diff --git a/core/modules/system/tests/theme.test b/core/modules/system/tests/theme.test
index 423ee71..c1ba08f 100644
--- a/core/modules/system/tests/theme.test
+++ b/core/modules/system/tests/theme.test
@@ -159,13 +159,13 @@ class ThemeUnitTest extends DrupalWebTestCase {
    * Ensures the theme registry is rebuilt when modules are disabled/enabled.
    */
   function testRegistryRebuild() {
-    $this->assertIdentical(theme('theme_test_foo', array('foo' => 'a')), 'a', t('The theme registry contains theme_test_foo.'));
+    $this->assertIdentical(theme('theme_test_foo', array('foo' => 'a')), 'a', 'The theme registry contains theme_test_foo.');
 
     module_disable(array('theme_test'), FALSE);
-    $this->assertIdentical(theme('theme_test_foo', array('foo' => 'b')), '', t('The theme registry does not contain theme_test_foo, because the module is disabled.'));
+    $this->assertIdentical(theme('theme_test_foo', array('foo' => 'b')), '', 'The theme registry does not contain theme_test_foo, because the module is disabled.');
 
     module_enable(array('theme_test'), FALSE);
-    $this->assertIdentical(theme('theme_test_foo', array('foo' => 'c')), 'c', t('The theme registry contains theme_test_foo again after re-enabling the module.'));
+    $this->assertIdentical(theme('theme_test_foo', array('foo' => 'c')), 'c', 'The theme registry contains theme_test_foo again after re-enabling the module.');
   }
 }