core/includes/theme.inc                              | 2 +-
 core/modules/system/css/system.theme.css             | 8 ++++++++
 core/modules/system/templates/progress-bar.html.twig | 3 ++-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 2b06429..fd8fe7b 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -2582,7 +2582,7 @@ function drupal_common_theme() {
       'variables' => array('url' => NULL, 'title' => NULL)
     ),
     'progress_bar' => array(
-      'variables' => array('label' => NULL, 'percent' => NULL, 'message' => NULL),
+      'variables' => array('label' => NULL, 'percent' => NULL, 'message' => NULL, 'static' => NULL),
       'template' => 'progress-bar',
     ),
     'indentation' => array(
diff --git a/core/modules/system/css/system.theme.css b/core/modules/system/css/system.theme.css
index c8908b5..cc800d3 100644
--- a/core/modules/system/css/system.theme.css
+++ b/core/modules/system/css/system.theme.css
@@ -357,6 +357,14 @@ th.checkbox {
   transition: width 0.5s ease-out;
 }
 
+.progress__bar--static {
+  -webkit-animation: none;
+  -moz-animation: none;
+  -o-animation: none;
+  -ms-animation: none;
+  animation: none;
+}
+
 /**
  * Progress bar animations.
  */
diff --git a/core/modules/system/templates/progress-bar.html.twig b/core/modules/system/templates/progress-bar.html.twig
index 885a80f..f3dc378 100644
--- a/core/modules/system/templates/progress-bar.html.twig
+++ b/core/modules/system/templates/progress-bar.html.twig
@@ -9,6 +9,7 @@
  * - label: The label of the working task.
  * - percent: The percentage of the progress.
  * - message: A string containing information to be displayed.
+ * - static: If set, disable the progress bar animation.
  *
  * @ingroup themeable
  */
@@ -17,7 +18,7 @@
   {% if label %}
     <div class="progress__label">{{ label }}</div>
   {% endif %}
-  <div class="progress__track"><div class="progress__bar" style="width: {{ percent }}%"></div></div>
+  <div class="progress__track"><div class="progress__bar {% if static %}progress__bar--static{% endif %}" style="width: {{ percent }}%"></div></div>
   <div class="progress__percentage">{{ percent }}%</div>
   <div class="progress__description">{{ message }}</div>
 </div>