diff --git a/tests/Utils/KeyCryptTest.php b/tests/Utils/KeyCryptTest.php
new file mode 100644
index 00000000..9720dbd3
--- /dev/null
+++ b/tests/Utils/KeyCryptTest.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace LeagueTests\Utils;
+
+use League\OAuth2\Server\Utils\KeyCrypt;
+
+class KeyCryptTest extends \PHPUnit_Framework_TestCase
+{
+    public function testEncryptDecrypt()
+    {
+        $payload = 'alex loves whisky';
+        $encrypted = KeyCrypt::encrypt($payload, 'file://'.__DIR__.'/private.key');
+        $plainText = KeyCrypt::decrypt($encrypted, 'file://'.__DIR__.'/public.key');
+
+        $this->assertNotEquals($payload, $encrypted);
+        $this->assertEquals($payload, $plainText);
+    }
+
+    /**
+     * @expectedException \LogicException
+     */
+    public function testBadPrivateKey()
+    {
+        KeyCrypt::encrypt('', 'file://'.__DIR__.'/public.key');
+    }
+
+    /**
+     * @expectedException \LogicException
+     */
+    public function testBadPublicKey()
+    {
+        KeyCrypt::decrypt('', 'file://'.__DIR__.'/private.key');
+    }
+}
diff --git a/tests/Utils/SecureKeyTest.php b/tests/Utils/SecureKeyTest.php
new file mode 100644
index 00000000..aebdb755
--- /dev/null
+++ b/tests/Utils/SecureKeyTest.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace LeagueTests\Utils;
+
+use League\OAuth2\Server\Utils\SecureKey;
+
+class SecureKeyTest extends \PHPUnit_Framework_TestCase
+{
+    public function testGenerate()
+    {
+        $this->assertTrue(is_string(SecureKey::generate()));
+    }
+}
diff --git a/tests/Utils/private.key b/tests/Utils/private.key
new file mode 100644
index 00000000..1d6a3bf6
--- /dev/null
+++ b/tests/Utils/private.key
@@ -0,0 +1,15 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/tests/Utils/public.key b/tests/Utils/public.key
new file mode 100644
index 00000000..25010108
--- /dev/null
+++ b/tests/Utils/public.key
@@ -0,0 +1,6 @@
+-----BEGIN PUBLIC KEY-----
+MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDOBcFjGUlo3BJ9zjwQLgAHn6Oy
+5Si0uB7MublTiPob8rWTiCE4weAFqzPoAB07vB0t0f8c1R8rmwHMD5ljWPBgJ8Fe
+wtwAUzprOBcau6DWukd/TKxXWeVLAl/NZxijI+jR5QDBYLNBtj1G4LBVHMmINd3r
+yCycbf9ac3rcC8zhrQIDAQAB
+-----END PUBLIC KEY-----