diff --git a/.php_cs b/.php_cs
index 6bb579e08..19bc0d2e7 100644
--- a/.php_cs
+++ b/.php_cs
@@ -45,5 +45,6 @@ return PhpCsFixer\Config::create()
         'strict_comparison' => true,
         'strict_param' => true,
         'yoda_style' => false,
+        'native_function_invocation' => false,
     ])
     ->setFinder($finder);
diff --git a/src/ContainerBuilder.php b/src/ContainerBuilder.php
index 9b8799ebf..94676a2d7 100644
--- a/src/ContainerBuilder.php
+++ b/src/ContainerBuilder.php
@@ -306,24 +306,26 @@ public function wrapContainer(ContainerInterface $otherContainer) : self
     /**
      * Add definitions to the container.
      *
-     * @param string|array|DefinitionSource $definitions Can be an array of definitions, the
-     *                                                   name of a file containing definitions
-     *                                                   or a DefinitionSource object.
+     * @param string|array|DefinitionSource ...$definitions Can be an array of definitions, the
+     *                                                      name of a file containing definitions
+     *                                                      or a DefinitionSource object.
      * @return $this
      */
-    public function addDefinitions($definitions) : self
+    public function addDefinitions(...$definitions) : self
     {
         $this->ensureNotLocked();
 
-        if (!is_string($definitions) && !is_array($definitions) && !($definitions instanceof DefinitionSource)) {
-            throw new InvalidArgumentException(sprintf(
-                '%s parameter must be a string, an array or a DefinitionSource object, %s given',
-                'ContainerBuilder::addDefinitions()',
-                is_object($definitions) ? get_class($definitions) : gettype($definitions)
-            ));
-        }
+        foreach ($definitions as $definition) {
+            if (!is_string($definition) && !is_array($definition) && !($definition instanceof DefinitionSource)) {
+                throw new InvalidArgumentException(sprintf(
+                    '%s parameter must be a string, an array or a DefinitionSource object, %s given',
+                    'ContainerBuilder::addDefinitions()',
+                    is_object($definition) ? get_class($definition) : gettype($definition)
+                ));
+            }
 
-        $this->definitionSources[] = $definitions;
+            $this->definitionSources[] = $definition;
+        }
 
         return $this;
     }
diff --git a/tests/UnitTest/ContainerBuilderTest.php b/tests/UnitTest/ContainerBuilderTest.php
index 53626aa6a..9874d4526 100644
--- a/tests/UnitTest/ContainerBuilderTest.php
+++ b/tests/UnitTest/ContainerBuilderTest.php
@@ -94,8 +94,7 @@ public function should_allow_to_add_custom_definition_sources()
         $builder = new ContainerBuilder(FakeContainer::class);
 
         // Custom definition sources should be chained correctly
-        $builder->addDefinitions(new DefinitionArray(['foo' => 'bar']));
-        $builder->addDefinitions(new DefinitionArray(['foofoo' => 'barbar']));
+        $builder->addDefinitions(new DefinitionArray(['foo' => 'bar']), new DefinitionArray(['foofoo' => 'barbar']));
 
         /** @var FakeContainer $container */
         $container = $builder->build();
@@ -117,8 +116,7 @@ public function should_chain_definition_sources_in_reverse_order()
     {
         $builder = new ContainerBuilder(FakeContainer::class);
 
-        $builder->addDefinitions(new DefinitionArray(['foo' => 'bar']));
-        $builder->addDefinitions(new DefinitionArray(['foo' => 'bim']));
+        $builder->addDefinitions(new DefinitionArray(['foo' => 'bar']), new DefinitionArray(['foo' => 'bim']));
 
         /** @var FakeContainer $container */
         $container = $builder->build();
@@ -136,8 +134,7 @@ public function should_allow_to_add_definitions_in_an_array()
         $builder = new ContainerBuilder(FakeContainer::class);
 
         // Custom definition sources should be chained correctly
-        $builder->addDefinitions(['foo' => 'bar']);
-        $builder->addDefinitions(['foofoo' => 'barbar']);
+        $builder->addDefinitions(['foo' => 'bar'], ['foofoo' => 'barbar']);
 
         /** @var FakeContainer $container */
         $container = $builder->build();