diff --git a/src/Meritoo/Common/Exception/File/NotExistingFileException.php b/src/Meritoo/Common/Exception/File/NotExistingFileException.php
index d870881..51c6fa3 100644
--- a/src/Meritoo/Common/Exception/File/NotExistingFileException.php
+++ b/src/Meritoo/Common/Exception/File/NotExistingFileException.php
@@ -23,7 +23,7 @@ class NotExistingFileException extends \Exception
      */
     public function __construct($notExistingFilePath)
     {
-        $template = 'File with path \'%s\' does not exist (or is not readable). Did you provide proper path of file?';
+        $template = 'File with path \'%s\' does not exist (or is not readable). Did you provide path of proper file?';
         $message = sprintf($template, $notExistingFilePath);
 
         parent::__construct($message);
diff --git a/src/Meritoo/Common/Exception/Reflection/CannotResolveClassNameException.php b/src/Meritoo/Common/Exception/Reflection/CannotResolveClassNameException.php
index 8c1135c..21708a2 100644
--- a/src/Meritoo/Common/Exception/Reflection/CannotResolveClassNameException.php
+++ b/src/Meritoo/Common/Exception/Reflection/CannotResolveClassNameException.php
@@ -21,7 +21,7 @@ class CannotResolveClassNameException extends Exception
     /**
      * Class constructor
      *
-     * @param array|object|string $source   Source of the class's / trait's name. It cane be an array of objects,
+     * @param array|object|string $source   Source of the class's / trait's name. It can be an array of objects,
      *                                      namespaces, object or namespace.
      * @param bool                $forClass (optional) If is set to true, message of this exception for class is
      *                                      prepared. Otherwise - for trait.
diff --git a/tests/Meritoo/Common/Test/Collection/CollectionTest.php b/tests/Meritoo/Common/Test/Collection/CollectionTest.php
index 9fa0309..60a4479 100644
--- a/tests/Meritoo/Common/Test/Collection/CollectionTest.php
+++ b/tests/Meritoo/Common/Test/Collection/CollectionTest.php
@@ -14,7 +14,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Type\OopVisibilityType;
 
 /**
- * Tests of the collection of elements
+ * Test case of the collection of elements
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Exception/Base/UnknownTypeExceptionTest.php b/tests/Meritoo/Common/Test/Exception/Base/UnknownTypeExceptionTest.php
index bda5702..815e0c6 100644
--- a/tests/Meritoo/Common/Test/Exception/Base/UnknownTypeExceptionTest.php
+++ b/tests/Meritoo/Common/Test/Exception/Base/UnknownTypeExceptionTest.php
@@ -13,7 +13,7 @@ use Meritoo\Common\Type\Base\BaseType;
 use PHPUnit\Framework\TestCase;
 
 /**
- * Tests of the exception used while type of something is unknown
+ * Test case of the exception used while type of something is unknown
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Type/Base/BaseTypeTest.php b/tests/Meritoo/Common/Test/Type/Base/BaseTypeTest.php
index 0169ff3..e7d1cea 100644
--- a/tests/Meritoo/Common/Test/Type/Base/BaseTypeTest.php
+++ b/tests/Meritoo/Common/Test/Type/Base/BaseTypeTest.php
@@ -13,7 +13,7 @@ use Meritoo\Common\Type\Base\BaseType;
 use PHPUnit\Framework\TestCase;
 
 /**
- * Tests of the base / abstract type of something
+ * Test case of the base / abstract type of something
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Type/DatePartTypeTest.php b/tests/Meritoo/Common/Test/Type/DatePartTypeTest.php
index 3571621..126c5ef 100644
--- a/tests/Meritoo/Common/Test/Type/DatePartTypeTest.php
+++ b/tests/Meritoo/Common/Test/Type/DatePartTypeTest.php
@@ -12,7 +12,7 @@ use Meritoo\Common\Test\Base\BaseTypeTestCase;
 use Meritoo\Common\Type\DatePartType;
 
 /**
- * Tests of the type of date part, e.g. "year"
+ * Test case of the type of date part, e.g. "year"
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/ArraysTest.php b/tests/Meritoo/Common/Test/Utilities/ArraysTest.php
index b7df01d..88fdd98 100644
--- a/tests/Meritoo/Common/Test/Utilities/ArraysTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/ArraysTest.php
@@ -12,7 +12,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Arrays;
 
 /**
- * Tests of the useful arrays methods
+ * Test case of the useful arrays methods
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/BundleTest.php b/tests/Meritoo/Common/Test/Utilities/BundleTest.php
index a5eb060..e78d279 100644
--- a/tests/Meritoo/Common/Test/Utilities/BundleTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/BundleTest.php
@@ -12,7 +12,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Bundle;
 
 /**
- * Tests of the useful methods for bundle
+ * Test case of the useful methods for bundle
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/ComposerTest.php b/tests/Meritoo/Common/Test/Utilities/ComposerTest.php
index eee6eed..d92fa01 100644
--- a/tests/Meritoo/Common/Test/Utilities/ComposerTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/ComposerTest.php
@@ -13,7 +13,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Composer;
 
 /**
- * Tests of the useful Composer-related methods
+ * Test case of the useful Composer-related methods
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/DatePeriodTest.php b/tests/Meritoo/Common/Test/Utilities/DatePeriodTest.php
index af8ff69..ba5a06b 100644
--- a/tests/Meritoo/Common/Test/Utilities/DatePeriodTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/DatePeriodTest.php
@@ -15,7 +15,7 @@ use Meritoo\Common\Type\OopVisibilityType;
 use Meritoo\Common\Utilities\DatePeriod;
 
 /**
- * Tests of date's period
+ * Test case of date's period
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/DateTest.php b/tests/Meritoo/Common/Test/Utilities/DateTest.php
index b175974..71644dc 100644
--- a/tests/Meritoo/Common/Test/Utilities/DateTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/DateTest.php
@@ -16,7 +16,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Date;
 
 /**
- * Tests of the Date methods (only static functions)
+ * Test case of the Date methods (only static functions)
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/GeneratorUtilityTest.php b/tests/Meritoo/Common/Test/Utilities/GeneratorUtilityTest.php
index 25ff700..ba29f66 100644
--- a/tests/Meritoo/Common/Test/Utilities/GeneratorUtilityTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/GeneratorUtilityTest.php
@@ -12,7 +12,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\GeneratorUtility;
 
 /**
- * Tests of the useful methods for the Generator class
+ * Test case of the useful methods for the Generator class
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/LocaleTest.php b/tests/Meritoo/Common/Test/Utilities/LocaleTest.php
index b28f18d..97e862f 100644
--- a/tests/Meritoo/Common/Test/Utilities/LocaleTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/LocaleTest.php
@@ -13,7 +13,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Locale;
 
 /**
- * Tests of the useful locale methods
+ * Test case of the useful locale methods
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/MimeTypesTest.php b/tests/Meritoo/Common/Test/Utilities/MimeTypesTest.php
index 164ace8..fb3eac4 100644
--- a/tests/Meritoo/Common/Test/Utilities/MimeTypesTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/MimeTypesTest.php
@@ -13,7 +13,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\MimeTypes;
 
 /**
- * Tests of the useful methods for mime types of files
+ * Test case of the useful methods for mime types of files
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/MiscellaneousTest.php b/tests/Meritoo/Common/Test/Utilities/MiscellaneousTest.php
index 1ace0da..13d8a0d 100644
--- a/tests/Meritoo/Common/Test/Utilities/MiscellaneousTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/MiscellaneousTest.php
@@ -17,7 +17,7 @@ use Meritoo\Common\Utilities\Miscellaneous;
 use stdClass;
 
 /**
- * Tests of the Miscellaneous methods (only static functions)
+ * Test case of the Miscellaneous methods (only static functions)
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/ReflectionTest.php b/tests/Meritoo/Common/Test/Utilities/ReflectionTest.php
index 27bdf66..c9d758c 100644
--- a/tests/Meritoo/Common/Test/Utilities/ReflectionTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/ReflectionTest.php
@@ -23,7 +23,7 @@ use Meritoo\Common\Utilities\Reflection;
 use ReflectionProperty;
 
 /**
- * Tests of the useful reflection methods
+ * Test case of the useful reflection methods
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/RegexTest.php b/tests/Meritoo/Common/Test/Utilities/RegexTest.php
index 78e7936..1e84afe 100644
--- a/tests/Meritoo/Common/Test/Utilities/RegexTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/RegexTest.php
@@ -11,7 +11,7 @@ namespace Meritoo\Common\Utilities;
 use Meritoo\Common\Test\Base\BaseTestCase;
 
 /**
- * Tests of the useful regular expressions methods
+ * Test case of the useful regular expressions methods
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/UriTest.php b/tests/Meritoo/Common/Test/Utilities/UriTest.php
index 88e1c99..f3bca9b 100644
--- a/tests/Meritoo/Common/Test/Utilities/UriTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/UriTest.php
@@ -12,7 +12,7 @@ use Meritoo\Common\Test\Base\BaseTestCase;
 use Meritoo\Common\Utilities\Uri;
 
 /**
- * Tests of the useful uri methods (only static functions)
+ * Test case of the useful uri methods (only static functions)
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl
diff --git a/tests/Meritoo/Common/Test/Utilities/XmlTest.php b/tests/Meritoo/Common/Test/Utilities/XmlTest.php
index 7b2c316..2942dac 100644
--- a/tests/Meritoo/Common/Test/Utilities/XmlTest.php
+++ b/tests/Meritoo/Common/Test/Utilities/XmlTest.php
@@ -13,7 +13,7 @@ use Meritoo\Common\Utilities\Xml;
 use SimpleXMLElement;
 
 /**
- * Tests of the useful XML-related methods (only static functions)
+ * Test case of the useful XML-related methods (only static functions)
  *
  * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
  * @copyright Meritoo.pl