diff --git a/test/Loop/DriverTest.php b/test/Loop/DriverTest.php
index 7c14c05..73130a1 100644
--- a/test/Loop/DriverTest.php
+++ b/test/Loop/DriverTest.php
@@ -1307,7 +1307,7 @@ abstract class DriverTest extends TestCase
                 $loop->stop();
             });
         });
-        $this->assertTrue($t + 0.1 > \microtime(1));
+        $this->assertGreaterThan(\microtime(1), $t + 0.1);
     }
 
     public function testDeferEnabledInNextTick()
diff --git a/test/PromiseTest.php b/test/PromiseTest.php
index 75faa86..f1a165e 100644
--- a/test/PromiseTest.php
+++ b/test/PromiseTest.php
@@ -227,7 +227,7 @@ class PromiseTest extends \PHPUnit\Framework\TestCase
         if (!$ex) {
             $promise->onResolve(function ($e, $v) use (&$invoked) {
                 $invoked = true;
-                $this->assertFalse($v instanceof Promise);
+                $this->assertNotInstanceOf(Promise::class, $v);
             });
             $this->assertTrue($invoked);
         }