diff --git a/tests/ConfigTest.php b/tests/ConfigTest.php
index 24c42f83..94456543 100644
--- a/tests/ConfigTest.php
+++ b/tests/ConfigTest.php
@@ -21,7 +21,7 @@ public function testConfig(): void
             'handlers' => [
                 'files' => [
                     'class'   => FileHandler::class,
-                    'options' => ['directory' => sys_get_temp_dir()],
+                    'options' => ['directory' => \sys_get_temp_dir()],
                 ],
             ],
         ]);
@@ -31,7 +31,7 @@ public function testConfig(): void
         self::assertSame(86400, $c->getLifetime());
         self::assertNull($c->getSameSite());
         self::assertEquals(new Autowire(FileHandler::class, [
-            'directory' => sys_get_temp_dir(),
+            'directory' => \sys_get_temp_dir(),
         ]), $c->getHandler());
     }
 
@@ -41,11 +41,11 @@ public function testConfigAutowired(): void
             'lifetime' => 86400,
             'cookie'   => 'SID',
             'secure'   => false,
-            'handler'  => new Autowire(FileHandler::class, ['directory' => sys_get_temp_dir()]),
+            'handler'  => new Autowire(FileHandler::class, ['directory' => \sys_get_temp_dir()]),
         ]);
 
         self::assertEquals(new Autowire(FileHandler::class, [
-            'directory' => sys_get_temp_dir(),
+            'directory' => \sys_get_temp_dir(),
         ]), $c->getHandler());
     }
 }
diff --git a/tests/FactoryTest.php b/tests/FactoryTest.php
index c3e68d59..cfe3a315 100644
--- a/tests/FactoryTest.php
+++ b/tests/FactoryTest.php
@@ -67,8 +67,8 @@ public function testMultipleSessions(): void
 
     protected function tearDown(): void
     {
-        if ((int) session_status() === PHP_SESSION_ACTIVE) {
-            session_abort();
+        if ((int) \session_status() === PHP_SESSION_ACTIVE) {
+            \session_abort();
         }
     }
 }
diff --git a/tests/SessionTest.php b/tests/SessionTest.php
index 39d4335a..b36f02b8 100644
--- a/tests/SessionTest.php
+++ b/tests/SessionTest.php
@@ -216,15 +216,15 @@ protected function setUp(): void
             'cookie'   => 'SID',
             'secure'   => false,
             'handler'  => new Container\Autowire(FileHandler::class, [
-                'directory' => sys_get_temp_dir(),
+                'directory' => \sys_get_temp_dir(),
             ]),
         ]), $this->container);
     }
 
     protected function tearDown(): void
     {
-        if ((int) session_status() === PHP_SESSION_ACTIVE) {
-            session_abort();
+        if ((int) \session_status() === PHP_SESSION_ACTIVE) {
+            \session_abort();
         }
     }
 }