diff --git a/test/OAuth/OAuthTest.php b/test/OAuth/OAuthTest.php
index 4b640ced..5043808a 100644
--- a/test/OAuth/OAuthTest.php
+++ b/test/OAuth/OAuthTest.php
@@ -36,7 +36,7 @@ final class OAuthTest extends TestCase
         $PHPMailer = new PHPMailer(true);
         $reflection = new \ReflectionClass($PHPMailer);
         $property = $reflection->getProperty('oauth');
-        $property->setAccessible(true);
+        (\PHP_VERSION_ID < 80100) && $property->setAccessible(true);
         $property->setValue($PHPMailer, true);
         self::assertTrue($PHPMailer->getOAuth(), 'Initial value of oauth property is not true');
 
diff --git a/test/PHPMailer/FileIsAccessibleTest.php b/test/PHPMailer/FileIsAccessibleTest.php
index 8989643a..45f0837d 100644
--- a/test/PHPMailer/FileIsAccessibleTest.php
+++ b/test/PHPMailer/FileIsAccessibleTest.php
@@ -39,9 +39,9 @@ final class FileIsAccessibleTest extends TestCase
     public function testFileIsAccessible($input, $expected)
     {
         $reflMethod = new ReflectionMethod(PHPMailer::class, 'fileIsAccessible');
-        $reflMethod->setAccessible(true);
+        (\PHP_VERSION_ID < 80100) && $reflMethod->setAccessible(true);
         $result = $reflMethod->invoke(null, $input);
-        $reflMethod->setAccessible(false);
+        (\PHP_VERSION_ID < 80100) && $reflMethod->setAccessible(false);
 
         self::assertSame($expected, $result);
     }
@@ -91,9 +91,9 @@ final class FileIsAccessibleTest extends TestCase
         chmod($file, octdec('0'));
 
         $reflMethod = new ReflectionMethod(PHPMailer::class, 'fileIsAccessible');
-        $reflMethod->setAccessible(true);
+        (\PHP_VERSION_ID < 80100) && $reflMethod->setAccessible(true);
         $result = $reflMethod->invoke(null, $file);
-        $reflMethod->setAccessible(false);
+        (\PHP_VERSION_ID < 80100) && $reflMethod->setAccessible(false);
 
         // Reset to the default for git files before running assertions.
         chmod($file, octdec('644'));
diff --git a/test/PHPMailer/IsPermittedPathTest.php b/test/PHPMailer/IsPermittedPathTest.php
index 93823a44..f3f17537 100644
--- a/test/PHPMailer/IsPermittedPathTest.php
+++ b/test/PHPMailer/IsPermittedPathTest.php
@@ -35,9 +35,9 @@ final class IsPermittedPathTest extends TestCase
     public function testIsPermittedPath($input, $expected)
     {
         $reflMethod = new ReflectionMethod(PHPMailer::class, 'isPermittedPath');
-        $reflMethod->setAccessible(true);
+        (\PHP_VERSION_ID < 80100) && $reflMethod->setAccessible(true);
         $result = $reflMethod->invoke(null, $input);
-        $reflMethod->setAccessible(false);
+        (\PHP_VERSION_ID < 80100) && $reflMethod->setAccessible(false);
 
         self::assertSame($expected, $result);
     }
diff --git a/test/PHPMailer/LocalizationTest.php b/test/PHPMailer/LocalizationTest.php
index c67ce578..6347ac6a 100644
--- a/test/PHPMailer/LocalizationTest.php
+++ b/test/PHPMailer/LocalizationTest.php
@@ -423,9 +423,9 @@ final class LocalizationTest extends TestCase
         }
 
         $reflMethod = new ReflectionMethod($this->Mail, 'lang');
-        $reflMethod->setAccessible(true);
+        (\PHP_VERSION_ID < 80100) && $reflMethod->setAccessible(true);
         $result = $reflMethod->invoke($this->Mail, $input);
-        $reflMethod->setAccessible(false);
+        (\PHP_VERSION_ID < 80100) && $reflMethod->setAccessible(false);
 
         self::assertSame($expected, $result);
     }
diff --git a/test/PHPMailer/PHPMailerTest.php b/test/PHPMailer/PHPMailerTest.php
index 1cc9ba14..fb787504 100644
--- a/test/PHPMailer/PHPMailerTest.php
+++ b/test/PHPMailer/PHPMailerTest.php
@@ -253,7 +253,7 @@ EOT;
         $PHPMailer = new PHPMailer();
         $reflection = new \ReflectionClass($PHPMailer);
         $property = $reflection->getProperty('message_type');
-        $property->setAccessible(true);
+        (\PHP_VERSION_ID < 80100) && $property->setAccessible(true);
         $property->setValue($PHPMailer, 'inline');
         self::assertIsString($PHPMailer->createBody());