diff --git a/.travis.yml b/.travis.yml
index cae2215..0f119ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,19 +8,15 @@ cache:
 env: MINIMUM_VERSIONS=false
 
 php:
+  - 5.6
+  - 7.0
   - 7.1
   - 7.2
   - 7.3
 
 
-matrix:
-  include:
-    - php: 7.1
-      env: MINIMUM_VERSIONS=true
-
 install:
-  - if [[ $MINIMUM_VERSIONS = false ]]; then composer install; fi
-  - if [[ $MINIMUM_VERSIONS = true ]]; then composer update --no-interaction --prefer-lowest; fi
+  - composer install --no-interaction
 
 script:
   - composer run test
diff --git a/test/src/Provider/WordPressComTest.php b/test/src/Provider/WordPressComTest.php
index f57f5d2..9166e6d 100755
--- a/test/src/Provider/WordPressComTest.php
+++ b/test/src/Provider/WordPressComTest.php
@@ -2,7 +2,9 @@
 namespace Layered\OAuth2\Client\Test\Provider;
 
 use Layered\OAuth2\Client\Provider\WordPressCom;
+use League\OAuth2\Client\Provider\ResourceOwnerInterface;
 use League\OAuth2\Client\Provider\Exception\IdentityProviderException;
+use League\OAuth2\Client\Token\AccessTokenInterface;
 use League\OAuth2\Client\Token\AccessToken;
 use PHPUnit\Framework\TestCase;
 use Mockery as m;
@@ -60,7 +62,7 @@ public function testGetAccessToken()
 
 		$token = $this->provider->getAccessToken('authorization_code', ['code' => 'mock_authorization_code']);
 
-		$this->assertInstanceOf('League\OAuth2\Client\Token\AccessTokenInterface', $token);
+		$this->assertInstanceOf(AccessTokenInterface::class, $token);
 		$this->assertEquals('mock_access_token', $token->getToken());
 		$this->assertNull($token->getExpires());
 		$this->assertNull($token->getRefreshToken());
@@ -98,7 +100,7 @@ public function testUserData()
 
 		$user = $this->provider->getResourceOwner($this->getMockToken());
 
-		$this->assertInstanceOf('League\OAuth2\Client\Provider\ResourceOwnerInterface', $user);
+		$this->assertInstanceOf(ResourceOwnerInterface::class, $user);
 		$this->assertEquals($mockUser['ID'], $user->getId());
 		$this->assertEquals($mockUser['username'], $user->getUsername());
 		$this->assertEquals($mockUser['email'], $user->getEmail());