diff --git a/src/Meritoo/Common/Test/Base/BaseTestCase.php b/src/Meritoo/Common/Test/Base/BaseTestCase.php
index 8faaf42..6a92bbe 100644
--- a/src/Meritoo/Common/Test/Base/BaseTestCase.php
+++ b/src/Meritoo/Common/Test/Base/BaseTestCase.php
@@ -12,7 +12,7 @@ use DateTime;
 use Generator;
 use Meritoo\Common\Exception\Type\UnknownOopVisibilityTypeException;
 use Meritoo\Common\Type\OopVisibilityType;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use ReflectionClass;
 use ReflectionMethod;
 
@@ -22,7 +22,7 @@ use ReflectionMethod;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-abstract class BaseTestCase extends PHPUnit_Framework_TestCase
+abstract class BaseTestCase extends TestCase
 {
     /**
      * Provides an empty value
diff --git a/tests/Meritoo/Common/Test/Exception/Base/UnknownTypeExceptionTest.php b/tests/Meritoo/Common/Test/Exception/Base/UnknownTypeExceptionTest.php
index 49739aa..bda5702 100644
--- a/tests/Meritoo/Common/Test/Exception/Base/UnknownTypeExceptionTest.php
+++ b/tests/Meritoo/Common/Test/Exception/Base/UnknownTypeExceptionTest.php
@@ -10,7 +10,7 @@ namespace Meritoo\Common\Test\Exception\Base;
 
 use Meritoo\Common\Exception\Base\UnknownTypeException;
 use Meritoo\Common\Type\Base\BaseType;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests of the exception used while type of something is unknown
@@ -18,7 +18,7 @@ use PHPUnit_Framework_TestCase;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class UnknownTypeExceptionTest extends PHPUnit_Framework_TestCase
+class UnknownTypeExceptionTest extends TestCase
 {
     public function testWithoutException()
     {
diff --git a/tests/Meritoo/Common/Test/Type/Base/BaseTypeTest.php b/tests/Meritoo/Common/Test/Type/Base/BaseTypeTest.php
index 2fb7576..0169ff3 100644
--- a/tests/Meritoo/Common/Test/Type/Base/BaseTypeTest.php
+++ b/tests/Meritoo/Common/Test/Type/Base/BaseTypeTest.php
@@ -10,7 +10,7 @@ namespace Meritoo\Common\Test\Type\Base;
 
 use Generator;
 use Meritoo\Common\Type\Base\BaseType;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests of the base / abstract type of something
@@ -18,7 +18,7 @@ use PHPUnit_Framework_TestCase;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class BaseTypeTest extends PHPUnit_Framework_TestCase
+class BaseTypeTest extends TestCase
 {
     /**
      * @param BaseType $type          Type of something
diff --git a/tests/Meritoo/Common/Test/Utilities/ArraysTest.php b/tests/Meritoo/Common/Test/Utilities/ArraysTest.php
index 40fbe9e..db135db 100644
--- a/tests/Meritoo/Common/Test/Utilities/ArraysTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/ArraysTest.php
@@ -9,7 +9,7 @@
 namespace Meritoo\Common\Test\Utilities;
 
 use Meritoo\Common\Utilities\Arrays;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests of the useful arrays methods
@@ -17,7 +17,7 @@ use PHPUnit_Framework_TestCase;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class ArraysTest extends PHPUnit_Framework_TestCase
+class ArraysTest extends TestCase
 {
     private $simpleArray;
     private $simpleArrayWithKeys;
diff --git a/tests/Meritoo/Common/Test/Utilities/BundleTest.php b/tests/Meritoo/Common/Test/Utilities/BundleTest.php
index ed6ee18..39d002c 100644
--- a/tests/Meritoo/Common/Test/Utilities/BundleTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/BundleTest.php
@@ -9,7 +9,7 @@
 namespace Meritoo\Common\Test\Utilities;
 
 use Meritoo\Common\Utilities\Bundle;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests of the useful methods for bundle
@@ -17,7 +17,7 @@ use PHPUnit_Framework_TestCase;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class BundleTest extends PHPUnit_Framework_TestCase
+class BundleTest extends TestCase
 {
     public function testGetBundleViewPathEmptyPathAndBundle()
     {
diff --git a/tests/Meritoo/Common/Test/Utilities/RegexTest.php b/tests/Meritoo/Common/Test/Utilities/RegexTest.php
index da76e8f..429bb27 100644
--- a/tests/Meritoo/Common/Test/Utilities/RegexTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/RegexTest.php
@@ -8,13 +8,15 @@
 
 namespace Meritoo\Common\Utilities;
 
+use PHPUnit\Framework\TestCase;
+
 /**
  * Tests of the useful regular expressions methods
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class RegexTest extends \PHPUnit_Framework_TestCase
+class RegexTest extends TestCase
 {
     private $simpleText;
 
diff --git a/tests/Meritoo/Common/Test/Utilities/XmlTest.php b/tests/Meritoo/Common/Test/Utilities/XmlTest.php
index 80fa091..168a81e 100644
--- a/tests/Meritoo/Common/Test/Utilities/XmlTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/XmlTest.php
@@ -9,7 +9,7 @@
 namespace Meritoo\Common\Test\Utilities;
 
 use Meritoo\Common\Utilities\Xml;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use SimpleXMLElement;
 
 /**
@@ -18,7 +18,7 @@ use SimpleXMLElement;
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
  */
-class XmlTest extends PHPUnit_Framework_TestCase
+class XmlTest extends TestCase
 {
     private $simpleXml;
     private $advancedXml;