diff --git a/tests/unit/framework/requirements/YiiRequirementCheckerTest.php b/tests/unit/framework/requirements/YiiRequirementCheckerTest.php
index 66a81b7..3dc8265 100644
--- a/tests/unit/framework/requirements/YiiRequirementCheckerTest.php
+++ b/tests/unit/framework/requirements/YiiRequirementCheckerTest.php
@@ -46,16 +46,20 @@ class YiiRequirementCheckerTest extends TestCase
 		$this->assertEquals(1, $summary['warnings'], 'Wrong summary warnings!');
 
 		$checkedRequirements = $checkResult['requirements'];
+		$requirementsKeys = array_flip(array_keys($requirements));
 
-		$this->assertEquals(false, $checkedRequirements['requirementPass']['error'], 'Passed requirement has an error!');
-		$this->assertEquals(false, $checkedRequirements['requirementPass']['warning'], 'Passed requirement has a warning!');
+		$this->assertEquals(false, $checkedRequirements[$requirementsKeys['requirementPass']]['error'], 'Passed requirement has an error!');
+		$this->assertEquals(false, $checkedRequirements[$requirementsKeys['requirementPass']]['warning'], 'Passed requirement has a warning!');
 
-		$this->assertEquals(true, $checkedRequirements['requirementError']['error'], 'Error requirement has no error!');
+		$this->assertEquals(true, $checkedRequirements[$requirementsKeys['requirementError']]['error'], 'Error requirement has no error!');
 
-		$this->assertEquals(false, $checkedRequirements['requirementWarning']['error'], 'Error requirement has an error!');
-		$this->assertEquals(true, $checkedRequirements['requirementWarning']['warning'], 'Error requirement has no warning!');
+		$this->assertEquals(false, $checkedRequirements[$requirementsKeys['requirementWarning']]['error'], 'Error requirement has an error!');
+		$this->assertEquals(true, $checkedRequirements[$requirementsKeys['requirementWarning']]['warning'], 'Error requirement has no warning!');
 	}
 
+	/**
+	 * @depends testCheck
+	 */
 	public function testCheckEval() {
 		$requirementsChecker = new YiiRequirementChecker();
 
@@ -78,10 +82,46 @@ class YiiRequirementCheckerTest extends TestCase
 
 		$checkResult = $requirementsChecker->check($requirements)->getResult();
 		$checkedRequirements = $checkResult['requirements'];
+		$requirementsKeys = array_flip(array_keys($requirements));
 
-		$this->assertEquals(false, $checkedRequirements['requirementPass']['error'], 'Passed requirement has an error!');
-		$this->assertEquals(false, $checkedRequirements['requirementPass']['warning'], 'Passed requirement has a warning!');
+		$this->assertEquals(false, $checkedRequirements[$requirementsKeys['requirementPass']]['error'], 'Passed requirement has an error!');
+		$this->assertEquals(false, $checkedRequirements[$requirementsKeys['requirementPass']]['warning'], 'Passed requirement has a warning!');
 
-		$this->assertEquals(true, $checkedRequirements['requirementError']['error'], 'Error requirement has no error!');
+		$this->assertEquals(true, $checkedRequirements[$requirementsKeys['requirementError']]['error'], 'Error requirement has no error!');
+	}
+
+	/**
+	 * @depends testCheck
+	 */
+	public function testCheckChained()
+	{
+		$requirementsChecker = new YiiRequirementChecker();
+
+		$requirements1 = array(
+			array(
+				'name' => 'Requirement 1',
+				'mandatory' => true,
+				'condition' => true,
+				'by' => 'Requirement 1',
+				'memo' => 'Requirement 1',
+			),
+		);
+		$requirements2 = array(
+			array(
+				'name' => 'Requirement 2',
+				'mandatory' => true,
+				'condition' => true,
+				'by' => 'Requirement 2',
+				'memo' => 'Requirement 2',
+			),
+		);
+		$checkResult = $requirementsChecker->check($requirements1)->check($requirements2)->getResult();
+
+		$mergedRequirements = array_merge($requirements1, $requirements2);
+
+		$this->assertEquals(count($mergedRequirements), $checkResult['summary']['total'], 'Wrong total checks count!');
+		foreach ($mergedRequirements as $key => $mergedRequirement) {
+			$this->assertEquals($mergedRequirement['name'], $checkResult['requirements'][$key]['name'], 'Wrong requirements list!');
+		}
 	}
 }
diff --git a/yii/requirements/YiiRequirementChecker.php b/yii/requirements/YiiRequirementChecker.php
index 46fe106..26cb041 100644
--- a/yii/requirements/YiiRequirementChecker.php
+++ b/yii/requirements/YiiRequirementChecker.php
@@ -15,41 +15,47 @@
  */
 class YiiRequirementChecker
 {
+	/**
+	 * Check the given requirements, collecting results into internal field.
+	 * This method can be invoked several times checking different requirement sets.
+	 * Use {@link getResult()} or {@link render()} to get the results.
+	 * @param array $requirements requirements to be checked.
+	 * @return YiiRequirementChecker self instance.
+	 */
 	function check($requirements)
 	{
 		if (!is_array($requirements)) {
 			$this->usageError("Requirements must be an array!");
 		}
-		$summary = array(
-			'total' => 0,
-			'errors' => 0,
-			'warnings' => 0,
-		);
+		if (!isset($this->result)) {
+			$this->result = array(
+				'summary' => array(
+					'total' => 0,
+					'errors' => 0,
+					'warnings' => 0,
+				),
+				'requirements' => array(),
+			);
+		}
 		foreach ($requirements as $key => $rawRequirement) {
 			$requirement = $this->normalizeRequirement($rawRequirement, $key);
-
-			$summary['total']++;
+			$this->result['summary']['total']++;
 			if (!$requirement['condition']) {
 				if ($requirement['mandatory']) {
 					$requirement['error'] = true;
 					$requirement['warning'] = true;
-					$summary['errors']++;
+					$this->result['summary']['errors']++;
 				} else {
 					$requirement['error'] = false;
 					$requirement['warning'] = true;
-					$summary['warnings']++;
+					$this->result['summary']['warnings']++;
 				}
 			} else {
 				$requirement['error'] = false;
 				$requirement['warning'] = false;
 			}
-			$requirements[$key] = $requirement;
+			$this->result['requirements'][] = $requirement;
 		}
-		$result = array(
-			'summary' => $summary,
-			'requirements' => $requirements,
-		);
-		$this->result = $result;
 		return $this;
 	}