diff --git a/tests/src/Codec/GuidStringCodecTest.php b/tests/src/Codec/GuidStringCodecTest.php
new file mode 100644
index 0000000..69df13e
--- /dev/null
+++ b/tests/src/Codec/GuidStringCodecTest.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace Ramsey\Uuid\Test\Codec;
+
+use Ramsey\Uuid\Test\TestCase;
+
+/**
+ * Class GuidStringCodecTest
+ * @package Ramsey\Uuid\Test\Codec
+ * @covers Ramsey\Uuid\Codec\GuidStringCodec
+ */
+class GuidStringCodecTest extends TestCase
+{
+
+    public function testEncodeUsesFieldsArray()
+    {
+        
+    }
+
+    public function testEncodeReturnsFormattedString()
+    {
+
+    }
+
+    public function testEncodeBinaryUsesFieldsArray()
+    {
+
+    }
+
+    public function testEncodeBinaryReturnsBinaryString()
+    {
+
+    }
+
+    public function testDecodeUsesBuilderOnFields()
+    {
+
+    }
+
+    public function testDecodeReturnsUuidFromBuilder()
+    {
+
+    }
+
+    public function testDecodeBytesReturnsUuid()
+    {
+
+    }
+}
diff --git a/tests/src/Codec/StringCodecTest.php b/tests/src/Codec/StringCodecTest.php
index 342c7ae..5812fee 100644
--- a/tests/src/Codec/StringCodecTest.php
+++ b/tests/src/Codec/StringCodecTest.php
@@ -81,7 +81,7 @@ class StringCodecTest extends TestCase
         $this->assertEquals($expected, $result);
     }
 
-    public function testDecodeUsesBulderOnFields()
+    public function testDecodeUsesBuilderOnFields()
     {
         $string = 'uuid:12345678-1234-abcd-abef-1234abcd4321';
         $this->builder->expects($this->once())