diff --git a/modules/image/image.test b/modules/image/image.test
index d4db213..292ec4a 100644
--- a/modules/image/image.test
+++ b/modules/image/image.test
@@ -132,11 +132,11 @@ class ImageStylesPathAndUrlTestCase extends DrupalWebTestCase {
     $scheme = 'public';
     $actual = image_style_path($this->style_name, "$scheme://foo/bar.gif");
     $expected = "$scheme://styles/" . $this->style_name . "/$scheme/foo/bar.gif";
-    $this->assertEqual($actual, $expected, t('Got the path for a file URI.'));
+    $this->assertEqual($actual, $expected, 'Got the path for a file URI.');
 
     $actual = image_style_path($this->style_name, 'foo/bar.gif');
     $expected = "$scheme://styles/" . $this->style_name . "/$scheme/foo/bar.gif";
-    $this->assertEqual($actual, $expected, t('Got the path for a relative file path.'));
+    $this->assertEqual($actual, $expected, 'Got the path for a relative file path.');
   }
 
   /**
@@ -179,7 +179,7 @@ class ImageStylesPathAndUrlTestCase extends DrupalWebTestCase {
     // Create the directories for the styles.
     $directory = $scheme . '://styles/' . $this->style_name;
     $status = file_prepare_directory($directory, FILE_CREATE_DIRECTORY);
-    $this->assertNotIdentical(FALSE, $status, t('Created the directory for the generated images for the test style.'));
+    $this->assertNotIdentical(FALSE, $status, 'Created the directory for the generated images for the test style.');
 
     // Create a working copy of the file.
     $files = $this->drupalGetTestFiles('image');
@@ -189,11 +189,11 @@ class ImageStylesPathAndUrlTestCase extends DrupalWebTestCase {
     // Let the image_module_test module know about this file, so it can claim
     // ownership in hook_file_download().
     variable_set('image_module_test_file_download', $original_uri);
-    $this->assertNotIdentical(FALSE, $original_uri, t('Created the generated image file.'));
+    $this->assertNotIdentical(FALSE, $original_uri, 'Created the generated image file.');
 
     // Get the URL of a file that has not been generated and try to create it.
     $generated_uri = image_style_path($this->style_name, $original_uri);
-    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
+    $this->assertFalse(file_exists($generated_uri), 'Generated file does not exist.');
     $generate_url = image_style_url($this->style_name, $original_uri);
 
     if (!$clean_url) {
@@ -208,32 +208,32 @@ class ImageStylesPathAndUrlTestCase extends DrupalWebTestCase {
 
     // Fetch the URL that generates the file.
     $this->drupalGet($generate_url);
-    $this->assertResponse(200, t('Image was generated at the URL.'));
-    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
-    $this->assertRaw(file_get_contents($generated_uri), t('URL returns expected file.'));
+    $this->assertResponse(200, 'Image was generated at the URL.');
+    $this->assertTrue(file_exists($generated_uri), 'Generated file does exist after we accessed it.');
+    $this->assertRaw(file_get_contents($generated_uri), 'URL returns expected file.');
     $generated_image_info = image_get_info($generated_uri);
-    $this->assertEqual($this->drupalGetHeader('Content-Type'), $generated_image_info['mime_type'], t('Expected Content-Type was reported.'));
-    $this->assertEqual($this->drupalGetHeader('Content-Length'), $generated_image_info['file_size'], t('Expected Content-Length was reported.'));
+    $this->assertEqual($this->drupalGetHeader('Content-Type'), $generated_image_info['mime_type'], 'Expected Content-Type was reported.');
+    $this->assertEqual($this->drupalGetHeader('Content-Length'), $generated_image_info['file_size'], 'Expected Content-Length was reported.');
     if ($scheme == 'private') {
-      $this->assertEqual($this->drupalGetHeader('Expires'), 'Sun, 19 Nov 1978 05:00:00 GMT', t('Expires header was sent.'));
-      $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'no-cache, must-revalidate, post-check=0, pre-check=0', t('Cache-Control header was set to prevent caching.'));
-      $this->assertEqual($this->drupalGetHeader('X-Image-Owned-By'), 'image_module_test', t('Expected custom header has been added.'));
+      $this->assertEqual($this->drupalGetHeader('Expires'), 'Sun, 19 Nov 1978 05:00:00 GMT', 'Expires header was sent.');
+      $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'no-cache, must-revalidate, post-check=0, pre-check=0', 'Cache-Control header was set to prevent caching.');
+      $this->assertEqual($this->drupalGetHeader('X-Image-Owned-By'), 'image_module_test', 'Expected custom header has been added.');
 
       // Make sure that a second request to the already existing derivate works
       // too.
       $this->drupalGet($generate_url);
-      $this->assertResponse(200, t('Image was generated at the URL.'));
+      $this->assertResponse(200, 'Image was generated at the URL.');
 
       // Repeat this with a different file that we do not have access to and
       // make sure that access is denied.
       $file_noaccess = array_shift($files);
       $original_uri_noaccess = file_unmanaged_copy($file_noaccess->uri, $scheme . '://', FILE_EXISTS_RENAME);
       $generated_uri_noaccess = $scheme . '://styles/' . $this->style_name . '/' . $scheme . '/'. drupal_basename($original_uri_noaccess);
-      $this->assertFalse(file_exists($generated_uri_noaccess), t('Generated file does not exist.'));
+      $this->assertFalse(file_exists($generated_uri_noaccess), 'Generated file does not exist.');
       $generate_url_noaccess = image_style_url($this->style_name, $original_uri_noaccess);
 
       $this->drupalGet($generate_url_noaccess);
-      $this->assertResponse(403, t('Confirmed that access is denied for the private image style.') );
+      $this->assertResponse(403, 'Confirmed that access is denied for the private image style.');
       // Verify that images are not appended to the response. Currently this test only uses PNG images.
       if (strpos($generate_url, '.png') === FALSE ) {
         $this->fail('Confirming that private image styles are not appended require PNG file.');
@@ -274,13 +274,13 @@ class ImageEffectsUnitTest extends ImageToolkitTestCase {
    * Test the image_resize_effect() function.
    */
   function testResizeEffect() {
-    $this->assertTrue(image_resize_effect($this->image, array('width' => 1, 'height' => 2)), t('Function returned the expected value.'));
+    $this->assertTrue(image_resize_effect($this->image, array('width' => 1, 'height' => 2)), 'Function returned the expected value.');
     $this->assertToolkitOperationsCalled(array('resize'));
 
     // Check the parameters.
     $calls = image_test_get_all_calls();
-    $this->assertEqual($calls['resize'][0][1], 1, t('Width was passed correctly'));
-    $this->assertEqual($calls['resize'][0][2], 2, t('Height was passed correctly'));
+    $this->assertEqual($calls['resize'][0][1], 1, 'Width was passed correctly');
+    $this->assertEqual($calls['resize'][0][2], 2, 'Height was passed correctly');
   }
 
   /**
@@ -288,13 +288,13 @@ class ImageEffectsUnitTest extends ImageToolkitTestCase {
    */
   function testScaleEffect() {
     // @todo: need to test upscaling.
-    $this->assertTrue(image_scale_effect($this->image, array('width' => 10, 'height' => 10)), t('Function returned the expected value.'));
+    $this->assertTrue(image_scale_effect($this->image, array('width' => 10, 'height' => 10)), 'Function returned the expected value.');
     $this->assertToolkitOperationsCalled(array('resize'));
 
     // Check the parameters.
     $calls = image_test_get_all_calls();
-    $this->assertEqual($calls['resize'][0][1], 10, t('Width was passed correctly'));
-    $this->assertEqual($calls['resize'][0][2], 5, t('Height was based off aspect ratio and passed correctly'));
+    $this->assertEqual($calls['resize'][0][1], 10, 'Width was passed correctly');
+    $this->assertEqual($calls['resize'][0][2], 5, 'Height was based off aspect ratio and passed correctly');
   }
 
   /**
@@ -302,42 +302,42 @@ class ImageEffectsUnitTest extends ImageToolkitTestCase {
    */
   function testCropEffect() {
     // @todo should test the keyword offsets.
-    $this->assertTrue(image_crop_effect($this->image, array('anchor' => 'top-1', 'width' => 3, 'height' => 4)), t('Function returned the expected value.'));
+    $this->assertTrue(image_crop_effect($this->image, array('anchor' => 'top-1', 'width' => 3, 'height' => 4)), 'Function returned the expected value.');
     $this->assertToolkitOperationsCalled(array('crop'));
 
     // Check the parameters.
     $calls = image_test_get_all_calls();
-    $this->assertEqual($calls['crop'][0][1], 0, t('X was passed correctly'));
-    $this->assertEqual($calls['crop'][0][2], 1, t('Y was passed correctly'));
-    $this->assertEqual($calls['crop'][0][3], 3, t('Width was passed correctly'));
-    $this->assertEqual($calls['crop'][0][4], 4, t('Height was passed correctly'));
+    $this->assertEqual($calls['crop'][0][1], 0, 'X was passed correctly');
+    $this->assertEqual($calls['crop'][0][2], 1, 'Y was passed correctly');
+    $this->assertEqual($calls['crop'][0][3], 3, 'Width was passed correctly');
+    $this->assertEqual($calls['crop'][0][4], 4, 'Height was passed correctly');
   }
 
   /**
    * Test the image_scale_and_crop_effect() function.
    */
   function testScaleAndCropEffect() {
-    $this->assertTrue(image_scale_and_crop_effect($this->image, array('width' => 5, 'height' => 10)), t('Function returned the expected value.'));
+    $this->assertTrue(image_scale_and_crop_effect($this->image, array('width' => 5, 'height' => 10)), 'Function returned the expected value.');
     $this->assertToolkitOperationsCalled(array('resize', 'crop'));
 
     // Check the parameters.
     $calls = image_test_get_all_calls();
-    $this->assertEqual($calls['crop'][0][1], 7.5, t('X was computed and passed correctly'));
-    $this->assertEqual($calls['crop'][0][2], 0, t('Y was computed and passed correctly'));
-    $this->assertEqual($calls['crop'][0][3], 5, t('Width was computed and passed correctly'));
-    $this->assertEqual($calls['crop'][0][4], 10, t('Height was computed and passed correctly'));
+    $this->assertEqual($calls['crop'][0][1], 7.5, 'X was computed and passed correctly');
+    $this->assertEqual($calls['crop'][0][2], 0, 'Y was computed and passed correctly');
+    $this->assertEqual($calls['crop'][0][3], 5, 'Width was computed and passed correctly');
+    $this->assertEqual($calls['crop'][0][4], 10, 'Height was computed and passed correctly');
   }
 
   /**
    * Test the image_desaturate_effect() function.
    */
   function testDesaturateEffect() {
-    $this->assertTrue(image_desaturate_effect($this->image, array()), t('Function returned the expected value.'));
+    $this->assertTrue(image_desaturate_effect($this->image, array()), 'Function returned the expected value.');
     $this->assertToolkitOperationsCalled(array('desaturate'));
 
     // Check the parameters.
     $calls = image_test_get_all_calls();
-    $this->assertEqual(count($calls['desaturate'][0]), 1, t('Only the image was passed.'));
+    $this->assertEqual(count($calls['desaturate'][0]), 1, 'Only the image was passed.');
   }
 
   /**
@@ -345,13 +345,13 @@ class ImageEffectsUnitTest extends ImageToolkitTestCase {
    */
   function testRotateEffect() {
     // @todo: need to test with 'random' => TRUE
-    $this->assertTrue(image_rotate_effect($this->image, array('degrees' => 90, 'bgcolor' => '#fff')), t('Function returned the expected value.'));
+    $this->assertTrue(image_rotate_effect($this->image, array('degrees' => 90, 'bgcolor' => '#fff')), 'Function returned the expected value.');
     $this->assertToolkitOperationsCalled(array('rotate'));
 
     // Check the parameters.
     $calls = image_test_get_all_calls();
-    $this->assertEqual($calls['rotate'][0][1], 90, t('Degrees were passed correctly'));
-    $this->assertEqual($calls['rotate'][0][2], 0xffffff, t('Background color was passed correctly'));
+    $this->assertEqual($calls['rotate'][0][1], 90, 'Degrees were passed correctly');
+    $this->assertEqual($calls['rotate'][0][2], 0xffffff, 'Background color was passed correctly');
   }
 
   /**
@@ -421,9 +421,9 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
       'name' => $style_name,
     );
     $this->drupalPost('admin/config/media/image-styles/add', $edit, t('Create new style'));
-    $this->assertRaw(t('Style %name was created.', array('%name' => $style_name)), t('Image style successfully created.'));
+    $this->assertRaw(t('Style %name was created.', array('%name' => $style_name)), 'Image style successfully created.');
     $options = image_style_options();
-    $this->assertTrue(array_key_exists($style_name, $options), t('Array key %key exists.', array('%key' => $style_name)));
+    $this->assertTrue(array_key_exists($style_name, $options), format_string('Array key %key exists.', array('%key' => $style_name)));
   }
 
   /**
@@ -468,7 +468,7 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
       'name' => $style_name,
     );
     $this->drupalPost('admin/config/media/image-styles/add', $edit, t('Create new style'));
-    $this->assertRaw(t('Style %name was created.', array('%name' => $style_name)), t('Image style successfully created.'));
+    $this->assertRaw(t('Style %name was created.', array('%name' => $style_name)), 'Image style successfully created.');
 
     // Add effect form.
 
@@ -490,7 +490,7 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
     foreach ($style['effects'] as $ieid => $effect) {
       $this->drupalGet($style_path . '/effects/' . $ieid);
       foreach ($effect_edits[$effect['name']] as $field => $value) {
-        $this->assertFieldByName($field, $value, t('The %field field in the %effect effect has the correct value of %value.', array('%field' => $field, '%effect' => $effect['name'], '%value' => $value)));
+        $this->assertFieldByName($field, $value, format_string('The %field field in the %effect effect has the correct value of %value.', array('%field' => $field, '%effect' => $effect['name'], '%value' => $value)));
       }
     }
 
@@ -506,7 +506,7 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
         $order_correct = FALSE;
       }
     }
-    $this->assertTrue($order_correct, t('The order of the effects is correctly set by default.'));
+    $this->assertTrue($order_correct, 'The order of the effects is correctly set by default.');
 
     // Test the style overview form.
     // Change the name of the style and adjust the weights of effects.
@@ -522,7 +522,7 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
 
     // Create an image to make sure it gets flushed after saving.
     $image_path = $this->createSampleImage($style);
-    $this->assertEqual($this->getImageCount($style), 1, t('Image style %style image %file successfully generated.', array('%style' => $style['name'], '%file' => $image_path)));
+    $this->assertEqual($this->getImageCount($style), 1, format_string('Image style %style image %file successfully generated.', array('%style' => $style['name'], '%file' => $image_path)));
 
     $this->drupalPost($style_path, $edit, t('Update style'));
 
@@ -531,12 +531,12 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
 
     // Check that the URL was updated.
     $this->drupalGet($style_path);
-    $this->assertResponse(200, t('Image style %original renamed to %new', array('%original' => $style['name'], '%new' => $style_name)));
+    $this->assertResponse(200, format_string('Image style %original renamed to %new', array('%original' => $style['name'], '%new' => $style_name)));
 
     // Check that the image was flushed after updating the style.
     // This is especially important when renaming the style. Make sure that
     // the old image directory has been deleted.
-    $this->assertEqual($this->getImageCount($style), 0, t('Image style %style was flushed after renaming the style and updating the order of effects.', array('%style' => $style['name'])));
+    $this->assertEqual($this->getImageCount($style), 0, format_string('Image style %style was flushed after renaming the style and updating the order of effects.', array('%style' => $style['name'])));
 
     // Load the style by the new name with the new weights.
     drupal_static_reset('image_styles');
@@ -551,18 +551,18 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
         $order_correct = FALSE;
       }
     }
-    $this->assertTrue($order_correct, t('The order of the effects is correctly set by default.'));
+    $this->assertTrue($order_correct, 'The order of the effects is correctly set by default.');
 
     // Image effect deletion form.
 
     // Create an image to make sure it gets flushed after deleting an effect.
     $image_path = $this->createSampleImage($style);
-    $this->assertEqual($this->getImageCount($style), 1, t('Image style %style image %file successfully generated.', array('%style' => $style['name'], '%file' => $image_path)));
+    $this->assertEqual($this->getImageCount($style), 1, format_string('Image style %style image %file successfully generated.', array('%style' => $style['name'], '%file' => $image_path)));
 
     // Test effect deletion form.
     $effect = array_pop($style['effects']);
     $this->drupalPost($style_path . '/effects/' . $effect['ieid'] . '/delete', array(), t('Delete'));
-    $this->assertRaw(t('The image effect %name has been deleted.', array('%name' => $effect['label'])), t('Image effect deleted.'));
+    $this->assertRaw(t('The image effect %name has been deleted.', array('%name' => $effect['label'])), 'Image effect deleted.');
 
     // Style deletion form.
 
@@ -571,10 +571,10 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
 
     // Confirm the style directory has been removed.
     $directory = file_default_scheme() . '://styles/' . $style_name;
-    $this->assertFalse(is_dir($directory), t('Image style %style directory removed on style deletion.', array('%style' => $style['name'])));
+    $this->assertFalse(is_dir($directory), format_string('Image style %style directory removed on style deletion.', array('%style' => $style['name'])));
 
     drupal_static_reset('image_styles');
-    $this->assertFalse(image_style_load($style_name), t('Image style %style successfully deleted.', array('%style' => $style['name'])));
+    $this->assertFalse(image_style_load($style_name), format_string('Image style %style successfully deleted.', array('%style' => $style['name'])));
 
   }
 
@@ -590,28 +590,28 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
 
     // Ensure deleting a default is not possible.
     $this->drupalGet($delete_path);
-    $this->assertText(t('Page not found'), t('Default styles may not be deleted.'));
+    $this->assertText(t('Page not found'), 'Default styles may not be deleted.');
 
     // Ensure that editing a default is not possible (without overriding).
     $this->drupalGet($edit_path);
-    $this->assertNoField('edit-name', t('Default styles may not be renamed.'));
-    $this->assertNoField('edit-submit', t('Default styles may not be edited.'));
-    $this->assertNoField('edit-add', t('Default styles may not have new effects added.'));
+    $this->assertNoField('edit-name', 'Default styles may not be renamed.');
+    $this->assertNoField('edit-submit', 'Default styles may not be edited.');
+    $this->assertNoField('edit-add', 'Default styles may not have new effects added.');
 
     // Create an image to make sure the default works before overriding.
     drupal_static_reset('image_styles');
     $style = image_style_load($style_name);
     $image_path = $this->createSampleImage($style);
-    $this->assertEqual($this->getImageCount($style), 1, t('Image style %style image %file successfully generated.', array('%style' => $style['name'], '%file' => $image_path)));
+    $this->assertEqual($this->getImageCount($style), 1, format_string('Image style %style image %file successfully generated.', array('%style' => $style['name'], '%file' => $image_path)));
 
     // Verify that effects attached to a default style do not have an ieid key.
     foreach ($style['effects'] as $effect) {
-      $this->assertFalse(isset($effect['ieid']), t('The %effect effect does not have an ieid.', array('%effect' => $effect['name'])));
+      $this->assertFalse(isset($effect['ieid']), format_string('The %effect effect does not have an ieid.', array('%effect' => $effect['name'])));
     }
 
     // Override the default.
     $this->drupalPost($edit_path, array(), t('Override defaults'));
-    $this->assertRaw(t('The %style style has been overridden, allowing you to change its settings.', array('%style' => $style_name)), t('Default image style may be overridden.'));
+    $this->assertRaw(t('The %style style has been overridden, allowing you to change its settings.', array('%style' => $style_name)), 'Default image style may be overridden.');
 
     // Add sample effect to the overridden style.
     $this->drupalPost($edit_path, array('new' => 'image_desaturate'), t('Add'));
@@ -620,22 +620,22 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
 
     // Verify that effects attached to the style have an ieid now.
     foreach ($style['effects'] as $effect) {
-      $this->assertTrue(isset($effect['ieid']), t('The %effect effect has an ieid.', array('%effect' => $effect['name'])));
+      $this->assertTrue(isset($effect['ieid']), format_string('The %effect effect has an ieid.', array('%effect' => $effect['name'])));
     }
 
     // The style should now have 2 effect, the original scale provided by core
     // and the desaturate effect we added in the override.
     $effects = array_values($style['effects']);
-    $this->assertEqual($effects[0]['name'], 'image_scale', t('The default effect still exists in the overridden style.'));
-    $this->assertEqual($effects[1]['name'], 'image_desaturate', t('The added effect exists in the overridden style.'));
+    $this->assertEqual($effects[0]['name'], 'image_scale', 'The default effect still exists in the overridden style.');
+    $this->assertEqual($effects[1]['name'], 'image_desaturate', 'The added effect exists in the overridden style.');
 
     // Check that we are unable to rename an overridden style.
     $this->drupalGet($edit_path);
-    $this->assertNoField('edit-name', t('Overridden styles may not be renamed.'));
+    $this->assertNoField('edit-name', 'Overridden styles may not be renamed.');
 
     // Create an image to ensure the override works properly.
     $image_path = $this->createSampleImage($style);
-    $this->assertEqual($this->getImageCount($style), 1, t('Image style %style image %file successfully generated.', array('%style' => $style['name'], '%file' => $image_path)));
+    $this->assertEqual($this->getImageCount($style), 1, format_string('Image style %style image %file successfully generated.', array('%style' => $style['name'], '%file' => $image_path)));
 
     // Revert the image style.
     $this->drupalPost($revert_path, array(), t('Revert'));
@@ -644,8 +644,8 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
 
     // The style should now have the single effect for scale.
     $effects = array_values($style['effects']);
-    $this->assertEqual($effects[0]['name'], 'image_scale', t('The default effect still exists in the reverted style.'));
-    $this->assertFalse(array_key_exists(1, $effects), t('The added effect has been removed in the reverted style.'));
+    $this->assertEqual($effects[0]['name'], 'image_scale', 'The default effect still exists in the reverted style.');
+    $this->assertFalse(array_key_exists(1, $effects), 'The added effect has been removed in the reverted style.');
   }
 
   /**
@@ -672,7 +672,7 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
 
     // Test that image is displayed using newly created style.
     $this->drupalGet('node/' . $nid);
-    $this->assertRaw(check_plain(image_style_url($style_name, $node->{$field_name}[LANGUAGE_NONE][0]['uri'])), t('Image displayed using style @style.', array('@style' => $style_name)));
+    $this->assertRaw(check_plain(image_style_url($style_name, $node->{$field_name}[LANGUAGE_NONE][0]['uri'])), format_string('Image displayed using style @style.', array('@style' => $style_name)));
 
     // Rename the style and make sure the image field is updated.
     $new_style_name = strtolower($this->randomName(10));
@@ -680,9 +680,9 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
       'name' => $new_style_name,
     );
     $this->drupalPost('admin/config/media/image-styles/edit/' . $style_name, $edit, t('Update style'));
-    $this->assertText(t('Changes to the style have been saved.'), t('Style %name was renamed to %new_name.', array('%name' => $style_name, '%new_name' => $new_style_name)));
+    $this->assertText(t('Changes to the style have been saved.'), format_string('Style %name was renamed to %new_name.', array('%name' => $style_name, '%new_name' => $new_style_name)));
     $this->drupalGet('node/' . $nid);
-    $this->assertRaw(check_plain(image_style_url($new_style_name, $node->{$field_name}[LANGUAGE_NONE][0]['uri'])), t('Image displayed using style replacement style.'));
+    $this->assertRaw(check_plain(image_style_url($new_style_name, $node->{$field_name}[LANGUAGE_NONE][0]['uri'])), format_string('Image displayed using style replacement style.'));
 
     // Delete the style and choose a replacement style.
     $edit = array(
@@ -693,7 +693,7 @@ class ImageAdminStylesUnitTest extends ImageFieldTestCase {
     $this->assertRaw($message, $message);
 
     $this->drupalGet('node/' . $nid);
-    $this->assertRaw(check_plain(image_style_url('thumbnail', $node->{$field_name}[LANGUAGE_NONE][0]['uri'])), t('Image displayed using style replacement style.'));
+    $this->assertRaw(check_plain(image_style_url('thumbnail', $node->{$field_name}[LANGUAGE_NONE][0]['uri'])), format_string('Image displayed using style replacement style.'));
   }
 }
 
@@ -744,7 +744,7 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
       'height' => 20,
     );
     $default_output = theme('image', $image_info);
-    $this->assertRaw($default_output, t('Default formatter displaying correctly on full node view.'));
+    $this->assertRaw($default_output, 'Default formatter displaying correctly on full node view.');
 
     // Test the image linked to file formatter.
     $instance = field_info_instance('node', $field_name, 'article');
@@ -753,20 +753,20 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
     field_update_instance($instance);
     $default_output = l(theme('image', $image_info), file_create_url($image_uri), array('html' => TRUE));
     $this->drupalGet('node/' . $nid);
-    $this->assertRaw($default_output, t('Image linked to file formatter displaying correctly on full node view.'));
+    $this->assertRaw($default_output, 'Image linked to file formatter displaying correctly on full node view.');
     // Verify that the image can be downloaded.
-    $this->assertEqual(file_get_contents($test_image->uri), $this->drupalGet(file_create_url($image_uri)), t('File was downloaded successfully.'));
+    $this->assertEqual(file_get_contents($test_image->uri), $this->drupalGet(file_create_url($image_uri)), 'File was downloaded successfully.');
     if ($scheme == 'private') {
       // Only verify HTTP headers when using private scheme and the headers are
       // sent by Drupal.
-      $this->assertEqual($this->drupalGetHeader('Content-Type'), 'image/png', t('Content-Type header was sent.'));
-      $this->assertEqual($this->drupalGetHeader('Content-Disposition'), 'inline; filename="' . $test_image->filename . '"', t('Content-Disposition header was sent.'));
-      $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'private', t('Cache-Control header was sent.'));
+      $this->assertEqual($this->drupalGetHeader('Content-Type'), 'image/png', 'Content-Type header was sent.');
+      $this->assertEqual($this->drupalGetHeader('Content-Disposition'), 'inline; filename="' . $test_image->filename . '"', 'Content-Disposition header was sent.');
+      $this->assertEqual($this->drupalGetHeader('Cache-Control'), 'private', 'Cache-Control header was sent.');
 
       // Log out and try to access the file.
       $this->drupalLogout();
       $this->drupalGet(file_create_url($image_uri));
-      $this->assertResponse('403', t('Access denied to original image as anonymous user.'));
+      $this->assertResponse('403', 'Access denied to original image as anonymous user.');
 
       // Log in again.
       $this->drupalLogin($this->admin_user);
@@ -777,7 +777,7 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
     field_update_instance($instance);
     $default_output = l(theme('image', $image_info), 'node/' . $nid, array('html' => TRUE, 'attributes' => array('class' => 'active')));
     $this->drupalGet('node/' . $nid);
-    $this->assertRaw($default_output, t('Image linked to content formatter displaying correctly on full node view.'));
+    $this->assertRaw($default_output, 'Image linked to content formatter displaying correctly on full node view.');
 
     // Test the image style 'thumbnail' formatter.
     $instance['display']['default']['settings']['image_link'] = '';
@@ -793,13 +793,13 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
     $image_info['height'] = 50;
     $default_output = theme('image', $image_info);
     $this->drupalGet('node/' . $nid);
-    $this->assertRaw($default_output, t('Image style thumbnail formatter displaying correctly on full node view.'));
+    $this->assertRaw($default_output, 'Image style thumbnail formatter displaying correctly on full node view.');
 
     if ($scheme == 'private') {
       // Log out and try to access the file.
       $this->drupalLogout();
       $this->drupalGet(image_style_url('thumbnail', $image_uri));
-      $this->assertResponse('403', t('Access denied to image style thumbnail as anonymous user.'));
+      $this->assertResponse('403', 'Access denied to image style thumbnail as anonymous user.');
     }
   }
 
@@ -828,16 +828,16 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
     $instance = field_info_instance('node', $field_name, 'article');
 
     $this->drupalGet('node/add/article');
-    $this->assertText(t('Files must be less than 50 KB.'), t('Image widget max file size is displayed on article form.'));
-    $this->assertText(t('Allowed file types: ' . $test_image_extension . '.'), t('Image widget allowed file types displayed on article form.'));
-    $this->assertText(t('Images must be between 10x10 and 100x100 pixels.'), t('Image widget allowed resolution displayed on article form.'));
+    $this->assertText(t('Files must be less than 50 KB.'), 'Image widget max file size is displayed on article form.');
+    $this->assertText(t('Allowed file types: ' . $test_image_extension . '.'), 'Image widget allowed file types displayed on article form.');
+    $this->assertText(t('Images must be between 10x10 and 100x100 pixels.'), 'Image widget allowed resolution displayed on article form.');
 
     // We have to create the article first and then edit it because the alt
     // and title fields do not display until the image has been attached.
     $nid = $this->uploadNodeImage($test_image, $field_name, 'article');
     $this->drupalGet('node/' . $nid . '/edit');
-    $this->assertFieldByName($field_name . '[' . LANGUAGE_NONE . '][0][alt]', '', t('Alt field displayed on article form.'));
-    $this->assertFieldByName($field_name . '[' . LANGUAGE_NONE . '][0][title]', '', t('Title field displayed on article form.'));
+    $this->assertFieldByName($field_name . '[' . LANGUAGE_NONE . '][0][alt]', '', 'Alt field displayed on article form.');
+    $this->assertFieldByName($field_name . '[' . LANGUAGE_NONE . '][0][title]', '', 'Title field displayed on article form.');
     // Verify that the attached image is being previewed using the 'medium'
     // style.
     $node = node_load($nid, NULL, TRUE);
@@ -847,7 +847,7 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
       'height' => 110,
     );
     $default_output = theme('image', $image_info);
-    $this->assertRaw($default_output, t("Preview image is displayed using 'medium' style."));
+    $this->assertRaw($default_output, "Preview image is displayed using 'medium' style.");
 
     // Add alt/title fields to the image and verify that they are displayed.
     $image_info = array(
@@ -863,7 +863,7 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
     );
     $this->drupalPost('node/' . $nid . '/edit', $edit, t('Save'));
     $default_output = theme('image', $image_info);
-    $this->assertRaw($default_output, t('Image displayed using user supplied alt and title attributes.'));
+    $this->assertRaw($default_output, 'Image displayed using user supplied alt and title attributes.');
 
     // Verify that alt/title longer than allowed results in a validation error.
     $test_size = 2000;
@@ -896,7 +896,7 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
         'title' => t('Image field formatter'),
       ),
     ));
-    $this->assertTrue(stripos($image, 'testFound') > 0, t('Image field formatters can have attributes.'));
+    $this->assertTrue(stripos($image, 'testFound') > 0, 'Image field formatters can have attributes.');
   }
 
   /**
@@ -913,7 +913,7 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
     $this->drupalGet('node/' . $node->nid);
     // Verify that no image is displayed on the page by checking for the class
     // that would be used on the image field.
-    $this->assertNoPattern('<div class="(.*?)field-name-' . strtr($field_name, '_', '-') . '(.*?)">', t('No image displayed when no image is attached and no default image specified.'));
+    $this->assertNoPattern('<div class="(.*?)field-name-' . strtr($field_name, '_', '-') . '(.*?)">', 'No image displayed when no image is attached and no default image specified.');
 
     // Add a default image to the public imagefield instance.
     $images = $this->drupalGetTestFiles('image');
@@ -925,10 +925,10 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
     field_info_cache_clear();
     $field = field_info_field($field_name);
     $image = file_load($field['settings']['default_image']);
-    $this->assertTrue($image->status == FILE_STATUS_PERMANENT, t('The default image status is permanent.'));
+    $this->assertTrue($image->status == FILE_STATUS_PERMANENT, 'The default image status is permanent.');
     $default_output = theme('image', array('path' => $image->uri));
     $this->drupalGet('node/' . $node->nid);
-    $this->assertRaw($default_output, t('Default image displayed when no user supplied image is present.'));
+    $this->assertRaw($default_output, 'Default image displayed when no user supplied image is present.');
 
     // Create a node with an image attached and ensure that the default image
     // is not displayed.
@@ -941,8 +941,8 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
     );
     $image_output = theme('image', $image_info);
     $this->drupalGet('node/' . $nid);
-    $this->assertNoRaw($default_output, t('Default image is not displayed when user supplied image is present.'));
-    $this->assertRaw($image_output, t('User supplied image is displayed.'));
+    $this->assertNoRaw($default_output, 'Default image is not displayed when user supplied image is present.');
+    $this->assertRaw($image_output, 'User supplied image is displayed.');
 
     // Remove default image from the field and make sure it is no longer used.
     $edit = array(
@@ -952,7 +952,7 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
     // Clear field info cache so the new default image is detected.
     field_info_cache_clear();
     $field = field_info_field($field_name);
-    $this->assertFalse($field['settings']['default_image'], t('Default image removed from field.'));
+    $this->assertFalse($field['settings']['default_image'], 'Default image removed from field.');
     // Create an image field that uses the private:// scheme and test that the
     // default image works as expected.
     $private_field_name = strtolower($this->randomName());
@@ -964,14 +964,14 @@ class ImageFieldDisplayTestCase extends ImageFieldTestCase {
     $this->drupalPost('admin/structure/types/manage/article/fields/' . $private_field_name, $edit, t('Save settings'));
     $private_field = field_info_field($private_field_name);
     $image = file_load($private_field['settings']['default_image']);
-    $this->assertEqual('private', file_uri_scheme($image->uri), t('Default image uses private:// scheme.'));
-    $this->assertTrue($image->status == FILE_STATUS_PERMANENT, t('The default image status is permanent.'));
+    $this->assertEqual('private', file_uri_scheme($image->uri), 'Default image uses private:// scheme.');
+    $this->assertTrue($image->status == FILE_STATUS_PERMANENT, 'The default image status is permanent.');
     // Create a new node with no image attached and ensure that default private
     // image is displayed.
     $node = $this->drupalCreateNode(array('type' => 'article'));
     $default_output = theme('image', array('path' => $image->uri));
     $this->drupalGet('node/' . $node->nid);
-    $this->assertRaw($default_output, t('Default private image displayed when no user supplied image is present.'));
+    $this->assertRaw($default_output, 'Default private image displayed when no user supplied image is present.');
   }
 }
 
@@ -1017,9 +1017,9 @@ class ImageFieldValidateTestCase extends ImageFieldTestCase {
       }
     }
     $nid = $this->uploadNodeImage($image_that_is_too_small, $field_name, 'article');
-    $this->assertText(t('The specified file ' . $image_that_is_too_small->filename . ' could not be uploaded. The image is too small; the minimum dimensions are 50x50 pixels.'), t('Node save failed when minimum image resolution was not met.'));
+    $this->assertText(t('The specified file ' . $image_that_is_too_small->filename . ' could not be uploaded. The image is too small; the minimum dimensions are 50x50 pixels.'), 'Node save failed when minimum image resolution was not met.');
     $nid = $this->uploadNodeImage($image_that_is_too_big, $field_name, 'article');
-    $this->assertText(t('The image was resized to fit within the maximum allowed dimensions of 100x100 pixels.'), t('Image exceeding max resolution was properly resized.'));
+    $this->assertText(t('The image was resized to fit within the maximum allowed dimensions of 100x100 pixels.'), 'Image exceeding max resolution was properly resized.');
   }
 }
 
@@ -1074,14 +1074,14 @@ class ImageDimensionsTestCase extends DrupalWebTestCase {
 
     image_effect_save($effect);
     $img_tag = theme_image_style($variables);
-    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="120" height="60" alt="" />', t('Expected img tag was found.'));
-    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
+    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="120" height="60" alt="" />', 'Expected img tag was found.');
+    $this->assertFalse(file_exists($generated_uri), 'Generated file does not exist.');
     $this->drupalGet($url);
-    $this->assertResponse(200, t('Image was generated at the URL.'));
-    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
+    $this->assertResponse(200, 'Image was generated at the URL.');
+    $this->assertTrue(file_exists($generated_uri), 'Generated file does exist after we accessed it.');
     $image_info = image_get_info($generated_uri);
-    $this->assertEqual($image_info['width'], 120, t('Expected width was found.'));
-    $this->assertEqual($image_info['height'], 60, t('Expected height was found.'));
+    $this->assertEqual($image_info['width'], 120, 'Expected width was found.');
+    $this->assertEqual($image_info['height'], 60, 'Expected height was found.');
 
     // Rotate 90 degrees anticlockwise.
     $effect = array(
@@ -1095,14 +1095,14 @@ class ImageDimensionsTestCase extends DrupalWebTestCase {
 
     image_effect_save($effect);
     $img_tag = theme_image_style($variables);
-    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="60" height="120" alt="" />', t('Expected img tag was found.'));
-    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
+    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="60" height="120" alt="" />', 'Expected img tag was found.');
+    $this->assertFalse(file_exists($generated_uri), 'Generated file does not exist.');
     $this->drupalGet($url);
-    $this->assertResponse(200, t('Image was generated at the URL.'));
-    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
+    $this->assertResponse(200, 'Image was generated at the URL.');
+    $this->assertTrue(file_exists($generated_uri), 'Generated file does exist after we accessed it.');
     $image_info = image_get_info($generated_uri);
-    $this->assertEqual($image_info['width'], 60, t('Expected width was found.'));
-    $this->assertEqual($image_info['height'], 120, t('Expected height was found.'));
+    $this->assertEqual($image_info['width'], 60, 'Expected width was found.');
+    $this->assertEqual($image_info['height'], 120, 'Expected height was found.');
 
     // Scale an image that is higher than it is wide (rotated by previous effect).
     $effect = array(
@@ -1117,14 +1117,14 @@ class ImageDimensionsTestCase extends DrupalWebTestCase {
 
     image_effect_save($effect);
     $img_tag = theme_image_style($variables);
-    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="45" height="90" alt="" />', t('Expected img tag was found.'));
-    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
+    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="45" height="90" alt="" />', 'Expected img tag was found.');
+    $this->assertFalse(file_exists($generated_uri), 'Generated file does not exist.');
     $this->drupalGet($url);
-    $this->assertResponse(200, t('Image was generated at the URL.'));
-    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
+    $this->assertResponse(200, 'Image was generated at the URL.');
+    $this->assertTrue(file_exists($generated_uri), 'Generated file does exist after we accessed it.');
     $image_info = image_get_info($generated_uri);
-    $this->assertEqual($image_info['width'], 45, t('Expected width was found.'));
-    $this->assertEqual($image_info['height'], 90, t('Expected height was found.'));
+    $this->assertEqual($image_info['width'], 45, 'Expected width was found.');
+    $this->assertEqual($image_info['height'], 90, 'Expected height was found.');
 
     // Test upscale disabled.
     $effect = array(
@@ -1139,14 +1139,14 @@ class ImageDimensionsTestCase extends DrupalWebTestCase {
 
     image_effect_save($effect);
     $img_tag = theme_image_style($variables);
-    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="45" height="90" alt="" />', t('Expected img tag was found.'));
-    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
+    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="45" height="90" alt="" />', 'Expected img tag was found.');
+    $this->assertFalse(file_exists($generated_uri), 'Generated file does not exist.');
     $this->drupalGet($url);
-    $this->assertResponse(200, t('Image was generated at the URL.'));
-    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
+    $this->assertResponse(200, 'Image was generated at the URL.');
+    $this->assertTrue(file_exists($generated_uri), 'Generated file does exist after we accessed it.');
     $image_info = image_get_info($generated_uri);
-    $this->assertEqual($image_info['width'], 45, t('Expected width was found.'));
-    $this->assertEqual($image_info['height'], 90, t('Expected height was found.'));
+    $this->assertEqual($image_info['width'], 45, 'Expected width was found.');
+    $this->assertEqual($image_info['height'], 90, 'Expected height was found.');
 
     // Add a desaturate effect.
     $effect = array(
@@ -1157,14 +1157,14 @@ class ImageDimensionsTestCase extends DrupalWebTestCase {
 
     image_effect_save($effect);
     $img_tag = theme_image_style($variables);
-    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="45" height="90" alt="" />', t('Expected img tag was found.'));
-    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
+    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="45" height="90" alt="" />', 'Expected img tag was found.');
+    $this->assertFalse(file_exists($generated_uri), 'Generated file does not exist.');
     $this->drupalGet($url);
-    $this->assertResponse(200, t('Image was generated at the URL.'));
-    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
+    $this->assertResponse(200, 'Image was generated at the URL.');
+    $this->assertTrue(file_exists($generated_uri), 'Generated file does exist after we accessed it.');
     $image_info = image_get_info($generated_uri);
-    $this->assertEqual($image_info['width'], 45, t('Expected width was found.'));
-    $this->assertEqual($image_info['height'], 90, t('Expected height was found.'));
+    $this->assertEqual($image_info['width'], 45, 'Expected width was found.');
+    $this->assertEqual($image_info['height'], 90, 'Expected height was found.');
 
     // Add a random rotate effect.
     $effect = array(
@@ -1178,11 +1178,11 @@ class ImageDimensionsTestCase extends DrupalWebTestCase {
 
     image_effect_save($effect);
     $img_tag = theme_image_style($variables);
-    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" alt="" />', t('Expected img tag was found.'));
-    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
+    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" alt="" />', 'Expected img tag was found.');
+    $this->assertFalse(file_exists($generated_uri), 'Generated file does not exist.');
     $this->drupalGet($url);
-    $this->assertResponse(200, t('Image was generated at the URL.'));
-    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
+    $this->assertResponse(200, 'Image was generated at the URL.');
+    $this->assertTrue(file_exists($generated_uri), 'Generated file does exist after we accessed it.');
 
 
     // Add a crop effect.
@@ -1198,14 +1198,14 @@ class ImageDimensionsTestCase extends DrupalWebTestCase {
 
     image_effect_save($effect);
     $img_tag = theme_image_style($variables);
-    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="30" height="30" alt="" />', t('Expected img tag was found.'));
-    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
+    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" width="30" height="30" alt="" />', 'Expected img tag was found.');
+    $this->assertFalse(file_exists($generated_uri), 'Generated file does not exist.');
     $this->drupalGet($url);
-    $this->assertResponse(200, t('Image was generated at the URL.'));
-    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
+    $this->assertResponse(200, 'Image was generated at the URL.');
+    $this->assertTrue(file_exists($generated_uri), 'Generated file does exist after we accessed it.');
     $image_info = image_get_info($generated_uri);
-    $this->assertEqual($image_info['width'], 30, t('Expected width was found.'));
-    $this->assertEqual($image_info['height'], 30, t('Expected height was found.'));
+    $this->assertEqual($image_info['width'], 30, 'Expected width was found.');
+    $this->assertEqual($image_info['height'], 30, 'Expected height was found.');
 
     // Rotate to a non-multiple of 90 degrees.
     $effect = array(
@@ -1219,11 +1219,11 @@ class ImageDimensionsTestCase extends DrupalWebTestCase {
 
     $effect = image_effect_save($effect);
     $img_tag = theme_image_style($variables);
-    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" alt="" />', t('Expected img tag was found.'));
-    $this->assertFalse(file_exists($generated_uri), t('Generated file does not exist.'));
+    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" alt="" />', 'Expected img tag was found.');
+    $this->assertFalse(file_exists($generated_uri), 'Generated file does not exist.');
     $this->drupalGet($url);
-    $this->assertResponse(200, t('Image was generated at the URL.'));
-    $this->assertTrue(file_exists($generated_uri), t('Generated file does exist after we accessed it.'));
+    $this->assertResponse(200, 'Image was generated at the URL.');
+    $this->assertTrue(file_exists($generated_uri), 'Generated file does exist after we accessed it.');
 
     image_effect_delete($effect);
 
@@ -1237,7 +1237,7 @@ class ImageDimensionsTestCase extends DrupalWebTestCase {
 
     image_effect_save($effect);
     $img_tag = theme_image_style($variables);
-    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" alt="" />', t('Expected img tag was found.'));
+    $this->assertEqual($img_tag, '<img typeof="foaf:Image" src="' . check_plain($url) . '" alt="" />', 'Expected img tag was found.');
   }
 }
 
@@ -1371,13 +1371,13 @@ class ImageDimensionsScaleTestCase extends DrupalUnitTestCase {
       $return_value = image_dimensions_scale($test['input']['dimensions'], $test['input']['width'], $test['input']['height'], $test['input']['upscale']);
 
       // Check the width.
-      $this->assertEqual($test['output']['dimensions']['width'], $test['input']['dimensions']['width'], t('Computed width (@computed_width) equals expected width (@expected_width)', array('@computed_width' => $test['output']['dimensions']['width'], '@expected_width' => $test['input']['dimensions']['width'])));
+      $this->assertEqual($test['output']['dimensions']['width'], $test['input']['dimensions']['width'], format_string('Computed width (@computed_width) equals expected width (@expected_width)', array('@computed_width' => $test['output']['dimensions']['width'], '@expected_width' => $test['input']['dimensions']['width'])));
 
       // Check the height.
-      $this->assertEqual($test['output']['dimensions']['height'], $test['input']['dimensions']['height'], t('Computed height (@computed_height) equals expected height (@expected_height)', array('@computed_height' => $test['output']['dimensions']['height'], '@expected_height' => $test['input']['dimensions']['height'])));
+      $this->assertEqual($test['output']['dimensions']['height'], $test['input']['dimensions']['height'], format_string('Computed height (@computed_height) equals expected height (@expected_height)', array('@computed_height' => $test['output']['dimensions']['height'], '@expected_height' => $test['input']['dimensions']['height'])));
 
       // Check the return value.
-      $this->assertEqual($test['output']['return_value'], $return_value, t('Correct return value.'));
+      $this->assertEqual($test['output']['return_value'], $return_value, 'Correct return value.');
     }
   }
 }
