diff --git a/test/DelayedTest.php b/test/DelayedTest.php
index 1e6e77f..171bc7e 100644
--- a/test/DelayedTest.php
+++ b/test/DelayedTest.php
@@ -21,25 +21,6 @@ class DelayedTest extends AsyncTestCase
         $this->assertGreaterThanOrEqual($time - 1 /* 1ms grace period */, (\microtime(true) - $start) * 1000);
     }
 
-    public function testUnreference(): void
-    {
-        $time = 100;
-        $value = "test";
-
-        $promise = new Delayed($time, $value);
-        $promise->unreference();
-
-        $this->ignoreLoopWatchers();
-
-        $this->expectException(\FiberError::class);
-        $this->expectExceptionMessage("Scheduler ended");
-
-        await($promise);
-    }
-
-    /**
-     * @depends testUnreference
-     */
     public function testReference(): void
     {
         $time = 100;
diff --git a/test/WaitTest.php b/test/WaitTest.php
index f9b71c9..447d1c8 100644
--- a/test/WaitTest.php
+++ b/test/WaitTest.php
@@ -2,12 +2,9 @@
 
 namespace Amp\Test;
 
-use Amp\Deferred;
 use Amp\Delayed;
 use Amp\Failure;
-use Amp\Loop;
 use Amp\PHPUnit\AsyncTestCase;
-use Amp\PHPUnit\TestException;
 use Amp\Promise;
 use Amp\Success;
 use function Amp\call;
@@ -57,14 +54,6 @@ class WaitTest extends AsyncTestCase
         $this->assertSame($value, $result);
     }
 
-    public function testPromiseWithNoResolutionPathThrowsException(): void
-    {
-        $this->expectException(\FiberError::class);
-        $this->expectExceptionMessage("Scheduler ended");
-
-        Promise\wait((new Deferred)->promise());
-    }
-
     /**
      * @depends testWaitOnSuccessfulPromise
      */