diff --git a/src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_3_layout.html.twig b/src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_3_layout.html.twig
index d07fc67c58..e1164cdfbc 100644
--- a/src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_3_layout.html.twig
+++ b/src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_3_layout.html.twig
@@ -98,7 +98,7 @@
                 {% set label = name|humanize %}
             {%- endif -%}
         {%- endif -%}
-        <label{% for attrname, attrvalue in label_attr %} {{ attrname }}="{{ attrvalue }}"{% endfor %}>
+        <label{% with { attr: label_attr } %}{{ block('attributes') }}{% endwith %}>
             {{- widget|raw }} {{ label is not same as(false) ? (translation_domain is same as(false) ? label : label|trans({}, translation_domain)) -}}
         </label>
     {%- endif -%}
diff --git a/src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_4_layout.html.twig b/src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_4_layout.html.twig
index 8c6414895b..b13d7ed9ca 100644
--- a/src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_4_layout.html.twig
+++ b/src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_4_layout.html.twig
@@ -248,7 +248,7 @@
         {%- endif -%}
 
         {{ widget|raw }}
-        <label{% for attrname, attrvalue in label_attr %} {{ attrname }}="{{ attrvalue }}"{% endfor %}>
+        <label{% with { attr: label_attr } %}{{ block('attributes') }}{% endwith %}>
             {{- label is not same as(false) ? (translation_domain is same as(false) ? label : label|trans({}, translation_domain)) -}}
             {{- form_errors(form) -}}
         </label>
diff --git a/src/Symfony/Bridge/Twig/Resources/views/Form/form_div_layout.html.twig b/src/Symfony/Bridge/Twig/Resources/views/Form/form_div_layout.html.twig
index e2d70147b8..ad4477cba5 100644
--- a/src/Symfony/Bridge/Twig/Resources/views/Form/form_div_layout.html.twig
+++ b/src/Symfony/Bridge/Twig/Resources/views/Form/form_div_layout.html.twig
@@ -327,7 +327,7 @@
     {%- else -%}
         {% set form_method = "POST" %}
     {%- endif -%}
-    <form{% if name != '' %} name="{{ name }}"{% endif %} method="{{ form_method|lower }}"{% if action != '' %} action="{{ action }}"{% endif %}{% for attrname, attrvalue in attr %} {{ attrname }}="{{ attrvalue }}"{% endfor %}{% if multipart %} enctype="multipart/form-data"{% endif %}>
+    <form{% if name != '' %} name="{{ name }}"{% endif %} method="{{ form_method|lower }}"{% if action != '' %} action="{{ action }}"{% endif %}{{ block('attributes') }}{% if multipart %} enctype="multipart/form-data"{% endif %}>
     {%- if form_method != method -%}
         <input type="hidden" name="_method" value="{{ method }}" />
     {%- endif -%}
diff --git a/src/Symfony/Bridge/Twig/Resources/views/Form/foundation_5_layout.html.twig b/src/Symfony/Bridge/Twig/Resources/views/Form/foundation_5_layout.html.twig
index 058bb9714c..7876be3e43 100644
--- a/src/Symfony/Bridge/Twig/Resources/views/Form/foundation_5_layout.html.twig
+++ b/src/Symfony/Bridge/Twig/Resources/views/Form/foundation_5_layout.html.twig
@@ -258,7 +258,7 @@
             {% set label = name|humanize %}
         {%- endif -%}
     {% endif %}
-    <label{% for attrname, attrvalue in label_attr %} {{ attrname }}="{{ attrvalue }}"{% endfor %}>
+    <label{% with { attr: label_attr } %}{{ block('attributes') }}{% endwith %}>
         {{ widget|raw }}
         {{ translation_domain is same as(false) ? label : label|trans({}, translation_domain) }}
     </label>