diff --git a/tests/framework/base/CSecurityManagerTest.php b/tests/framework/base/CSecurityManagerTest.php
index a01355f90c..1f16287c14 100644
--- a/tests/framework/base/CSecurityManagerTest.php
+++ b/tests/framework/base/CSecurityManagerTest.php
@@ -164,7 +164,7 @@ public function testGenerateRandomString()
 		// student-t test that the distribution of chars is uniform would be nice.
 		for ($i=1; $i<999; $i+=1){
 			$ran=$sm->generateRandomString($i,false);
-			$this->assertInternalType('string', $ran);
+			$this->assertIsString($ran);
 			$this->assertEquals(1, preg_match('{[a-zA-Z0-9_~]{' . $i . '}}', $ran));
 		}
 	}
@@ -176,7 +176,7 @@ public function testGenerateRandomBytes()
 		$mbStrlen = function_exists('mb_strlen');
 		for ($i=1; $i<255; $i+=1){
 			$ran=$sm->generateRandomBytes($i,false);
-			$this->assertInternalType('string', $ran);
+			$this->assertIsString($ran);
 			$this->assertEquals($i, $mbStrlen ? mb_strlen($ran, '8bit') : strlen($ran));
 		}
 	}
@@ -191,7 +191,7 @@ public function testGenerateRandomStringCS()
 		// student-t test that the distribution of chars is uniform would be nice.
 		for ($i=1; $i<999; $i+=1){
 			$ran=$sm->generateRandomString($i,true);
-			$this->assertInternalType('string', $ran);
+			$this->assertIsString($ran);
 			$this->assertEquals(1, preg_match('{[a-zA-Z0-9_~]{' . $i . '}}', $ran));
 		}
 	}
@@ -206,7 +206,7 @@ public function testGenerateRandomBytesCS()
 		$mbStrlen = function_exists('mb_strlen');
 		for ($i=1; $i<255; $i+=1){
 			$ran=$sm->generateRandomBytes($i,true);
-			$this->assertInternalType('string', $ran);
+			$this->assertIsString($ran);
 			$this->assertEquals($i, $mbStrlen ? mb_strlen($ran, '8bit') : strlen($ran));
 		}
 	}
diff --git a/tests/framework/validators/CCompareValidatorTest.php b/tests/framework/validators/CCompareValidatorTest.php
index 1bcbb889dd..fc146128f4 100644
--- a/tests/framework/validators/CCompareValidatorTest.php
+++ b/tests/framework/validators/CCompareValidatorTest.php
@@ -35,7 +35,7 @@ public function testValidationErrorsWithEquals()
 		$validator->operator = '=';
 		$validator->compareAttribute = 'bar';
 		$script = $validator->clientValidateAttribute($model, 'foo');
-		$this->assertInternalType('string', $script);
+		$this->assertIsString($script);
 		$this->assertContains('Foo must be repeated exactly.', $script);
 	}
 
@@ -65,7 +65,7 @@ public function testValidationErrorsWithNotEquals()
 		$validator->operator = '!=';
 		$validator->compareAttribute = 'bar';
 		$script = $validator->clientValidateAttribute($model, 'foo');
-		$this->assertInternalType('string', $script);
+		$this->assertIsString($script);
 		$this->assertContains('Foo must not be equal to \"{compareValue}\".".replace(\'{compareValue}\', ', $script);
 
 		$validator->message = '{compareAttribute}';
@@ -99,7 +99,7 @@ public function testValidationErrorsWitGreaterThan()
 		$validator->operator = '>';
 		$validator->compareAttribute = 'bar';
 		$script = $validator->clientValidateAttribute($model, 'foo');
-		$this->assertInternalType('string', $script);
+		$this->assertIsString($script);
 		$this->assertContains('Foo must be greater than \"{compareValue}\".".replace(\'{compareValue}\', ', $script);
 
 		$validator->message = '{compareAttribute}';
@@ -133,7 +133,7 @@ public function testValidationErrorsWitGreaterThanOrEqual()
 		$validator->operator = '>=';
 		$validator->compareAttribute = 'bar';
 		$script = $validator->clientValidateAttribute($model, 'foo');
-		$this->assertInternalType('string', $script);
+		$this->assertIsString($script);
 		$this->assertContains('Foo must be greater than or equal to \"{compareValue}\".".replace(\'{compareValue}\', ', $script);
 
 		$validator->message = '{compareAttribute}';
@@ -167,7 +167,7 @@ public function testValidationErrorsWitLessThan()
 		$validator->operator = '<';
 		$validator->compareAttribute = 'bar';
 		$script = $validator->clientValidateAttribute($model, 'foo');
-		$this->assertInternalType('string', $script);
+		$this->assertIsString($script);
 		$this->assertContains('Foo must be less than \"{compareValue}\".".replace(\'{compareValue}\', ', $script);
 
 		$validator->message = '{compareAttribute}';
@@ -201,7 +201,7 @@ public function testValidationErrorsWitLessThanOrEqual()
 		$validator->operator = '<=';
 		$validator->compareAttribute = 'bar';
 		$script = $validator->clientValidateAttribute($model, 'foo');
-		$this->assertInternalType('string', $script);
+		$this->assertIsString($script);
 		$this->assertContains('Foo must be less than or equal to \"{compareValue}\".".replace(\'{compareValue}\', ', $script);
 
 		$validator->message = '{compareAttribute}';
@@ -262,7 +262,7 @@ public function testOverrideCompareValue()
 		$validator->operator = '=';
 		$validator->compareValue = 'bar';
 		$script = $validator->clientValidateAttribute($stub, 'foo');
-		$this->assertInternalType('string', $script);
+		$this->assertIsString($script);
 		$this->assertContains('Foo must be repeated exactly', $script);
 	}
 
diff --git a/tests/framework/validators/CDateValidatorTest.php b/tests/framework/validators/CDateValidatorTest.php
index 653b80ca79..e7a3c69f5c 100644
--- a/tests/framework/validators/CDateValidatorTest.php
+++ b/tests/framework/validators/CDateValidatorTest.php
@@ -60,7 +60,7 @@ public function testTimestampOption()
         $model = $this->getModelMock(['timestampAttribute' => 'bar']);
         $model->foo = '01/01/2011';
         $this->assertTrue($model->validate());
-        $this->assertInternalType('integer', $model->bar);
+        $this->assertIsInteger($model->bar);
         $this->assertEquals(strtotime('1 Jan 2011'), $model->bar);
     }
 
diff --git a/tests/framework/web/CHttpSessionTest.php b/tests/framework/web/CHttpSessionTest.php
index 66de27b7f4..c2158ec3a0 100644
--- a/tests/framework/web/CHttpSessionTest.php
+++ b/tests/framework/web/CHttpSessionTest.php
@@ -5,7 +5,7 @@ class CHttpSessionTest extends CTestCase {
 	protected function checkProb($gcProb) {
 		Yii::app()->session->gCProbability = $gcProb;
 		$value = Yii::app()->session->gCProbability;
-		$this->assertInternalType('float', $value);
+		$this->assertIsFloat($value);
 		$this->assertLessThanOrEqual(1, $value);
 		$this->assertGreaterThanOrEqual(0, $value);
 		$this->assertLessThanOrEqual(1 / 21474836.47, abs($gcProb - $value));