diff --git a/src/CurlHttpMessage/CurlReqRes.php b/src/CurlHttpMessage/CurlReqRes.php
index 9887bbf7..912fa115 100644
--- a/src/CurlHttpMessage/CurlReqRes.php
+++ b/src/CurlHttpMessage/CurlReqRes.php
@@ -66,19 +66,19 @@ public function __construct(RequestInterface $request, callable $responseFactory
      */
     public function __destruct()
     {
-        if (\is_resource($this->curlHandle) && \get_resource_type($this->curlHandle) === 'Unknown') {
-            // already closed
-            $this->curlHandle = null;
+        if (!$this->curlHandle) {
             return;
         }
-        if ($this->curlHandle) {
-            try {
-                \curl_close($this->curlHandle);
-            } catch (ErrorException $e) {
-                // ignore exception
-            }
-            $this->curlHandle = null;
+        \set_error_handler(function ($type, $message) {
+            // ignore error
+        });
+        try {
+            \curl_close($this->curlHandle);
+        } catch (ErrorException $e) {
+            // ignore exception
         }
+        \restore_error_handler();
+        $this->curlHandle = null;
     }
 
     /**
diff --git a/tests/Backtrace/NormalizerTest.php b/tests/Backtrace/NormalizerTest.php
index 28cb56a7..f263b1eb 100644
--- a/tests/Backtrace/NormalizerTest.php
+++ b/tests/Backtrace/NormalizerTest.php
@@ -66,13 +66,11 @@ public function testNormalize()
 
     public function testNormalizeInclude()
     {
-        $GLOBALS['gautf'] = true;
         $filepath = __DIR__ . '/Fixture/include.php';
         require $filepath;
 
         $this->assertIncludeDebugBacktrace($filepath);
         $this->assertIncludeXdebug($filepath);
-        $GLOBALS['gautf'] = false;
     }
 
     protected function assertIncludeDebugBacktrace($filepath)
@@ -111,9 +109,7 @@ protected function assertIncludeDebugBacktrace($filepath)
     protected function assertIncludeXdebug($filepath)
     {
         $trace = \array_reverse($GLOBALS['xdebug_trace']);
-        empty($GLOBALS['gautf']) || var_dump(\array_slice($trace, 0, 8));
         $trace = Normalizer::normalize($trace);
-        empty($GLOBALS['gautf']) || var_dump(\array_slice($trace, 0, 8));
 
         self::assertSame($filepath, $trace[0]['file']);
         self::assertSame('bdk\\Backtrace\\Xdebug::getFunctionStack', $trace[0]['function']);
diff --git a/tests/Debug/Collector/GuzzleMiddlewareTest.php b/tests/Debug/Collector/GuzzleMiddlewareTest.php
index f234e07b..f3eb4f57 100644
--- a/tests/Debug/Collector/GuzzleMiddlewareTest.php
+++ b/tests/Debug/Collector/GuzzleMiddlewareTest.php
@@ -225,19 +225,6 @@ public function testAsynchronous()
                             'channel' => 'general.Guzzle',
                         ),
                     ),
-                    /*
-                    3 => array(
-                        'method' => 'log',
-                        'args' => array(
-                            'request body',
-                            null,
-                        ),
-                        'meta' => array(
-                            'redact' => true,
-                            'channel' => 'general.Guzzle',
-                        ),
-                    ),
-                    */
                     3 => array(
                         'method' => 'groupEnd',
                         'args' => array(),
@@ -280,7 +267,7 @@ public function testAsynchronous()
                     ),
                 );
                 $this->assertSame($expect, $messages);
-            }
+            },
         ));
     }
 
diff --git a/tests/ErrorHandler/TestBase.php b/tests/ErrorHandler/TestBase.php
index 2159d731..c43d50c0 100644
--- a/tests/ErrorHandler/TestBase.php
+++ b/tests/ErrorHandler/TestBase.php
@@ -87,6 +87,13 @@ public function tearTown(): void
         $this->errorHandler->eventManager->unsubscribe(ErrorHandler::EVENT_ERROR, array($this, 'onError'));
     }
 
+    public static function tearDownAfterClass(): void
+    {
+        foreach (self::$subscribersBackup as $subscriberInfo) {
+            ErrorHandler::getInstance()->eventManager->subscribe(ErrorHandler::EVENT_ERROR, $subscriberInfo['callable'], $subscriberInfo['priority']);
+        }
+    }
+
     public function onError(Error $error)
     {
         foreach ($this->onErrorUpdate as $k => $v) {
@@ -110,8 +117,6 @@ public function onError(Error $error)
         }
         $error['continueToPrevHandler'] = true;
         $error['throw'] = true;
-
-
     }
 
     public function emailMock($to, $subject, $body, $addHeadersStr)