diff --git a/tests/PhpHandlerTest.php b/tests/PhpHandlerTest.php
index e1b068f8..e4fb3090 100644
--- a/tests/PhpHandlerTest.php
+++ b/tests/PhpHandlerTest.php
@@ -9,7 +9,7 @@ public function testGet()
     {
         $handler = static::$client->phpHandler()->get();
 
-        $this->assertObjectHasAttribute('type', $handler);
+        $this->assertTrue(property_exists($handler, 'type'));
     }
 
     public function testGetAll()
@@ -22,7 +22,7 @@ public function testGetAll()
         $handler = current($handlers);
 
         $this->assertIsObject($handler);
-        $this->assertObjectHasAttribute('type', $handler);
+        $this->assertTrue(property_exists($handler, 'type'));
     }
 
     public function testGetUnknownHandlerThrowsException()
diff --git a/tests/WebspaceTest.php b/tests/WebspaceTest.php
index fabe82fb..92edeb9d 100644
--- a/tests/WebspaceTest.php
+++ b/tests/WebspaceTest.php
@@ -26,7 +26,7 @@ public function testGetDiskUsage()
         $webspace = static::createWebspace();
         $diskusage = static::$client->webspace()->getDiskUsage('id', $webspace->id);
 
-        $this->assertObjectHasAttribute('httpdocs', $diskusage);
+        $this->assertTrue(property_exists($diskusage, 'httpdocs'));
 
         static::$client->webspace()->delete('id', $webspace->id);
     }