diff --git a/core/lib/Drupal/Core/Form/FormValidator.php b/core/lib/Drupal/Core/Form/FormValidator.php
index de9470a0fe..0674fc144f 100644
--- a/core/lib/Drupal/Core/Form/FormValidator.php
+++ b/core/lib/Drupal/Core/Form/FormValidator.php
@@ -335,7 +335,7 @@ protected function performRequiredValidation(&$elements, FormStateInterface &$fo
     }
 
     if (isset($elements['#options']) && isset($elements['#value'])) {
-      $error_message = 'The submitted value "%choice" in <strong>%name</strong> element is not allowed.';
+      $error_message = 'The submitted value %choice in %name element is not allowed.';
       $name = empty($elements['#title']) ? $elements['#parents'][0] : $elements['#title'];
       $message_arguments = ['%name' => $name];
       if ($elements['#type'] == 'select') {
diff --git a/core/modules/block/tests/src/FunctionalJavascript/BlockAddTest.php b/core/modules/block/tests/src/FunctionalJavascript/BlockAddTest.php
index f3c09c00ea..96f8cdace5 100644
--- a/core/modules/block/tests/src/FunctionalJavascript/BlockAddTest.php
+++ b/core/modules/block/tests/src/FunctionalJavascript/BlockAddTest.php
@@ -44,7 +44,7 @@ public function testBlockAddThemeSelector() {
     // Switch to a theme that doesn't contain the region selected above.
     $assert_session->selectExists('Theme')->selectOption('stark');
     $assert_session->assertWaitOnAjaxRequest();
-    $assert_session->pageTextNotContains('The submitted value "Pre-content" in Region element is not allowed.');
+    $assert_session->pageTextNotContains('The submitted value Pre-content in Region element is not allowed.');
     $assert_session->optionExists('Region', '- Select -');
   }
 
diff --git a/core/modules/comment/tests/src/Functional/CommentFieldsTest.php b/core/modules/comment/tests/src/Functional/CommentFieldsTest.php
index 4e2195d1a7..f00aec0894 100644
--- a/core/modules/comment/tests/src/Functional/CommentFieldsTest.php
+++ b/core/modules/comment/tests/src/Functional/CommentFieldsTest.php
@@ -165,7 +165,7 @@ public function testCommentFieldCreate() {
     $this->drupalGet('admin/config/people/accounts/fields/user.user.field_user_comment/storage');
     $this->submitForm($edit, 'Save field settings');
     // We should get an error message.
-    $this->assertSession()->pageTextContains('The submitted value "" in Comment type element is not allowed.');
+    $this->assertSession()->pageTextContains('The submitted value in Comment type element is not allowed.');
 
     // Create a comment type for users.
     $bundle = CommentType::create([
@@ -183,7 +183,7 @@ public function testCommentFieldCreate() {
     $this->drupalGet('admin/config/people/accounts/fields/user.user.field_user_comment/storage');
     $this->submitForm($edit, 'Save field settings');
     // We shouldn't get an error message.
-    $this->assertSession()->pageTextNotContains('The submitted value "" in Comment type element is not allowed.');
+    $this->assertSession()->pageTextNotContains('The submitted value in Comment type element is not allowed.');
   }
 
   /**
diff --git a/core/modules/system/tests/src/Functional/Form/FormTest.php b/core/modules/system/tests/src/Functional/Form/FormTest.php
index 0f084f5c37..2a37611483 100644
--- a/core/modules/system/tests/src/Functional/Form/FormTest.php
+++ b/core/modules/system/tests/src/Functional/Form/FormTest.php
@@ -886,7 +886,7 @@ public function testInputForgery() {
     // an input forgery.
     // @see \Drupal\form_test\Form\FormTestInputForgeryForm::postRender
     $this->submitForm(['checkboxes[one]' => TRUE, 'checkboxes[two]' => TRUE], 'Submit');
-    $this->assertSession()->pageTextContains('The submitted value "FORGERY" in Checkboxes element is not allowed.');
+    $this->assertSession()->pageTextContains('The submitted value FORGERY in Checkboxes element is not allowed.');
   }
 
   /**
diff --git a/core/modules/system/tests/src/Functional/Form/ValidationTest.php b/core/modules/system/tests/src/Functional/Form/ValidationTest.php
index 3c2a38da22..137e3d11ba 100644
--- a/core/modules/system/tests/src/Functional/Form/ValidationTest.php
+++ b/core/modules/system/tests/src/Functional/Form/ValidationTest.php
@@ -235,7 +235,7 @@ public function testCustomRequiredError() {
         $this->assertSession()->pageTextContains((string) $form[$key]['#form_test_required_error']);
       }
       if (isset($form[$key]['#title'])) {
-        $this->assertSession()->pageTextNotContains('The submitted value "" in ' . $form[$key]['#title'] . ' element is not allowed.');
+        $this->assertSession()->pageTextNotContains('The submitted value in ' . $form[$key]['#title'] . ' element is not allowed.');
       }
     }
 
@@ -258,7 +258,7 @@ public function testCustomRequiredError() {
         $this->assertSession()->pageTextNotContains((string) $form[$key]['#form_test_required_error']);
       }
       if (isset($form[$key]['#title'])) {
-        $this->assertSession()->pageTextNotContains('The submitted value "" in ' . $form[$key]['#title'] . ' element is not allowed.');
+        $this->assertSession()->pageTextNotContains('The submitted value in ' . $form[$key]['#title'] . ' element is not allowed.');
       }
     }
   }
diff --git a/core/modules/views/tests/src/Functional/Plugin/ExposedFormCheckboxesTest.php b/core/modules/views/tests/src/Functional/Plugin/ExposedFormCheckboxesTest.php
index 30bc014aab..0f5be03e3a 100644
--- a/core/modules/views/tests/src/Functional/Plugin/ExposedFormCheckboxesTest.php
+++ b/core/modules/views/tests/src/Functional/Plugin/ExposedFormCheckboxesTest.php
@@ -109,7 +109,7 @@ public function testExposedFormRenderCheckboxes() {
     // checked.
     $this->clickLink('Page 2');
     $this->assertSession()->elementsCount('xpath', "//div[contains(@class, 'views-row')]", 1);
-    $this->assertSession()->pageTextNotContains('The submitted value "" in type element is not allowed.');
+    $this->assertSession()->pageTextNotContains('The submitted value in type element is not allowed.');
   }
 
   /**
@@ -158,14 +158,14 @@ public function testExposedIsAllOfFilter() {
     // All rows are displayed by default on the first page when no options are
     // checked.
     $this->assertSession()->elementsCount('xpath', "//div[contains(@class, 'views-row')]", 8);
-    $this->assertSession()->pageTextNotContains('The submitted value "" in Reference Field element is not allowed.');
+    $this->assertSession()->pageTextNotContains('The submitted value in Reference Field element is not allowed.');
 
     // Select one option and ensure we still have results.
     $tid = $this->terms[0]->id();
     $this->submitForm(["tid[$tid]" => $tid], 'Apply');
     // Ensure only nodes tagged with $tid are displayed.
     $this->assertSession()->elementsCount('xpath', "//div[contains(@class, 'views-row')]", 2);
-    $this->assertSession()->pageTextNotContains('The submitted value "" in Reference Field element is not allowed.');
+    $this->assertSession()->pageTextNotContains('The submitted value in Reference Field element is not allowed.');
   }
 
 }
diff --git a/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php b/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php
index 5faa58b649..9252bc0d57 100644
--- a/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php
+++ b/core/tests/Drupal/Tests/Core/Form/FormValidatorTest.php
@@ -425,7 +425,7 @@ public function providerTestPerformRequiredValidation() {
           '#value' => 'baz',
           '#multiple' => FALSE,
         ],
-        new TranslatableMarkup('The submitted value "%choice" in <strong>%name</strong> element is not allowed.', ['%name' => 'Test', '%choice' => 'baz'], [], $this->getStringTranslationStub()),
+        new TranslatableMarkup('The submitted value %choice in %name element is not allowed.', ['%name' => 'Test', '%choice' => 'baz'], [], $this->getStringTranslationStub()),
         TRUE,
       ],
       [
@@ -438,7 +438,7 @@ public function providerTestPerformRequiredValidation() {
           '#value' => ['baz'],
           '#multiple' => TRUE,
         ],
-        new TranslatableMarkup('The submitted value "%choice" in <strong>%name</strong> element is not allowed.', ['%name' => 'Test', '%choice' => 0], [], $this->getStringTranslationStub()),
+        new TranslatableMarkup('The submitted value %choice in %name element is not allowed.', ['%name' => 'Test', '%choice' => 0], [], $this->getStringTranslationStub()),
         TRUE,
       ],
       [
@@ -451,7 +451,7 @@ public function providerTestPerformRequiredValidation() {
           '#value' => ['baz'],
           '#multiple' => TRUE,
         ],
-        new TranslatableMarkup('The submitted value "%choice" in <strong>%name</strong> element is not allowed.', ['%name' => 'Test', '%choice' => 'baz'], [], $this->getStringTranslationStub()),
+        new TranslatableMarkup('The submitted value %choice in %name element is not allowed.', ['%name' => 'Test', '%choice' => 'baz'], [], $this->getStringTranslationStub()),
         TRUE,
       ],
       [