diff --git a/tests/FunctionalResolverTest.php b/tests/FunctionalResolverTest.php
index fab08332..2e8690dd 100644
--- a/tests/FunctionalResolverTest.php
+++ b/tests/FunctionalResolverTest.php
@@ -183,8 +183,9 @@ public function testResolveShouldNotCauseGarbageReferencesWhenUsingInvalidNamese
         $factory = new Factory();
         $this->resolver = $factory->create('255.255.255.255');
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $promise = $this->resolver->resolve('google.com');
 
@@ -204,8 +205,9 @@ public function testResolveCachedShouldNotCauseGarbageReferencesWhenUsingInvalid
         $factory = new Factory();
         $this->resolver = $factory->createCached('255.255.255.255');
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $promise = $this->resolver->resolve('google.com');
 
@@ -225,8 +227,9 @@ public function testCancelResolveShouldNotCauseGarbageReferences()
         $factory = new Factory();
         $this->resolver = $factory->create('127.0.0.1');
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $promise = $this->resolver->resolve('google.com');
         $promise->cancel();
@@ -244,8 +247,9 @@ public function testCancelResolveCachedShouldNotCauseGarbageReferences()
         $factory = new Factory();
         $this->resolver = $factory->createCached('127.0.0.1');
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $promise = $this->resolver->resolve('google.com');
         $promise->cancel();
diff --git a/tests/Query/CoopExecutorTest.php b/tests/Query/CoopExecutorTest.php
index c43c273d..8fd191a8 100644
--- a/tests/Query/CoopExecutorTest.php
+++ b/tests/Query/CoopExecutorTest.php
@@ -229,8 +229,9 @@ public function testCancelQueryShouldNotCauseGarbageReferences()
         $base->expects($this->once())->method('query')->willReturn($deferred->promise());
         $connector = new CoopExecutor($base);
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $query = new Query('reactphp.org', Message::TYPE_A, Message::CLASS_IN);
 
diff --git a/tests/Query/FallbackExecutorTest.php b/tests/Query/FallbackExecutorTest.php
index 10735c3a..b0dc053c 100644
--- a/tests/Query/FallbackExecutorTest.php
+++ b/tests/Query/FallbackExecutorTest.php
@@ -184,8 +184,9 @@ public function testCancelQueryShouldNotCauseGarbageReferencesWhenCancellingPrim
 
         $executor = new FallbackExecutor($primary, $secondary);
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $query = new Query('reactphp.org', Message::TYPE_A, Message::CLASS_IN);
 
@@ -210,8 +211,9 @@ public function testCancelQueryShouldNotCauseGarbageReferencesWhenCancellingSeco
 
         $executor = new FallbackExecutor($primary, $secondary);
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $query = new Query('reactphp.org', Message::TYPE_A, Message::CLASS_IN);
 
diff --git a/tests/Query/RetryExecutorTest.php b/tests/Query/RetryExecutorTest.php
index 9de9c04b..93b46d50 100644
--- a/tests/Query/RetryExecutorTest.php
+++ b/tests/Query/RetryExecutorTest.php
@@ -226,8 +226,9 @@ public function queryShouldNotCauseGarbageReferencesOnSuccess()
 
         $retryExecutor = new RetryExecutor($executor, 0);
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $query = new Query('igor.io', Message::TYPE_A, Message::CLASS_IN);
         $retryExecutor->query($query);
@@ -254,8 +255,9 @@ public function queryShouldNotCauseGarbageReferencesOnTimeoutErrors()
 
         $retryExecutor = new RetryExecutor($executor, 0);
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $query = new Query('igor.io', Message::TYPE_A, Message::CLASS_IN);
         $promise = $retryExecutor->query($query);
@@ -288,8 +290,9 @@ public function queryShouldNotCauseGarbageReferencesOnCancellation()
 
         $retryExecutor = new RetryExecutor($executor, 0);
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $query = new Query('igor.io', Message::TYPE_A, Message::CLASS_IN);
         $promise = $retryExecutor->query($query);
@@ -320,8 +323,9 @@ public function queryShouldNotCauseGarbageReferencesOnNonTimeoutErrors()
 
         $retryExecutor = new RetryExecutor($executor, 2);
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $query = new Query('igor.io', Message::TYPE_A, Message::CLASS_IN);
         $promise = $retryExecutor->query($query);
diff --git a/tests/Query/SelectiveTransportExecutorTest.php b/tests/Query/SelectiveTransportExecutorTest.php
index 6b1cc35b..c38dbeb2 100644
--- a/tests/Query/SelectiveTransportExecutorTest.php
+++ b/tests/Query/SelectiveTransportExecutorTest.php
@@ -162,8 +162,9 @@ public function testCancelPromiseShouldNotCreateAnyGarbageReferences()
                 throw new \RuntimeException('Cancelled');
             }));
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $promise = $this->executor->query($query);
         $promise->cancel();
@@ -195,8 +196,9 @@ public function testCancelPromiseAfterTruncatedResponseShouldNotCreateAnyGarbage
                 throw new \RuntimeException('Cancelled');
             }));
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $promise = $this->executor->query($query);
         $deferred->reject(new \RuntimeException('', defined('SOCKET_EMSGSIZE') ? SOCKET_EMSGSIZE : 90));
@@ -222,8 +224,9 @@ public function testRejectedPromiseAfterTruncatedResponseShouldNotCreateAnyGarba
             ->with($query)
             ->willReturn(\React\Promise\reject(new \RuntimeException()));
 
-        gc_collect_cycles();
-        gc_collect_cycles(); // clear twice to avoid leftovers in PHP 7.4 with ext-xdebug and code coverage turned on
+        while (gc_collect_cycles()) {
+            // collect all garbage cycles
+        }
 
         $promise = $this->executor->query($query);