diff --git a/README.md b/README.md
index 9605985c..8b92c084 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![Latest Stable Version](https://poser.pugx.org/raml-org/raml-php-parser/version)](https://packagist.org/packages/raml-org/raml-php-parser)
 [![Total Downloads](https://poser.pugx.org/raml-org/raml-php-parser/downloads)](https://packagist.org/packages/raml-org/raml-php-parser)
 
-See the RAML spec here: https://github.com/raml-org/raml-spec
+See the [RAML specification](https://github.com/raml-org/raml-spec).
 
 ## RAML 0.8 Support
 For RAML 0.8 support follow version 2.
diff --git a/src/NamedParameter.php b/src/NamedParameter.php
index 27a35247..3220bc44 100644
--- a/src/NamedParameter.php
+++ b/src/NamedParameter.php
@@ -907,8 +907,7 @@ public function getMatchPattern()
 
                     break;
                 case self::TYPE_DATE:
-                    // @see https://snipt.net/DamienGarrido/
-                    //          http-date-regular-expression-validation-rfc-1123rfc-850asctime-f64e6aa3/
+                    // @see https://snipt.net/DamienGarrido/http-date-regular-expression-validation-rfc-1123rfc-850asctime-f64e6aa3/
                     $pattern = '^(?:(?:Mon|Tue|Wed|Thu|Fri|Sat|Sun), (?:[0-2][0-9]|3[01]) ' .
                         '(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) \d{4} ' .
                         '(?:[01][0-9]|2[0-3]):[012345][0-9]:[012345][0-9] ' .
diff --git a/src/Types/DatetimeType.php b/src/Types/DatetimeType.php
index dd31335f..67ac96a2 100644
--- a/src/Types/DatetimeType.php
+++ b/src/Types/DatetimeType.php
@@ -11,6 +11,7 @@
 class DatetimeType extends Type
 {
     const DEFAULT_FORMAT = DATE_RFC3339;
+
     /**
      * DateTime format to use
      *
@@ -23,7 +24,6 @@ class DatetimeType extends Type
      *
      * @param string $name
      * @param array $data
-     *
      * @return DatetimeType
      */
     public static function createFromArray($name, array $data = [])
diff --git a/src/Types/StringType.php b/src/Types/StringType.php
index 114687fa..4675b3f8 100644
--- a/src/Types/StringType.php
+++ b/src/Types/StringType.php
@@ -145,6 +145,8 @@ public function validate($value)
 
         if (!is_string($value)) {
             $this->errors[] = TypeValidationError::unexpectedValueType($this->getName(), 'string', $value);
+
+            return;
         }
         if (null !== $this->pattern) {
             $pregMatchResult = preg_match('/' . $this->pattern . '/', $value);
diff --git a/src/Types/TimeOnlyType.php b/src/Types/TimeOnlyType.php
index 5d006f51..a00617b1 100644
--- a/src/Types/TimeOnlyType.php
+++ b/src/Types/TimeOnlyType.php
@@ -15,9 +15,8 @@ class TimeOnlyType extends Type
     /**
      * Create a new TimeOnlyType from an array of data
      *
-     * @param string    $name
-     * @param array     $data
-     *
+     * @param string $name
+     * @param array $data
      * @return TimeOnlyType
      */
     public static function createFromArray($name, array $data = [])
diff --git a/tests/NamedParameters/ParameterTypesTest.php b/tests/NamedParameters/ParameterTypesTest.php
index 373bf3fe..a8ffa4b3 100644
--- a/tests/NamedParameters/ParameterTypesTest.php
+++ b/tests/NamedParameters/ParameterTypesTest.php
@@ -248,7 +248,9 @@ public function shouldValidateDate()
         $namedParameter->validate('Sun, 06 Nov 1994 08:49:37 BUNS');
     }
 
-    /** @test */
+    /**
+     * @test
+     */
     public function shouldValidateDateOnly()
     {
         $this->expectException('\Raml\Exception\ValidationException', 'Expected date-only');
@@ -256,7 +258,9 @@ public function shouldValidateDateOnly()
         $namedParameter->validate('2018-08-05T13:24:55');
     }
 
-    /** @test */
+    /**
+     * @test
+     */
     public function shouldValidateDateTimeOnly()
     {
         $this->expectException('\Raml\Exception\ValidationException', 'Expected datetime-only');
@@ -264,7 +268,9 @@ public function shouldValidateDateTimeOnly()
         $namedParameter->validate('2018-08-05T13:24:55+12:00');
     }
 
-    /** @test */
+    /**
+     * @test
+     */
     public function shouldValidateTimeOnly()
     {
         $this->expectException('\Raml\Exception\ValidationException', 'Expected time-only');
@@ -272,7 +278,9 @@ public function shouldValidateTimeOnly()
         $namedParameter->validate('2018-08-05T13:24:55');
     }
 
-    /** @test */
+    /**
+     * @test
+     */
     public function shouldValidateDateTime()
     {
         $this->expectException('\Raml\Exception\ValidationException', 'Expected datetime');
@@ -280,7 +288,9 @@ public function shouldValidateDateTime()
         $namedParameter->validate('2018-08-05 13:24:55');
     }
 
-    /** @test */
+    /**
+     * @test
+     */
     public function shouldValidateDateTimeFormat()
     {
         $this->expectException('\Raml\Exception\ValidationException', 'Expected datetime with format Y-m-d H:i:s');
@@ -290,8 +300,6 @@ public function shouldValidateDateTimeFormat()
 
     // ---
 
-    /** @test */
-
     /**
      * @test
      */