diff --git a/system/libraries/Unit_test.php b/system/libraries/Unit_test.php
index 0f6e2df..6ec2dcd 100644
--- a/system/libraries/Unit_test.php
+++ b/system/libraries/Unit_test.php
@@ -350,11 +350,11 @@
  */
 function is_true($test)
 {
-	return (is_bool($test) && $test === TRUE);
+	return ($test === TRUE);
 }
 function is_false($test)
 {
-	return (is_bool($test) && $test === FALSE);
+	return ($test === FALSE);
 }
 
 /* End of file Unit_test.php */