diff --git a/core/modules/system/lib/Drupal/system/Tests/Common/HttpRequestTest.php b/core/modules/system/lib/Drupal/system/Tests/Common/HttpRequestTest.php
index 39f84d6..de7aba4 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Common/HttpRequestTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Common/HttpRequestTest.php
@@ -45,7 +45,7 @@ class HttpRequestTest extends WebTestBase {
 
     // Test that code and status message is returned.
     $result = drupal_http_request(url('pagedoesnotexist', array('absolute' => TRUE)));
-    $this->assertTrue(!empty($result->protocol),  'Result protocol is returned.');
+    $this->assertTrue(!empty($result->protocol), 'Result protocol is returned.');
     $this->assertEqual($result->code, '404', 'Result code is 404');
     $this->assertEqual($result->status_message, 'Not Found', 'Result status message is "Not Found"');
 
diff --git a/core/modules/system/lib/Drupal/system/Tests/Menu/TreeDataUnitTest.php b/core/modules/system/lib/Drupal/system/Tests/Menu/TreeDataUnitTest.php
index 4a013ea..8c97e1b 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Menu/TreeDataUnitTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Menu/TreeDataUnitTest.php
@@ -60,6 +60,6 @@ class TreeDataUnitTest extends UnitTestBase {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertSameLink($link1, $link2, $message = '') {
-    return $this->assert($link1['mlid'] == $link2['mlid'], $message ? $message : 'First link is identical to second link');
+    return $this->assert($link1['mlid'] == $link2['mlid'], $message ? $message : t('First link is identical to second link'));
   }
 }
diff --git a/core/modules/system/lib/Drupal/system/Tests/Theme/TableTest.php b/core/modules/system/lib/Drupal/system/Tests/Theme/TableTest.php
index 392959d..d2a0e5b 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Theme/TableTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Theme/TableTest.php
@@ -30,7 +30,7 @@ class TableTest extends WebTestBase {
     $this->content = theme('table', array('header' => $header, 'rows' => $rows));
     $js = drupal_add_js();
     $this->assertTrue(isset($js['core/misc/tableheader.js']), 'tableheader.js was included when $sticky = TRUE.');
-    $this->assertRaw('sticky-enabled',  'Table has a class of sticky-enabled when $sticky = TRUE.');
+    $this->assertRaw('sticky-enabled', 'Table has a class of sticky-enabled when $sticky = TRUE.');
     drupal_static_reset('drupal_add_js');
   }
 
@@ -46,7 +46,7 @@ class TableTest extends WebTestBase {
     $this->content = theme('table', array('header' => $header, 'rows' => $rows, 'attributes' => $attributes, 'caption' => $caption, 'colgroups' => $colgroups, 'sticky' => FALSE));
     $js = drupal_add_js();
     $this->assertFalse(isset($js['core/misc/tableheader.js']), 'tableheader.js was not included because $sticky = FALSE.');
-    $this->assertNoRaw('sticky-enabled',  'Table does not have a class of sticky-enabled because $sticky = FALSE.');
+    $this->assertNoRaw('sticky-enabled', 'Table does not have a class of sticky-enabled because $sticky = FALSE.');
     drupal_static_reset('drupal_add_js');
   }
 
diff --git a/core/modules/update/lib/Drupal/update/Tests/UpdateContribTest.php b/core/modules/update/lib/Drupal/update/Tests/UpdateContribTest.php
index 052c2aa..aaf485c 100644
--- a/core/modules/update/lib/Drupal/update/Tests/UpdateContribTest.php
+++ b/core/modules/update/lib/Drupal/update/Tests/UpdateContribTest.php
@@ -300,7 +300,7 @@ class UpdateContribTest extends UpdateTestBase {
     // We need to check that this string is found as part of a project row,
     // not just in the "Failed to get available update data for ..." message
     // at the top of the page.
-    $this->assertRaw('<div class="version-status">' . 'Failed to get available update data');
+    $this->assertRaw('<div class="version-status">' . t('Failed to get available update data'));
 
     // We should see the output messages from fetching manually.
     $this->assertUniqueText(t('Checked available update data for 3 projects.'));
diff --git a/core/modules/update/lib/Drupal/update/Tests/UpdateCoreTest.php b/core/modules/update/lib/Drupal/update/Tests/UpdateCoreTest.php
index 6628f4a..aba0bb6 100644
--- a/core/modules/update/lib/Drupal/update/Tests/UpdateCoreTest.php
+++ b/core/modules/update/lib/Drupal/update/Tests/UpdateCoreTest.php
@@ -164,7 +164,7 @@ class UpdateCoreTest extends UpdateTestBase {
     // We're expecting "There is a security update..." inside the status report
     // itself, but the drupal_set_message() appears as an li so we can prefix
     // with that and search for the raw HTML.
-    $this->assertNoRaw('<li>' . 'There is a security update available for your version of Drupal.');
+    $this->assertNoRaw('<li>' . t('There is a security update available for your version of Drupal.'));
 
     $this->drupalGet('admin/reports/updates');
     $this->assertNoText(t('There is a security update available for your version of Drupal.'));