diff --git a/src/Extension/CoreExtension.php b/src/Extension/CoreExtension.php
index d114e6cf2c4..e3243a5e1ec 100644
--- a/src/Extension/CoreExtension.php
+++ b/src/Extension/CoreExtension.php
@@ -251,7 +251,7 @@ public function getTests(): array
             new TwigTest('divisible by', null, ['node_class' => DivisiblebyTest::class, 'one_mandatory_argument' => true]),
             new TwigTest('constant', null, ['node_class' => ConstantTest::class]),
             new TwigTest('empty', 'twig_test_empty'),
-            new TwigTest('iterable', 'twig_test_iterable'),
+            new TwigTest('iterable', 'is_iterable'),
         ];
     }
 
@@ -392,7 +392,7 @@ function twig_random(Environment $env, $values = null, $max = null)
         }
     }
 
-    if (!twig_test_iterable($values)) {
+    if (!is_iterable($values)) {
         return $values;
     }
 
@@ -529,7 +529,7 @@ function twig_date_converter(Environment $env, $date = null, $timezone = null)
  */
 function twig_replace_filter($str, $from)
 {
-    if (!twig_test_iterable($from)) {
+    if (!is_iterable($from)) {
         throw new RuntimeError(sprintf('The "replace" filter expects an array or "Traversable" as replace values, got "%s".', \is_object($from) ? \get_class($from) : \gettype($from)));
     }
 
@@ -626,7 +626,7 @@ function twig_array_merge(...$arrays)
     $result = [];
 
     foreach ($arrays as $argNumber => $array) {
-        if (!twig_test_iterable($array)) {
+        if (!is_iterable($array)) {
             throw new RuntimeError(sprintf('The merge filter only works with arrays or "Traversable", got "%s" for argument %d.', \gettype($array), $argNumber + 1));
         }
 
@@ -722,7 +722,7 @@ function twig_last(Environment $env, $item)
  */
 function twig_join_filter($value, $glue = '', $and = null)
 {
-    if (!twig_test_iterable($value)) {
+    if (!is_iterable($value)) {
         $value = (array) $value;
     }
 
@@ -1428,7 +1428,7 @@ function twig_constant_is_defined($constant, $object = null)
  */
 function twig_array_batch($items, $size, $fill = null, $preserveKeys = true)
 {
-    if (!twig_test_iterable($items)) {
+    if (!is_iterable($items)) {
         throw new RuntimeError(sprintf('The "batch" filter expects an array or "Traversable", got "%s".', \is_object($items) ? \get_class($items) : \gettype($items)));
     }
 
@@ -1672,7 +1672,7 @@ function twig_array_column($array, $name, $index = null): array
 
 function twig_array_filter(Environment $env, $array, $arrow)
 {
-    if (!twig_test_iterable($array)) {
+    if (!is_iterable($array)) {
         throw new RuntimeError(sprintf('The "filter" filter expects an array or "Traversable", got "%s".', \is_object($array) ? \get_class($array) : \gettype($array)));
     }
 
diff --git a/src/Node/WithNode.php b/src/Node/WithNode.php
index 56a334496e9..2ac9123d0d1 100644
--- a/src/Node/WithNode.php
+++ b/src/Node/WithNode.php
@@ -45,7 +45,7 @@ public function compile(Compiler $compiler): void
                 ->write(sprintf('$%s = ', $varsName))
                 ->subcompile($node)
                 ->raw(";\n")
-                ->write(sprintf("if (!twig_test_iterable(\$%s)) {\n", $varsName))
+                ->write(sprintf("if (!is_iterable(\$%s)) {\n", $varsName))
                 ->indent()
                 ->write("throw new RuntimeError('Variables passed to the \"with\" tag must be a hash.', ")
                 ->repr($node->getTemplateLine())