diff --git a/ChoiceList/LazyChoiceList.php b/ChoiceList/LazyChoiceList.php
index 227c6e8f50..e8e37b3595 100644
--- a/ChoiceList/LazyChoiceList.php
+++ b/ChoiceList/LazyChoiceList.php
@@ -83,7 +83,7 @@ public function getChoices()
             // We can safely invoke the {@link ChoiceLoaderInterface} assuming it has the list
             // in cache when the lazy list is already loaded
             if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
-                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class));
+                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
             }
 
             return $this->loadedList->getChoices();
@@ -106,7 +106,7 @@ public function getValues()
         if ($this->loaded) {
             // Check whether the loader has the same cache
             if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
-                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class));
+                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
             }
 
             return $this->loadedList->getValues();
@@ -129,7 +129,7 @@ public function getStructuredValues()
         if ($this->loaded) {
             // Check whether the loader has the same cache
             if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
-                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class));
+                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
             }
 
             return $this->loadedList->getStructuredValues();
@@ -152,7 +152,7 @@ public function getOriginalKeys()
         if ($this->loaded) {
             // Check whether the loader has the same cache
             if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
-                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class));
+                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
             }
 
             return $this->loadedList->getOriginalKeys();
@@ -175,7 +175,7 @@ public function getChoicesForValues(array $values)
         if ($this->loaded) {
             // Check whether the loader has the same cache
             if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
-                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class));
+                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
             }
 
             return $this->loadedList->getChoicesForValues($values);
@@ -192,7 +192,7 @@ public function getValuesForChoices(array $choices)
         if ($this->loaded) {
             // Check whether the loader has the same cache
             if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
-                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class));
+                @trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
             }
 
             return $this->loadedList->getValuesForChoices($choices);
diff --git a/Tests/SimpleFormTest.php b/Tests/SimpleFormTest.php
index d4d74c28d0..481817b412 100644
--- a/Tests/SimpleFormTest.php
+++ b/Tests/SimpleFormTest.php
@@ -314,6 +314,10 @@ public function testValidIfSubmittedAndDisabled()
         $this->assertTrue($form->isValid());
     }
 
+    /**
+     * @group legacy
+     * @requires function Symfony\Bridge\PhpUnit\ErrorAssert::assertDeprecationsAreTriggered
+     */
     public function testNotValidIfNotSubmitted()
     {
         ErrorAssert::assertDeprecationsAreTriggered(array('Call Form::isValid() with an unsubmitted form'), function () {