diff --git a/.gitattributes b/.gitattributes
index feb7aaf2cb..55b80223f7 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -3,7 +3,7 @@
 /.gitattributes export-ignore
 /.github export-ignore
 /.gitignore export-ignore
-/.php_cs.dist export-ignore
+/.php-cs-fixer.dist.php export-ignore
 /CHANGELOG.md merge=union
 /codecov.yml export-ignore
 /CONTRIBUTING.md export-ignore
diff --git a/.github/workflows/continuous-integration.yaml b/.github/workflows/continuous-integration.yaml
index 81d1dd5b26..c5424b6026 100644
--- a/.github/workflows/continuous-integration.yaml
+++ b/.github/workflows/continuous-integration.yaml
@@ -14,11 +14,11 @@ jobs:
           php-version: '7.2'
           coverage: 'none'
           extensions: 'json, mbstring, tokenizer'
-          tools: 'composer-normalize:2.13.3, php-cs-fixer:2.18.6'
+          tools: 'composer-normalize:2.13.3, php-cs-fixer:3.0.0'
 
       - name: 'Check PHP code'
         run: |
-          php-cs-fixer fix --diff --dry-run --allow-risky=yes --using-cache=false
+          php-cs-fixer fix --diff --dry-run --allow-risky=yes --using-cache=no
 
       - name: 'Check composer.json'
         run: |
diff --git a/.gitignore b/.gitignore
index a2fb7237ad..eb96a20d0b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,8 @@
 .DS_Store
 .idea
 *.iml
-.php_cs
-.php_cs.cache
+.php-cs-fixer.php
+.php-cs-fixer.cache
 .phpunit.result.cache
 
 cache.properties
diff --git a/.php_cs.dist b/.php-cs-fixer.dist.php
similarity index 73%
rename from .php_cs.dist
rename to .php-cs-fixer.dist.php
index fbcc8106f0..a55e148f20 100644
--- a/.php_cs.dist
+++ b/.php-cs-fixer.dist.php
@@ -1,10 +1,11 @@
 <?php
 
-$finder = PhpCsFixer\Finder::create()
-    ->in(['src/', 'tests/'])
+$finder = (new PhpCsFixer\Finder())
+    ->in(__DIR__.'/src')
+    ->in(__DIR__.'/tests')
 ;
 
-return PhpCsFixer\Config::create()
+return (new PhpCsFixer\Config())
     ->setFinder($finder)
     ->setRules([
         '@PHP71Migration' => true,
@@ -12,12 +13,12 @@
         '@PHPUnit75Migration:risky' => true,
         '@PSR2' => true,
         '@Symfony' => true,
-        'array_syntax' => ['syntax' => 'short'],
         'is_null' => true,
-        'list_syntax' => ['syntax' => 'short'],
         'method_argument_space' => ['on_multiline' => 'ensure_fully_multiline'],
         'native_constant_invocation' => true,
-        'native_function_invocation' => true,
+        'native_function_invocation' => [
+            'include' => ['@all'],
+        ],
         'no_alias_functions' => true,
         'no_useless_else' => true,
         'nullable_type_declaration_for_default_null_value' => true,
@@ -28,7 +29,7 @@
         'phpdoc_types_order' => ['null_adjustment' => 'always_last'],
         'static_lambda' => true,
         'ternary_to_null_coalescing' => true,
-        'visibility_required' => ['property', 'method', 'const'],
+        'visibility_required' => ['elements' => ['property', 'method', 'const']],
         'void_return' => true,
     ])
 ;
diff --git a/Makefile b/Makefile
index a1bf44baf3..1a64619d0b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 .PHONY: clean
 clean:
-	rm -fr tools vendor build composer.lock .php_cs.cache
+	rm -fr tools vendor build composer.lock .php-cs-fixer.cache
 
 tools/phive.phar:
 	mkdir tools; \
@@ -33,11 +33,11 @@ composer-update:
 install-tools: install-phpcs
 
 .PHONY: run-phpcs
-run-phpcs: composer-install install-phpcs
-	tools/php-cs-fixer.phar fix --dry-run --allow-risky=yes -v
+run-phpcs: install-phpcs
+	tools/php-cs-fixer.phar fix --diff --dry-run --allow-risky=yes -v
 
 .PHONY: fix-phpcs
-fix-phpcs: composer-install install-phpcs
+fix-phpcs: install-phpcs
 	tools/php-cs-fixer.phar fix --allow-risky=yes -v
 
 .PHONY: run-phpunit
diff --git a/phive.xml b/phive.xml
index 7a05d9aa9d..8da86fe416 100644
--- a/phive.xml
+++ b/phive.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phive xmlns="https://phar.io/phive">
-  <phar name="php-cs-fixer" version="^2.18" installed="2.18.6" location="./tools/php-cs-fixer.phar" copy="true"/>
+  <phar name="php-cs-fixer" version="^3.0" installed="3.0.0" location="./tools/php-cs-fixer.phar" copy="true"/>
   <phar name="php-coveralls" version="^2.2" installed="2.2.0" location="./tools/php-coveralls.phar" copy="true"/>
 </phive>
diff --git a/src/Aggregation/Range.php b/src/Aggregation/Range.php
index aa42b4f1cd..24de49879a 100644
--- a/src/Aggregation/Range.php
+++ b/src/Aggregation/Range.php
@@ -54,7 +54,7 @@ public function addRange($fromValue = null, $toValue = null, ?string $key = null
      */
     public function setKeyedResponse(bool $keyed = true): self
     {
-        trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s()" method is deprecated, use "setKeyed()" instead. It will be removed in 8.0.', __METHOD__);
+        \trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s()" method is deprecated, use "setKeyed()" instead. It will be removed in 8.0.', __METHOD__);
 
         return $this->setKeyed($keyed);
     }
diff --git a/src/Exception/ElasticsearchException.php b/src/Exception/ElasticsearchException.php
index 4b5ded5f1c..25cc827b7e 100644
--- a/src/Exception/ElasticsearchException.php
+++ b/src/Exception/ElasticsearchException.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Exception;
 
-trigger_deprecation('ruflin/elastica', '5.2.0', 'The "%s" class is deprecated, use "Elastica\Exception\ResponseException::getResponse()::getFullError()" instead. It will be removed in 8.0.', ElasticsearchException::class);
+\trigger_deprecation('ruflin/elastica', '5.2.0', 'The "%s" class is deprecated, use "Elastica\Exception\ResponseException::getResponse()::getFullError()" instead. It will be removed in 8.0.', ElasticsearchException::class);
 
 /**
  * Elasticsearch exception.
diff --git a/src/Exception/ResponseException.php b/src/Exception/ResponseException.php
index 9afa23fabf..a62b0724f3 100644
--- a/src/Exception/ResponseException.php
+++ b/src/Exception/ResponseException.php
@@ -59,7 +59,7 @@ public function getResponse(): Response
      */
     public function getElasticsearchException(): ElasticsearchException
     {
-        trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s()" method is deprecated, use "getResponse()::getFullError()" instead. It will be removed in 8.0.', __METHOD__);
+        \trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s()" method is deprecated, use "getResponse()::getFullError()" instead. It will be removed in 8.0.', __METHOD__);
 
         $response = $this->getResponse();
 
diff --git a/src/Index.php b/src/Index.php
index f66a8791fe..249232fe08 100644
--- a/src/Index.php
+++ b/src/Index.php
@@ -392,11 +392,11 @@ public function create(array $args = [], $options = null): Response
     {
         if (null === $options) {
             if (\func_num_args() >= 2) {
-                trigger_deprecation('ruflin/elastica', '7.1.0', 'Passing null as 2nd argument to "%s()" is deprecated, avoid passing this argument or pass an array instead. It will be removed in 8.0.', __METHOD__);
+                \trigger_deprecation('ruflin/elastica', '7.1.0', 'Passing null as 2nd argument to "%s()" is deprecated, avoid passing this argument or pass an array instead. It will be removed in 8.0.', __METHOD__);
             }
             $options = [];
         } elseif (\is_bool($options)) {
-            trigger_deprecation('ruflin/elastica', '7.1.0', 'Passing a bool as 2nd argument to "%s()" is deprecated, pass an array with the key "recreate" instead. It will be removed in 8.0.', __METHOD__);
+            \trigger_deprecation('ruflin/elastica', '7.1.0', 'Passing a bool as 2nd argument to "%s()" is deprecated, pass an array with the key "recreate" instead. It will be removed in 8.0.', __METHOD__);
             $options = ['recreate' => $options];
         } elseif (!\is_array($options)) {
             throw new \TypeError(\sprintf('Argument 2 passed to "%s()" must be of type array|bool|null, %s given.', __METHOD__, \is_object($options) ? \get_class($options) : \gettype($options)));
diff --git a/src/Processor/Append.php b/src/Processor/Append.php
index beb229ad1b..413972c65e 100644
--- a/src/Processor/Append.php
+++ b/src/Processor/Append.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Append::class, AppendProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Append::class, AppendProcessor::class);
 
 /**
  * Elastica Append Processor.
diff --git a/src/Processor/Attachment.php b/src/Processor/Attachment.php
index 0916f26fbb..e018ede760 100644
--- a/src/Processor/Attachment.php
+++ b/src/Processor/Attachment.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Attachment::class, AttachmentProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Attachment::class, AttachmentProcessor::class);
 
 /**
  * Elastica Attachment Processor.
diff --git a/src/Processor/Convert.php b/src/Processor/Convert.php
index 54d98e13bc..d2664c7e3c 100644
--- a/src/Processor/Convert.php
+++ b/src/Processor/Convert.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Convert::class, ConvertProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Convert::class, ConvertProcessor::class);
 
 /**
  * Elastica Convert Processor.
diff --git a/src/Processor/Date.php b/src/Processor/Date.php
index 9b35c17f8a..dd8bd623d1 100644
--- a/src/Processor/Date.php
+++ b/src/Processor/Date.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Date::class, DateProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Date::class, DateProcessor::class);
 
 /**
  * Elastica Date Processor.
diff --git a/src/Processor/DateIndexName.php b/src/Processor/DateIndexName.php
index 05a2236cc5..781c1442b8 100644
--- a/src/Processor/DateIndexName.php
+++ b/src/Processor/DateIndexName.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', DateIndexName::class, DateIndexNameProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', DateIndexName::class, DateIndexNameProcessor::class);
 
 /**
  * Elastica DateIndexName Processor.
diff --git a/src/Processor/DotExpander.php b/src/Processor/DotExpander.php
index 567cd72575..f6e5afda78 100644
--- a/src/Processor/DotExpander.php
+++ b/src/Processor/DotExpander.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', DotExpander::class, DotExpanderProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', DotExpander::class, DotExpanderProcessor::class);
 
 /**
  * Elastica DotExpander Processor.
diff --git a/src/Processor/Fail.php b/src/Processor/Fail.php
index 10b9a2b7ac..191fba4c96 100644
--- a/src/Processor/Fail.php
+++ b/src/Processor/Fail.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Fail::class, FailProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Fail::class, FailProcessor::class);
 
 /**
  * Elastica Fail Processor.
diff --git a/src/Processor/Join.php b/src/Processor/Join.php
index a212757a0a..07a49ad9e4 100644
--- a/src/Processor/Join.php
+++ b/src/Processor/Join.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Join::class, JoinProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Join::class, JoinProcessor::class);
 
 /**
  * Elastica Join Processor.
diff --git a/src/Processor/Json.php b/src/Processor/Json.php
index 0002982657..6de578cbb6 100644
--- a/src/Processor/Json.php
+++ b/src/Processor/Json.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Json::class, JsonProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Json::class, JsonProcessor::class);
 
 /**
  * Elastica Json Processor.
diff --git a/src/Processor/Kv.php b/src/Processor/Kv.php
index 19155626d5..c12ac709c8 100644
--- a/src/Processor/Kv.php
+++ b/src/Processor/Kv.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Kv::class, KvProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Kv::class, KvProcessor::class);
 
 /**
  * Elastica KV Processor.
diff --git a/src/Processor/Lowercase.php b/src/Processor/Lowercase.php
index f75d1c035b..c15cb29c04 100644
--- a/src/Processor/Lowercase.php
+++ b/src/Processor/Lowercase.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Lowercase::class, LowercaseProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Lowercase::class, LowercaseProcessor::class);
 
 /**
  * Elastica Lowercase Processor.
diff --git a/src/Processor/Remove.php b/src/Processor/Remove.php
index 4ee256df0d..88d5f99fef 100644
--- a/src/Processor/Remove.php
+++ b/src/Processor/Remove.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Remove::class, RemoveProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Remove::class, RemoveProcessor::class);
 
 /**
  * Elastica Remove Processor.
diff --git a/src/Processor/Rename.php b/src/Processor/Rename.php
index 136c722871..1a1e7cf8a8 100644
--- a/src/Processor/Rename.php
+++ b/src/Processor/Rename.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Rename::class, RenameProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Rename::class, RenameProcessor::class);
 
 /**
  * Elastica Rename Processor.
diff --git a/src/Processor/Set.php b/src/Processor/Set.php
index babb1a0a9e..abcc216219 100644
--- a/src/Processor/Set.php
+++ b/src/Processor/Set.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Set::class, SetProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Set::class, SetProcessor::class);
 
 /**
  * Elastica Set Processor.
diff --git a/src/Processor/Sort.php b/src/Processor/Sort.php
index f2dafbc30a..0bf9fa02f3 100644
--- a/src/Processor/Sort.php
+++ b/src/Processor/Sort.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Sort::class, SortProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Sort::class, SortProcessor::class);
 
 /**
  * Elastica Sort Processor.
diff --git a/src/Processor/Split.php b/src/Processor/Split.php
index 9037f1d897..59941c6376 100644
--- a/src/Processor/Split.php
+++ b/src/Processor/Split.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Split::class, SplitProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Split::class, SplitProcessor::class);
 
 /**
  * Elastica Split Processor.
diff --git a/src/Processor/Trim.php b/src/Processor/Trim.php
index 2695ebf168..07fc12e5f9 100644
--- a/src/Processor/Trim.php
+++ b/src/Processor/Trim.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Trim::class, TrimProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Trim::class, TrimProcessor::class);
 
 /**
  * Elastica Trim Processor.
diff --git a/src/Processor/Uppercase.php b/src/Processor/Uppercase.php
index 6376108600..cd9a71fe0e 100644
--- a/src/Processor/Uppercase.php
+++ b/src/Processor/Uppercase.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Processor;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Uppercase::class, UppercaseProcessor::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. It will be removed in 8.0.', Uppercase::class, UppercaseProcessor::class);
 
 /**
  * Elastica Uppercase Processor.
diff --git a/src/Query/Match.php b/src/Query/Match.php
index b60e73d33f..5e76eabc99 100644
--- a/src/Query/Match.php
+++ b/src/Query/Match.php
@@ -2,7 +2,7 @@
 
 namespace Elastica\Query;
 
-trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. "match" is a reserved keyword starting from PHP 8.0. It will be removed in 8.0.', Match::class, MatchQuery::class);
+\trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s" class is deprecated, use "%s" instead. "match" is a reserved keyword starting from PHP 8.0. It will be removed in 8.0.', Match::class, MatchQuery::class);
 
 /**
  * Match query.
diff --git a/src/QueryBuilder/DSL/Aggregation.php b/src/QueryBuilder/DSL/Aggregation.php
index b461afb1c0..1cbf335e4d 100644
--- a/src/QueryBuilder/DSL/Aggregation.php
+++ b/src/QueryBuilder/DSL/Aggregation.php
@@ -239,7 +239,7 @@ public function global(string $name): GlobalAggregation
      */
     public function global_agg(string $name): GlobalAggregation
     {
-        trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s()" method is deprecated, use "global()" instead. It will be removed in 8.0.', __METHOD__);
+        \trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s()" method is deprecated, use "global()" instead. It will be removed in 8.0.', __METHOD__);
 
         return $this->global($name);
     }
diff --git a/src/Transport/HttpAdapter.php b/src/Transport/HttpAdapter.php
index 83488519a8..c5d7a69704 100644
--- a/src/Transport/HttpAdapter.php
+++ b/src/Transport/HttpAdapter.php
@@ -15,7 +15,7 @@
 use Ivory\HttpAdapter\Message\Response as HttpAdapterResponse;
 use Ivory\HttpAdapter\Message\Stream\StringStream;
 
-trigger_deprecation('ruflin/elastica', '7.1.1', 'The "%s" class is deprecated. It will be removed in 8.0.', HttpAdapter::class);
+\trigger_deprecation('ruflin/elastica', '7.1.1', 'The "%s" class is deprecated. It will be removed in 8.0.', HttpAdapter::class);
 
 /**
  * @deprecated since version 7.1.1
diff --git a/src/Util.php b/src/Util.php
index 8bd91ad389..2b7060cad6 100644
--- a/src/Util.php
+++ b/src/Util.php
@@ -212,7 +212,7 @@ public static function convertDateTimeObject(\DateTime $dateTime, bool $includeT
      */
     public static function getParamName($class)
     {
-        trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s()" method is deprecated. It will be removed in 8.0.', __METHOD__);
+        \trigger_deprecation('ruflin/elastica', '7.1.0', 'The "%s()" method is deprecated. It will be removed in 8.0.', __METHOD__);
 
         if (\is_object($class)) {
             $class = \get_class($class);