diff --git a/core/modules/block/lib/Drupal/block/Tests/BlockCacheTest.php b/core/modules/block/lib/Drupal/block/Tests/BlockCacheTest.php
index 90327f9..3a5776c 100644
--- a/core/modules/block/lib/Drupal/block/Tests/BlockCacheTest.php
+++ b/core/modules/block/lib/Drupal/block/Tests/BlockCacheTest.php
@@ -64,20 +64,20 @@ class BlockCacheTest extends WebTestBase {
     variable_set('block_test_content', $current_content);
     $this->drupalLogin($this->normal_user);
     $this->drupalGet('');
-    $this->assertText($current_content, t('Block content displays.'));
+    $this->assertText($current_content, 'Block content displays.');
 
     // Change the content, but the cached copy should still be served.
     $old_content = $current_content;
     $current_content = $this->randomName();
     variable_set('block_test_content', $current_content);
     $this->drupalGet('');
-    $this->assertText($old_content, t('Block is served from the cache.'));
+    $this->assertText($old_content, 'Block is served from the cache.');
 
     // Clear the cache and verify that the stale data is no longer there.
     cache_invalidate(array('content' => TRUE));
     $this->drupalGet('');
-    $this->assertNoText($old_content, t('Block cache clear removes stale cache data.'));
-    $this->assertText($current_content, t('Fresh block content is displayed after clearing the cache.'));
+    $this->assertNoText($old_content, 'Block cache clear removes stale cache data.');
+    $this->assertText($current_content, 'Fresh block content is displayed after clearing the cache.');
 
     // Test whether the cached data is served for the correct users.
     $old_content = $current_content;
@@ -85,19 +85,19 @@ class BlockCacheTest extends WebTestBase {
     variable_set('block_test_content', $current_content);
     $this->drupalLogout();
     $this->drupalGet('');
-    $this->assertNoText($old_content, t('Anonymous user does not see content cached per-role for normal user.'));
+    $this->assertNoText($old_content, 'Anonymous user does not see content cached per-role for normal user.');
 
     $this->drupalLogin($this->normal_user_alt);
     $this->drupalGet('');
-    $this->assertText($old_content, t('User with the same roles sees per-role cached content.'));
+    $this->assertText($old_content, 'User with the same roles sees per-role cached content.');
 
     $this->drupalLogin($this->admin_user);
     $this->drupalGet('');
-    $this->assertNoText($old_content, t('Admin user does not see content cached per-role for normal user.'));
+    $this->assertNoText($old_content, 'Admin user does not see content cached per-role for normal user.');
 
     $this->drupalLogin($this->normal_user);
     $this->drupalGet('');
-    $this->assertText($old_content, t('Block is served from the per-role cache.'));
+    $this->assertText($old_content, 'Block is served from the per-role cache.');
   }
 
   /**
@@ -109,7 +109,7 @@ class BlockCacheTest extends WebTestBase {
     variable_set('block_test_content', $current_content);
 
     $this->drupalGet('');
-    $this->assertText($current_content, t('Block content displays.'));
+    $this->assertText($current_content, 'Block content displays.');
 
     $old_content = $current_content;
     $current_content = $this->randomName();
@@ -117,7 +117,7 @@ class BlockCacheTest extends WebTestBase {
 
     $this->drupalLogout();
     $this->drupalGet('user');
-    $this->assertText($old_content, t('Block content served from global cache.'));
+    $this->assertText($old_content, 'Block content served from global cache.');
   }
 
   /**
@@ -130,13 +130,13 @@ class BlockCacheTest extends WebTestBase {
 
     // If DRUPAL_NO_CACHE has no effect, the next request would be cached.
     $this->drupalGet('');
-    $this->assertText($current_content, t('Block content displays.'));
+    $this->assertText($current_content, 'Block content displays.');
 
     // A cached copy should not be served.
     $current_content = $this->randomName();
     variable_set('block_test_content', $current_content);
     $this->drupalGet('');
-    $this->assertText($current_content, t('DRUPAL_NO_CACHE prevents blocks from being cached.'));
+    $this->assertText($current_content, 'DRUPAL_NO_CACHE prevents blocks from being cached.');
   }
 
   /**
@@ -149,22 +149,22 @@ class BlockCacheTest extends WebTestBase {
     $this->drupalLogin($this->normal_user);
 
     $this->drupalGet('');
-    $this->assertText($current_content, t('Block content displays.'));
+    $this->assertText($current_content, 'Block content displays.');
 
     $old_content = $current_content;
     $current_content = $this->randomName();
     variable_set('block_test_content', $current_content);
 
     $this->drupalGet('');
-    $this->assertText($old_content, t('Block is served from per-user cache.'));
+    $this->assertText($old_content, 'Block is served from per-user cache.');
 
     $this->drupalLogin($this->normal_user_alt);
     $this->drupalGet('');
-    $this->assertText($current_content, t('Per-user block cache is not served for other users.'));
+    $this->assertText($current_content, 'Per-user block cache is not served for other users.');
 
     $this->drupalLogin($this->normal_user);
     $this->drupalGet('');
-    $this->assertText($old_content, t('Per-user block cache is persistent.'));
+    $this->assertText($old_content, 'Per-user block cache is persistent.');
   }
 
   /**
@@ -176,16 +176,16 @@ class BlockCacheTest extends WebTestBase {
     variable_set('block_test_content', $current_content);
 
     $this->drupalGet('node');
-    $this->assertText($current_content, t('Block content displays on the node page.'));
+    $this->assertText($current_content, 'Block content displays on the node page.');
 
     $old_content = $current_content;
     $current_content = $this->randomName();
     variable_set('block_test_content', $current_content);
 
     $this->drupalGet('user');
-    $this->assertNoText($old_content, t('Block content cached for the node page does not show up for the user page.'));
+    $this->assertNoText($old_content, 'Block content cached for the node page does not show up for the user page.');
     $this->drupalGet('node');
-    $this->assertText($old_content, t('Block content cached for the node page.'));
+    $this->assertText($old_content, 'Block content cached for the node page.');
   }
 
   /**
diff --git a/core/modules/block/lib/Drupal/block/Tests/BlockHiddenRegionTest.php b/core/modules/block/lib/Drupal/block/Tests/BlockHiddenRegionTest.php
index 13a78af..af5acb9 100644
--- a/core/modules/block/lib/Drupal/block/Tests/BlockHiddenRegionTest.php
+++ b/core/modules/block/lib/Drupal/block/Tests/BlockHiddenRegionTest.php
@@ -59,7 +59,7 @@ class BlockHiddenRegionTest extends WebTestBase {
 
     // Ensure that the search form block is displayed.
     $this->drupalGet('');
-    $this->assertText('Search', t('Block was displayed on the front page.'));
+    $this->assertText('Search', 'Block was displayed on the front page.');
 
     // Enable "block_test_theme" and set it as the default theme.
     $theme = 'block_test_theme';
@@ -69,10 +69,10 @@ class BlockHiddenRegionTest extends WebTestBase {
 
     // Ensure that "block_test_theme" is set as the default theme.
     $this->drupalGet('admin/structure/block');
-    $this->assertText('Block test theme(' . t('active tab') . ')', t('Default local task on blocks admin page is the block test theme.'));
+    $this->assertText('Block test theme(' . t('active tab') . ')', 'Default local task on blocks admin page is the block test theme.');
 
     // Ensure that the search form block is displayed.
     $this->drupalGet('');
-    $this->assertText('Search', t('Block was displayed on the front page.'));
+    $this->assertText('Search', 'Block was displayed on the front page.');
   }
 }
diff --git a/core/modules/block/lib/Drupal/block/Tests/BlockHtmlIdTest.php b/core/modules/block/lib/Drupal/block/Tests/BlockHtmlIdTest.php
index fd28702..705bc76 100644
--- a/core/modules/block/lib/Drupal/block/Tests/BlockHtmlIdTest.php
+++ b/core/modules/block/lib/Drupal/block/Tests/BlockHtmlIdTest.php
@@ -50,6 +50,6 @@ class BlockHtmlIdTest extends WebTestBase {
    */
   function testHtmlId() {
     $this->drupalGet('');
-    $this->assertRaw('block-block-test-test-html-id', t('HTML id for test block is valid.'));
+    $this->assertRaw('block-block-test-test-html-id', 'HTML id for test block is valid.');
   }
 }
diff --git a/core/modules/block/lib/Drupal/block/Tests/BlockLanguageTest.php b/core/modules/block/lib/Drupal/block/Tests/BlockLanguageTest.php
index 49d6a76..6d0c6bc 100644
--- a/core/modules/block/lib/Drupal/block/Tests/BlockLanguageTest.php
+++ b/core/modules/block/lib/Drupal/block/Tests/BlockLanguageTest.php
@@ -44,11 +44,11 @@ class BlockLanguageTest extends WebTestBase {
       'predefined_langcode' => 'fr',
     );
     $this->drupalPost('admin/config/regional/language/add', $edit, t('Add language'));
-    $this->assertText('French', t('Language added successfully.'));
+    $this->assertText('French', 'Language added successfully.');
 
     // Check if the visibility setting is available.
     $this->drupalGet('admin/structure/block/add');
-    $this->assertField('langcodes[en]', t('Language visibility field is visible.'));
+    $this->assertField('langcodes[en]', 'Language visibility field is visible.');
 
     // Create a new block.
     $info_name = $this->randomString(10);
@@ -81,11 +81,11 @@ class BlockLanguageTest extends WebTestBase {
 
     // Check that a page has a block
     $this->drupalGet('', array('language' => language_load('en')));
-    $this->assertText($body, t('The body of the custom block appears on the page.'));
+    $this->assertText($body, 'The body of the custom block appears on the page.');
 
     // Check that a page doesn't has a block for the current language anymore
     $this->drupalGet('', array('language' => language_load('fr')));
-    $this->assertNoText($body, t('The body of the custom block does not appear on the page.'));
+    $this->assertNoText($body, 'The body of the custom block does not appear on the page.');
   }
 
   /**
@@ -103,7 +103,7 @@ class BlockLanguageTest extends WebTestBase {
       'predefined_langcode' => 'fr',
     );
     $this->drupalPost('admin/config/regional/language/add', $edit, t('Add language'));
-    $this->assertText('French', t('Language added successfully.'));
+    $this->assertText('French', 'Language added successfully.');
 
     // Create a new block.
     $info_name = $this->randomString(10);
@@ -130,7 +130,7 @@ class BlockLanguageTest extends WebTestBase {
       ':module' => 'block',
       ':delta' => '1'
     ))->fetchField();
-    $this->assertTrue($count == 1, t('The block language visibility has an entry in the database.'));
+    $this->assertTrue($count == 1, 'The block language visibility has an entry in the database.');
 
     // Delete the language.
     $this->drupalPost('admin/config/regional/language/delete/fr', array(), t('Delete'));
@@ -140,7 +140,7 @@ class BlockLanguageTest extends WebTestBase {
       ':module' => 'block',
       ':delta' => '1'
     ))->fetchField();
-    $this->assertTrue($count == 0, t('The block language visibility do not have an entry in the database.'));
+    $this->assertTrue($count == 0, 'The block language visibility do not have an entry in the database.');
   }
 
   /**
@@ -158,7 +158,7 @@ class BlockLanguageTest extends WebTestBase {
       'predefined_langcode' => 'fr',
     );
     $this->drupalPost('admin/config/regional/language/add', $edit, t('Add language'));
-    $this->assertText('French', t('Language added successfully.'));
+    $this->assertText('French', 'Language added successfully.');
 
     // Create a new block.
     $info_name = $this->randomString(10);
@@ -185,7 +185,7 @@ class BlockLanguageTest extends WebTestBase {
       ':module' => 'block',
       ':delta' => '1'
     ))->fetchField();
-    $this->assertTrue($count == 1, t('The block language visibility has an entry in the database.'));
+    $this->assertTrue($count == 1, 'The block language visibility has an entry in the database.');
 
     // Delete the custom block.
     $this->drupalPost('admin/structure/block/manage/block/1/delete', array(), t('Delete'));
@@ -195,6 +195,6 @@ class BlockLanguageTest extends WebTestBase {
       ':module' => 'block',
       ':delta' => '1'
     ))->fetchField();
-    $this->assertTrue($count == 0, t('The block language visibility do not have an entry in the database.'));
+    $this->assertTrue($count == 0, 'The block language visibility do not have an entry in the database.');
   }
 }
diff --git a/core/modules/block/lib/Drupal/block/Tests/BlockTemplateSuggestionsUnitTest.php b/core/modules/block/lib/Drupal/block/Tests/BlockTemplateSuggestionsUnitTest.php
index f30956b..3b5b389 100644
--- a/core/modules/block/lib/Drupal/block/Tests/BlockTemplateSuggestionsUnitTest.php
+++ b/core/modules/block/lib/Drupal/block/Tests/BlockTemplateSuggestionsUnitTest.php
@@ -35,7 +35,7 @@ class BlockTemplateSuggestionsUnitTest extends UnitTestBase {
     $variables1['elements']['#block'] = $block1;
     $variables1['elements']['#children'] = '';
     template_preprocess_block($variables1);
-    $this->assertEqual($variables1['theme_hook_suggestions'], array('block__footer', 'block__block', 'block__block__underscore_test'), t('Found expected block suggestions for delta with underscore'));
+    $this->assertEqual($variables1['theme_hook_suggestions'], array('block__footer', 'block__block', 'block__block__underscore_test'), 'Found expected block suggestions for delta with underscore');
 
     // Define block delta with hyphens to be preprocessed. Hyphens should be
     // replaced with underscores.
@@ -49,8 +49,8 @@ class BlockTemplateSuggestionsUnitTest extends UnitTestBase {
     // Test adding a class to the block content.
     $variables2['content_attributes']['class'][] = 'test-class';
     template_preprocess_block($variables2);
-    $this->assertEqual($variables2['theme_hook_suggestions'], array('block__footer', 'block__block', 'block__block__hyphen_test'), t('Hyphens (-) in block delta were replaced by underscore (_)'));
+    $this->assertEqual($variables2['theme_hook_suggestions'], array('block__footer', 'block__block', 'block__block__hyphen_test'), 'Hyphens (-) in block delta were replaced by underscore (_)');
     // Test that the default class and added class are available.
-    $this->assertEqual($variables2['content_attributes']['class'], array('test-class', 'content'), t('Default .content class added to block content_attributes_array'));
+    $this->assertEqual($variables2['content_attributes']['class'], array('test-class', 'content'), 'Default .content class added to block content_attributes_array');
   }
 }
diff --git a/core/modules/block/lib/Drupal/block/Tests/BlockTest.php b/core/modules/block/lib/Drupal/block/Tests/BlockTest.php
index f98da2b..1b598e3 100644
--- a/core/modules/block/lib/Drupal/block/Tests/BlockTest.php
+++ b/core/modules/block/lib/Drupal/block/Tests/BlockTest.php
@@ -68,9 +68,9 @@ class BlockTest extends WebTestBase {
 
     // Confirm that the add block link appears on block overview pages.
     $this->drupalGet('admin/structure/block');
-    $this->assertRaw(l('Add block', 'admin/structure/block/add'), t('Add block link is present on block overview page for default theme.'));
+    $this->assertRaw(l('Add block', 'admin/structure/block/add'), 'Add block link is present on block overview page for default theme.');
     $this->drupalGet('admin/structure/block/list/seven');
-    $this->assertRaw(l('Add block', 'admin/structure/block/list/seven/add'), t('Add block link is present on block overview page for non-default theme.'));
+    $this->assertRaw(l('Add block', 'admin/structure/block/list/seven/add'), 'Add block link is present on block overview page for non-default theme.');
 
     // Confirm that hidden regions are not shown as options for block placement
     // when adding a new block.
@@ -81,7 +81,7 @@ class BlockTest extends WebTestBase {
       if ($theme->status) {
         foreach ($theme->info['regions_hidden'] as $hidden_region) {
           $elements = $this->xpath('//select[@id=:id]//option[@value=:value]', array(':id' => 'edit-regions-' . $key, ':value' => $hidden_region));
-          $this->assertFalse(isset($elements[0]), t('The hidden region @region is not available for @theme.', array('@region' => $hidden_region, '@theme' => $key)));
+          $this->assertFalse(isset($elements[0]), format_string('The hidden region @region is not available for @theme.', array('@region' => $hidden_region, '@theme' => $key)));
         }
       }
     }
@@ -94,17 +94,17 @@ class BlockTest extends WebTestBase {
     $this->drupalPost('admin/structure/block/add', $custom_block, t('Save block'));
 
     // Confirm that the custom block has been created, and then query the created bid.
-    $this->assertText(t('The block has been created.'), t('Custom block successfully created.'));
+    $this->assertText(t('The block has been created.'), 'Custom block successfully created.');
     $bid = db_query("SELECT bid FROM {block_custom} WHERE info = :info", array(':info' => $custom_block['info']))->fetchField();
 
     // Check to see if the custom block was created by checking that it's in the database.
-    $this->assertNotNull($bid, t('Custom block found in database'));
+    $this->assertNotNull($bid, 'Custom block found in database');
 
     // Check that block_block_view() returns the correct title and content.
     $data = block_block_view($bid);
     $format = db_query("SELECT format FROM {block_custom} WHERE bid = :bid", array(':bid' => $bid))->fetchField();
-    $this->assertTrue(array_key_exists('subject', $data) && empty($data['subject']), t('block_block_view() provides an empty block subject, since custom blocks do not have default titles.'));
-    $this->assertEqual(check_markup($custom_block['body[value]'], $format), $data['content'], t('block_block_view() provides correct block content.'));
+    $this->assertTrue(array_key_exists('subject', $data) && empty($data['subject']), 'block_block_view() provides an empty block subject, since custom blocks do not have default titles.');
+    $this->assertEqual(check_markup($custom_block['body[value]'], $format), $data['content'], 'block_block_view() provides correct block content.');
 
     // Check whether the block can be moved to all available regions.
     $custom_block['module'] = 'block';
@@ -115,8 +115,8 @@ class BlockTest extends WebTestBase {
 
     // Verify presence of configure and delete links for custom block.
     $this->drupalGet('admin/structure/block');
-    $this->assertLinkByHref('admin/structure/block/manage/block/' . $bid . '/configure', 0, t('Custom block configure link found.'));
-    $this->assertLinkByHref('admin/structure/block/manage/block/' . $bid . '/delete', 0, t('Custom block delete link found.'));
+    $this->assertLinkByHref('admin/structure/block/manage/block/' . $bid . '/configure', 0, 'Custom block configure link found.');
+    $this->assertLinkByHref('admin/structure/block/manage/block/' . $bid . '/delete', 0, 'Custom block delete link found.');
 
     // Set visibility only for authenticated users, to verify delete functionality.
     $edit = array();
@@ -126,10 +126,10 @@ class BlockTest extends WebTestBase {
     // Delete the created custom block & verify that it's been deleted and no longer appearing on the page.
     $this->clickLink(t('delete'));
     $this->drupalPost('admin/structure/block/manage/block/' . $bid . '/delete', array(), t('Delete'));
-    $this->assertRaw(t('The block %title has been removed.', array('%title' => $custom_block['info'])), t('Custom block successfully deleted.'));
-    $this->assertNoText(t($custom_block['title']), t('Custom block no longer appears on page.'));
+    $this->assertRaw(t('The block %title has been removed.', array('%title' => $custom_block['info'])), 'Custom block successfully deleted.');
+    $this->assertNoText(t($custom_block['title']), 'Custom block no longer appears on page.');
     $count = db_query("SELECT 1 FROM {block_role} WHERE module = :module AND delta = :delta", array(':module' => $custom_block['module'], ':delta' => $custom_block['delta']))->fetchField();
-    $this->assertFalse($count, t('Table block_role being cleaned.'));
+    $this->assertFalse($count, 'Table block_role being cleaned.');
   }
 
   /**
@@ -153,20 +153,20 @@ class BlockTest extends WebTestBase {
 
     // Confirm that the custom block is being displayed using configured text format.
     $this->drupalGet('node');
-    $this->assertRaw('<h1>Full HTML</h1>', t('Custom block successfully being displayed using Full HTML.'));
+    $this->assertRaw('<h1>Full HTML</h1>', 'Custom block successfully being displayed using Full HTML.');
 
     // Confirm that a user without access to Full HTML can not see the body field,
     // but can still submit the form without errors.
     $block_admin = $this->drupalCreateUser(array('administer blocks'));
     $this->drupalLogin($block_admin);
     $this->drupalGet('admin/structure/block/manage/block/' . $bid . '/configure');
-    $this->assertFieldByXPath("//textarea[@name='body[value]' and @disabled='disabled']", t('This field has been disabled because you do not have sufficient permissions to edit it.'), t('Body field contains denied message'));
+    $this->assertFieldByXPath("//textarea[@name='body[value]' and @disabled='disabled']", t('This field has been disabled because you do not have sufficient permissions to edit it.'), 'Body field contains denied message');
     $this->drupalPost('admin/structure/block/manage/block/' . $bid . '/configure', array(), t('Save block'));
     $this->assertNoText(t('Ensure that each block description is unique.'));
 
     // Confirm that the custom block is still being displayed using configured text format.
     $this->drupalGet('node');
-    $this->assertRaw('<h1>Full HTML</h1>', t('Custom block successfully being displayed using Full HTML.'));
+    $this->assertRaw('<h1>Full HTML</h1>', 'Custom block successfully being displayed using Full HTML.');
   }
 
   /**
@@ -205,21 +205,21 @@ class BlockTest extends WebTestBase {
     $this->moveBlockToRegion($block, $this->regions[1]);
 
     $this->drupalGet('');
-    $this->assertText($title, t('Block was displayed on the front page.'));
+    $this->assertText($title, 'Block was displayed on the front page.');
 
     $this->drupalGet('user');
-    $this->assertNoText($title, t('Block was not displayed according to block visibility rules.'));
+    $this->assertNoText($title, 'Block was not displayed according to block visibility rules.');
 
     $this->drupalGet('USER/' . $this->admin_user->uid);
-    $this->assertNoText($title, t('Block was not displayed according to block visibility rules regardless of path case.'));
+    $this->assertNoText($title, 'Block was not displayed according to block visibility rules regardless of path case.');
 
     // Confirm that the block is not displayed to anonymous users.
     $this->drupalLogout();
     $this->drupalGet('');
-    $this->assertNoText($title, t('Block was not displayed to anonymous users.'));
+    $this->assertNoText($title, 'Block was not displayed to anonymous users.');
 
     // Confirm that an empty block is not displayed.
-    $this->assertNoRaw('block-system-help', t('Empty block not displayed.'));
+    $this->assertNoRaw('block-system-help', 'Empty block not displayed.');
   }
 
   /**
@@ -254,15 +254,15 @@ class BlockTest extends WebTestBase {
     $this->drupalPost('admin/structure/block/manage/' . $block['module'] . '/' . $block['delta'] . '/configure', $edit, t('Save block'));
 
     $this->drupalGet('');
-    $this->assertNoText($title, t('Block was not displayed according to block visibility rules.'));
+    $this->assertNoText($title, 'Block was not displayed according to block visibility rules.');
 
     $this->drupalGet('user');
-    $this->assertNoText($title, t('Block was not displayed according to block visibility rules regardless of path case.'));
+    $this->assertNoText($title, 'Block was not displayed according to block visibility rules regardless of path case.');
 
     // Confirm that the block is not displayed to anonymous users.
     $this->drupalLogout();
     $this->drupalGet('');
-    $this->assertNoText($title, t('Block was not displayed to anonymous users.'));
+    $this->assertNoText($title, 'Block was not displayed to anonymous users.');
   }
 
   /**
@@ -300,7 +300,7 @@ class BlockTest extends WebTestBase {
     $this->drupalPost('user/' . $this->admin_user->uid . '/edit', $edit, t('Save'));
 
     $this->drupalGet('');
-    $this->assertNoText($block['title'], t('Block was not displayed according to per user block visibility setting.'));
+    $this->assertNoText($block['title'], 'Block was not displayed according to per user block visibility setting.');
 
     // Set the block to be customizable per user, hidden by default.
     $edit = array();
@@ -313,7 +313,7 @@ class BlockTest extends WebTestBase {
     $this->drupalPost('user/' . $this->admin_user->uid . '/edit', $edit, t('Save'));
 
     $this->drupalGet('');
-    $this->assertText($block['title'], t('Block was displayed according to per user block visibility setting.'));
+    $this->assertText($block['title'], 'Block was displayed according to per user block visibility setting.');
   }
 
   /**
@@ -328,14 +328,14 @@ class BlockTest extends WebTestBase {
 
     // Set block title to confirm that interface works and override any custom titles.
     $this->drupalPost('admin/structure/block/manage/' . $block['module'] . '/' . $block['delta'] . '/configure', array('title' => $block['title']), t('Save block'));
-    $this->assertText(t('The block configuration has been saved.'), t('Block title set.'));
+    $this->assertText(t('The block configuration has been saved.'), 'Block title set.');
     $bid = db_query("SELECT bid FROM {block} WHERE module = :module AND delta = :delta", array(
       ':module' => $block['module'],
       ':delta' => $block['delta'],
     ))->fetchField();
 
     // Check to see if the block was created by checking that it's in the database.
-    $this->assertNotNull($bid, t('Block found in database'));
+    $this->assertNotNull($bid, 'Block found in database');
 
     // Check whether the block can be moved to all available regions.
     foreach ($this->regions as $region) {
@@ -348,21 +348,21 @@ class BlockTest extends WebTestBase {
     $this->drupalPost('admin/structure/block', $edit, t('Save blocks'));
 
     // Confirm that the block was moved to the proper region.
-    $this->assertText(t('The block settings have been updated.'), t('Block successfully move to disabled region.'));
-    $this->assertNoText(t($block['title']), t('Block no longer appears on page.'));
+    $this->assertText(t('The block settings have been updated.'), 'Block successfully move to disabled region.');
+    $this->assertNoText(t($block['title']), 'Block no longer appears on page.');
 
     // Confirm that the region's xpath is not available.
     $xpath = $this->buildXPathQuery('//div[@id=:id]/*', array(':id' => 'block-block-' . $bid));
-    $this->assertNoFieldByXPath($xpath, FALSE, t('Custom block found in no regions.'));
+    $this->assertNoFieldByXPath($xpath, FALSE, 'Custom block found in no regions.');
 
     // For convenience of developers, put the navigation block back.
     $edit = array();
     $edit['blocks[' . $block['module'] . '_' . $block['delta'] . '][region]'] = $this->regions[1];
     $this->drupalPost('admin/structure/block', $edit, t('Save blocks'));
-    $this->assertText(t('The block settings have been updated.'), t('Block successfully move to first sidebar region.'));
+    $this->assertText(t('The block settings have been updated.'), 'Block successfully move to first sidebar region.');
 
     $this->drupalPost('admin/structure/block/manage/' . $block['module'] . '/' . $block['delta'] . '/configure', array('title' => 'Navigation'), t('Save block'));
-    $this->assertText(t('The block configuration has been saved.'), t('Block title set.'));
+    $this->assertText(t('The block configuration has been saved.'), 'Block title set.');
   }
 
   function moveBlockToRegion($block, $region) {
@@ -372,18 +372,18 @@ class BlockTest extends WebTestBase {
     $this->drupalPost('admin/structure/block', $edit, t('Save blocks'));
 
     // Confirm that the block was moved to the proper region.
-    $this->assertText(t('The block settings have been updated.'), t('Block successfully moved to %region_name region.', array( '%region_name' => $region)));
+    $this->assertText(t('The block settings have been updated.'), format_string('Block successfully moved to %region_name region.', array( '%region_name' => $region)));
 
     // Confirm that the block is being displayed.
     $this->drupalGet('node');
-    $this->assertText(t($block['title']), t('Block successfully being displayed on the page.'));
+    $this->assertText(t($block['title']), 'Block successfully being displayed on the page.');
 
     // Confirm that the custom block was found at the proper region.
     $xpath = $this->buildXPathQuery('//div[@class=:region-class]//div[@id=:block-id]/*', array(
       ':region-class' => 'region region-' . str_replace('_', '-', $region),
       ':block-id' => 'block-' . $block['module'] . '-' . $block['delta'],
     ));
-    $this->assertFieldByXPath($xpath, NULL, t('Custom block found in %region_name region.', array('%region_name' => $region)));
+    $this->assertFieldByXPath($xpath, NULL, format_string('Custom block found in %region_name region.', array('%region_name' => $region)));
   }
 
   /**
@@ -391,14 +391,14 @@ class BlockTest extends WebTestBase {
    */
   function testBlockRehash() {
     module_enable(array('block_test'));
-    $this->assertTrue(module_exists('block_test'), t('Test block module enabled.'));
+    $this->assertTrue(module_exists('block_test'), 'Test block module enabled.');
 
     // Our new block should be inserted in the database when we visit the
     // block management page.
     $this->drupalGet('admin/structure/block');
     // Our test block's caching should default to DRUPAL_CACHE_PER_ROLE.
     $current_caching = db_query("SELECT cache FROM {block} WHERE module = 'block_test' AND delta = 'test_cache'")->fetchField();
-    $this->assertEqual($current_caching, DRUPAL_CACHE_PER_ROLE, t('Test block cache mode defaults to DRUPAL_CACHE_PER_ROLE.'));
+    $this->assertEqual($current_caching, DRUPAL_CACHE_PER_ROLE, 'Test block cache mode defaults to DRUPAL_CACHE_PER_ROLE.');
 
     // Disable caching for this block.
     variable_set('block_test_caching', DRUPAL_NO_CACHE);
@@ -406,6 +406,6 @@ class BlockTest extends WebTestBase {
     $this->resetAll();
     // Verify that the database is updated with the new caching mode.
     $current_caching = db_query("SELECT cache FROM {block} WHERE module = 'block_test' AND delta = 'test_cache'")->fetchField();
-    $this->assertEqual($current_caching, DRUPAL_NO_CACHE, t("Test block's database entry updated to DRUPAL_NO_CACHE."));
+    $this->assertEqual($current_caching, DRUPAL_NO_CACHE, "Test block's database entry updated to DRUPAL_NO_CACHE.");
   }
 }
diff --git a/core/modules/block/lib/Drupal/block/Tests/NewDefaultThemeBlocksTest.php b/core/modules/block/lib/Drupal/block/Tests/NewDefaultThemeBlocksTest.php
index bf1ba7a..c133f17 100644
--- a/core/modules/block/lib/Drupal/block/Tests/NewDefaultThemeBlocksTest.php
+++ b/core/modules/block/lib/Drupal/block/Tests/NewDefaultThemeBlocksTest.php
@@ -44,7 +44,7 @@ class NewDefaultThemeBlocksTest extends WebTestBase {
       $themes['admin'] = $admin_theme;
     }
     $count = db_query_range('SELECT 1 FROM {block} WHERE theme NOT IN (:themes)', 0, 1, array(':themes' => $themes))->fetchField();
-    $this->assertFalse($count, t('Only the default theme and the admin theme have blocks.'));
+    $this->assertFalse($count, 'Only the default theme and the admin theme have blocks.');
 
     // Populate list of all blocks for matching against new theme.
     $blocks = array();
@@ -63,7 +63,7 @@ class NewDefaultThemeBlocksTest extends WebTestBase {
     $result = db_query('SELECT * FROM {block} WHERE theme = :theme', array(':theme' => $new_theme));
     foreach ($result as $block) {
       unset($block->theme, $block->bid);
-      $this->assertEqual($blocks[$block->module][$block->delta], $block, t('Block %name matched', array('%name' => $block->module . '-' . $block->delta)));
+      $this->assertEqual($blocks[$block->module][$block->delta], $block, format_string('Block %name matched', array('%name' => $block->module . '-' . $block->delta)));
     }
   }
 }