diff --git a/core/modules/datetime/src/Tests/DateTimeFieldTest.php b/core/modules/datetime/src/Tests/DateTimeFieldTest.php
index 14ad190..2c77203 100644
--- a/core/modules/datetime/src/Tests/DateTimeFieldTest.php
+++ b/core/modules/datetime/src/Tests/DateTimeFieldTest.php
@@ -738,7 +738,7 @@ function testInvalidField() {
       "{$field_name}[0][value][time]" => '12:00:00',
     );
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', 'Empty date value has been caught.');
+    $this->assertText(format_string('The %field_name date is invalid', array('%field_name' => $field_name)), 'Empty date value has been caught.');
 
     $date_value = 'aaaa-12-01';
     $edit = array(
@@ -746,7 +746,7 @@ function testInvalidField() {
       "{$field_name}[0][value][time]" => '00:00:00',
     );
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid year value %date has been caught.', array('%date' => $date_value)));
+    $this->assertText(format_string('The %field_name date is invalid', array('%field_name' => $field_name)), format_string('Invalid year value %date has been caught.', array('%date' => $date_value)));
 
     $date_value = '2012-75-01';
     $edit = array(
@@ -754,7 +754,7 @@ function testInvalidField() {
       "{$field_name}[0][value][time]" => '00:00:00',
     );
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid month value %date has been caught.', array('%date' => $date_value)));
+    $this->assertText(format_string('The %field_name date is invalid', array('%field_name' => $field_name)), format_string('Invalid month value %date has been caught.', array('%date' => $date_value)));
 
     $date_value = '2012-12-99';
     $edit = array(
@@ -762,7 +762,7 @@ function testInvalidField() {
       "{$field_name}[0][value][time]" => '00:00:00',
     );
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid day value %date has been caught.', array('%date' => $date_value)));
+    $this->assertText(format_string('The %field_name date is invalid', array('%field_name' => $field_name)), format_string('Invalid day value %date has been caught.', array('%date' => $date_value)));
 
     $date_value = '2012-12-01';
     $time_value = '';
@@ -771,7 +771,7 @@ function testInvalidField() {
       "{$field_name}[0][value][time]" => $time_value,
     );
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', 'Empty time value has been caught.');
+    $this->assertText(format_string('The %field_name date is invalid', array('%field_name' => $field_name)), 'Empty time value has been caught.');
 
     $date_value = '2012-12-01';
     $time_value = '49:00:00';
@@ -780,7 +780,7 @@ function testInvalidField() {
       "{$field_name}[0][value][time]" => $time_value,
     );
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid hour value %time has been caught.', array('%time' => $time_value)));
+    $this->assertText(format_string('The %field_name date is invalid', array('%field_name' => $field_name)), format_string('Invalid hour value %time has been caught.', array('%time' => $time_value)));
 
     $date_value = '2012-12-01';
     $time_value = '12:99:00';
@@ -789,7 +789,7 @@ function testInvalidField() {
       "{$field_name}[0][value][time]" => $time_value,
     );
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid minute value %time has been caught.', array('%time' => $time_value)));
+    $this->assertText(format_string('The %field_name date is invalid', array('%field_name' => $field_name)), format_string('Invalid minute value %time has been caught.', array('%time' => $time_value)));
 
     $date_value = '2012-12-01';
     $time_value = '12:15:99';
@@ -798,7 +798,7 @@ function testInvalidField() {
       "{$field_name}[0][value][time]" => $time_value,
     );
     $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText('date is invalid', format_string('Invalid second value %time has been caught.', array('%time' => $time_value)));
+    $this->assertText(format_string('The %field_name date is invalid', array('%field_name' => $field_name)), format_string('Invalid second value %time has been caught.', array('%time' => $time_value)));
   }
 
   /**