diff --git a/test/Fixtures.php b/test/Fixtures.php
index 71f1d76..df12244 100644
--- a/test/Fixtures.php
+++ b/test/Fixtures.php
@@ -9,11 +9,9 @@
 
 namespace danog\Loop\Test;
 
-use Amp\Future;
 use Amp\PHPUnit\AsyncTestCase;
 use danog\Loop\Test\Interfaces\BasicInterface;
 
-use function Amp\async;
 use function Amp\delay;
 
 /**
@@ -22,13 +20,6 @@ use function Amp\delay;
 abstract class Fixtures extends AsyncTestCase
 {
     const LOOP_NAME = 'TTTT';
-    /**
-     * Check if promise has been resolved afterwards.
-     */
-    protected static function isResolved(Future $promise): bool
-    {
-        return $promise->isComplete();
-    }
     /**
      * Execute pre-start assertions.
      *
@@ -52,11 +43,14 @@ abstract class Fixtures extends AsyncTestCase
      *
      * @param BasicInterface $loop    Loop
      * @param bool           $running Whether we should expect the loop to be running
+     * @param bool           $running Whether we should actually start the loop by returning control to the event loop
      *
      */
-    protected function assertAfterStart(BasicInterface $loop, bool $running = true): void
+    protected function assertAfterStart(BasicInterface $loop, bool $running = true, bool $start = true): void
     {
-        delay(0.001);
+        if ($start) {
+            delay(0.001);
+        }
         $this->assertTrue($loop->inited());
 
         if ($running) {
diff --git a/test/LoopTest.php b/test/LoopTest.php
index f0de6a8..87c673f 100644
--- a/test/LoopTest.php
+++ b/test/LoopTest.php
@@ -43,13 +43,14 @@ class LoopTest extends Fixtures
     /**
      * Test basic exception in loop.
      *
-     * @param BasicInterface $loop Loop
      *
      *
      * @dataProvider provideBasicExceptions
      */
-    /*public function testException(BasicInterface $loop): void
+    public function testException(BasicInterface $loop): void
     {
+        $this->markTestSkipped();
+
         $this->expectException(\RuntimeException::class);
 
         $this->assertPreStart($loop);
@@ -61,7 +62,7 @@ class LoopTest extends Fixtures
 
         $this->assertEquals(1, $loop->startCounter());
         $this->assertEquals(1, $loop->endCounter());
-    }*/
+    }
 
     /**
      * Provide loop implementations.
diff --git a/test/ResumableTest.php b/test/ResumableTest.php
index 8c0e856..125586e 100644
--- a/test/ResumableTest.php
+++ b/test/ResumableTest.php
@@ -14,6 +14,7 @@ use danog\Loop\ResumableLoop;
 use danog\Loop\ResumableSignalLoop;
 use danog\Loop\Test\Interfaces\ResumableInterface;
 use danog\Loop\Test\Traits\Resumable;
+use Generator;
 
 use function Amp\delay;
 
@@ -37,7 +38,7 @@ class ResumableTest extends Fixtures
         $this->assertAfterStart($loop);
 
         delay(0.010);
-        $this->assertTrue(self::isResolved($paused));
+        $this->assertTrue($paused->isComplete());
         delay(0.1);
 
         $this->assertFinal($loop);
@@ -60,7 +61,7 @@ class ResumableTest extends Fixtures
         $this->assertTrue($loop->start());
 
         delay(0.001);
-        $this->assertFalse(self::isResolved($paused)); // Did not pause
+        $this->assertFalse($paused->isComplete()); // Did not pause
 
         // Invert the order as the afterTest assertions will begin the test anew
         $this->assertFinal($loop);
@@ -90,7 +91,7 @@ class ResumableTest extends Fixtures
         $this->assertAfterStart($loop);
 
         delay(0.001);
-        $this->assertTrue(self::isResolved($paused)); // Did pause
+        $this->assertTrue($paused->isComplete()); // Did pause
 
         $paused = $deferred ? $loop->resumeDefer() : $loop->resume();
         if ($deferred) {
@@ -100,7 +101,7 @@ class ResumableTest extends Fixtures
         $this->assertFinal($loop);
 
         delay(0.001);
-        $this->assertFalse(self::isResolved($paused)); // Did not pause again
+        $this->assertFalse($paused->isComplete()); // Did not pause again
     }
 
     /**
@@ -124,18 +125,22 @@ class ResumableTest extends Fixtures
         $this->assertAfterStart($loop);
 
         delay(0.001);
-        $this->assertTrue(self::isResolved($paused1)); // Did pause
-        $this->assertTrue(self::isResolved($paused2)); // Did pause
+        $this->assertTrue($paused1->isComplete()); // Did pause
+        $this->assertTrue($paused2->isComplete()); // Did pause
 
         $paused1 = $loop->resumeDeferOnce();
         $paused2 = $loop->resumeDeferOnce();
-        $this->assertAfterStart($loop);
+
+        $this->assertFalse($paused1->isComplete()); // Did not pause again
+        $this->assertFalse($paused2->isComplete()); // Did not pause again
+
+        $this->assertAfterStart($loop, true, false);
         delay(0.001);
         $this->assertFinal($loop);
 
         delay(0.001);
-        $this->assertFalse(self::isResolved($paused1)); // Did not pause again
-        $this->assertFalse(self::isResolved($paused2)); // Did not pause again
+        $this->assertFalse($paused1->isComplete()); // Did not pause again
+        $this->assertFalse($paused2->isComplete()); // Did not pause again
     }
 
     /**
@@ -160,14 +165,14 @@ class ResumableTest extends Fixtures
      *
      *
      */
-    public function provideResumableInterval(): void
+    public function provideResumableInterval(): Generator
     {
         foreach ([true, false] as $deferred) {
             foreach ([10000, null] as $interval) {
                 foreach ($this->provideResumable() as $params) {
                     $params[] = $interval;
                     $params[] = $deferred;
-                    $params;
+                    yield $params;
                 }
             }
         }