diff --git a/src/Valitron/Validator.php b/src/Valitron/Validator.php
index dbc7d09..4496e2d 100644
--- a/src/Valitron/Validator.php
+++ b/src/Valitron/Validator.php
@@ -427,7 +427,7 @@ class Validator
             return false;
         }
 
-        $strict = false;
+        $strict = true;
         if (isset($params[1])) {
             $strict = (bool) $params[1];
         }
diff --git a/tests/Valitron/ValidateTest.php b/tests/Valitron/ValidateTest.php
index 5bbf54f..ac3ffca 100644
--- a/tests/Valitron/ValidateTest.php
+++ b/tests/Valitron/ValidateTest.php
@@ -703,14 +703,14 @@ class ValidateTest extends BaseTestCase
     public function testContainsValid()
     {
         $v = new Validator(array('test_string' => 'this is a Test'));
-        $v->rule('contains', 'test_string', 'a test');
+        $v->rule('contains', 'test_string', 'Test');
         $this->assertTrue($v->validate());
     }
 
-    public function testContainsStrictValid()
+    public function testContainsNonStrictValid()
     {
         $v = new Validator(array('test_string' => 'this is a Test'));
-        $v->rule('contains', 'test_string', 'Test', true);
+        $v->rule('contains', 'test_string', 'test', false);
         $this->assertTrue($v->validate());
     }
 
@@ -724,7 +724,7 @@ class ValidateTest extends BaseTestCase
     public function testContainsStrictNotFound()
     {
         $v = new Validator(array('test_string' => 'this is a Test'));
-        $v->rule('contains', 'test_string', 'test', true);
+        $v->rule('contains', 'test_string', 'test');
         $this->assertFalse($v->validate());
     }