diff --git a/Nethgui/Test/Unit/Nethgui/System/ValidatorTest.php b/Nethgui/Test/Unit/Nethgui/System/ValidatorTest.php
index 3def9a4d..1fdeac21 100644
--- a/Nethgui/Test/Unit/Nethgui/System/ValidatorTest.php
+++ b/Nethgui/Test/Unit/Nethgui/System/ValidatorTest.php
@@ -239,6 +239,9 @@ public function testInteger()
         $this->assertFalse($this->object->evaluate('123.0'));
         $this->assertFalse($this->object->evaluate('123.1'));
         $this->assertFalse($this->object->evaluate('a'));
+        $this->assertFalse($this->object->evaluate(' 1'));
+        $this->assertFalse($this->object->evaluate('01'));
+        $this->assertFalse($this->object->evaluate('1 '));
         $this->assertTrue($this->object->evaluate('-123'));
     }
 
@@ -253,6 +256,9 @@ public function testPositive()
         $this->assertFalse($this->object->evaluate('0'));
         $this->assertFalse($this->object->evaluate(FALSE));
         $this->assertFalse($this->object->evaluate(-1));
+        $this->assertFalse($this->object->evaluate('a'));
+        $this->assertFalse($this->object->evaluate(' 1.1'));
+        $this->assertFalse($this->object->evaluate('1 '));
     }
 
     public function testNegative()
@@ -298,6 +304,14 @@ public function testEqualTo()
         $this->assertFalse($this->object->evaluate('101'));
     }
 
+    public function testStringEqualTo()
+    {
+        $o = $this->object->equalTo('0');
+        $this->assertSame($this->object, $o);
+        $this->assertTrue($this->object->evaluate('0'));
+        $this->assertFalse($this->object->evaluate('00'));
+    }
+
     /**
      * @exp
      */