- a/samples/Pdf/21b_Pdf.php
+++ b/samples/Pdf/21b_Pdf.php
@@ -32,11 +32,13 @@ $spreadsheet->getActiveSheet()->setShowGridLines(false);
 $helper->log('Set orientation to landscape');
 $spreadsheet->getActiveSheet()->getPageSetup()->setOrientation(PageSetup::ORIENTATION_LANDSCAPE);
 
-$helper->log('Write to Dompdf');
-$writer = new Dompdf($spreadsheet);
-$filename = $helper->getFileName('21b_Pdf_dompdf.xlsx', 'pdf');
-$writer->setEditHtmlCallback('replaceBody');
-$writer->save($filename);
+if (\PHP_VERSION_ID < 80000) {
+    $helper->log('Write to Dompdf');
+    $writer = new Dompdf($spreadsheet);
+    $filename = $helper->getFileName('21b_Pdf_dompdf.xlsx', 'pdf');
+    $writer->setEditHtmlCallback('replaceBody');
+    $writer->save($filename);
+}
 
 $helper->log('Write to Mpdf');
 $writer = new Mpdf($spreadsheet);
@@ -44,8 +46,10 @@ $filename = $helper->getFileName('21b_Pdf_mpdf.xlsx', 'pdf');
 $writer->setEditHtmlCallback('replaceBody');
 $writer->save($filename);
 
-$helper->log('Write to Tcpdf');
-$writer = new Tcpdf($spreadsheet);
-$filename = $helper->getFileName('21b_Pdf_tcpdf.xlsx', 'pdf');
-$writer->setEditHtmlCallback('replaceBody');
-$writer->save($filename);
+if (\PHP_VERSION_ID < 80000) {
+    $helper->log('Write to Tcpdf');
+    $writer = new Tcpdf($spreadsheet);
+    $filename = $helper->getFileName('21b_Pdf_tcpdf.xlsx', 'pdf');
+    $writer->setEditHtmlCallback('replaceBody');
+    $writer->save($filename);
+}
\ No newline at end of file
diff --git a/tests/PhpSpreadsheetTests/Functional/StreamTest.php b/tests/PhpSpreadsheetTests/Functional/StreamTest.php
index dcca6b8a..3ca01fc4 100644
--- a/tests/PhpSpreadsheetTests/Functional/StreamTest.php
+++ b/tests/PhpSpreadsheetTests/Functional/StreamTest.php
@@ -10,16 +10,23 @@ class StreamTest extends TestCase
 {
     public function providerFormats(): array
     {
-        return [
+        $providerFormats = [
             ['Xls'],
             ['Xlsx'],
             ['Ods'],
             ['Csv'],
             ['Html'],
-            ['Tcpdf'],
-            ['Dompdf'],
             ['Mpdf'],
         ];
+
+        if (\PHP_VERSION_ID < 80000) {
+            $providerFormats = array_merge(
+                $providerFormats,
+                [['Tcpdf'],['Dompdf']]
+            );
+        }
+
+        return $providerFormats;
     }
 
     /**
diff --git a/tests/PhpSpreadsheetTests/Helper/SampleTest.php b/tests/PhpSpreadsheetTests/Helper/SampleTest.php
index eb729dc9..369b205e 100644
--- a/tests/PhpSpreadsheetTests/Helper/SampleTest.php
+++ b/tests/PhpSpreadsheetTests/Helper/SampleTest.php
@@ -31,6 +31,16 @@ class SampleTest extends TestCase
             'Chart/32_Chart_read_write_PDF.php', // Unfortunately JpGraph is not up to date for latest PHP and raise many warnings
             'Chart/32_Chart_read_write_HTML.php', // idem
         ];
+        // TCPDF and DomPDF libraries don't support PHP8 yet
+        if (\PHP_VERSION_ID >= 80000) {
+            $skipped = array_merge(
+                $skipped,
+                [
+                    'Pdf/21_Pdf_Domdf.php',
+                    'Pdf/21_Pdf_TCPDF.php',
+                ]
+            );
+        }
 
         // Unfortunately some tests are too long be ran with code-coverage
         // analysis on Travis, so we need to exclude them