diff --git a/.travis.yml b/.travis.yml
index e53ebb7..54b1152 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ language: php
 php:
   - 5.6
   - 7.0
+  - 7.1
   - hhvm
 
 install:
diff --git a/tests/JoinerTest.php b/tests/JoinerTest.php
index f505ee8..9d50f6d 100644
--- a/tests/JoinerTest.php
+++ b/tests/JoinerTest.php
@@ -125,11 +125,6 @@ public function profiles()
         return $this->hasManyThrough($related, $through, 'user_id', 'company_id');
     }
 
-    public function getForeignKey()
-    {
-        return 'user_id';
-    }
-
     public function posts()
     {
         return $this->hasMany('Sofa\Eloquence\Tests\JoinerPostStub', 'user_id');
@@ -157,11 +152,6 @@ public function company()
 
 class JoinerCompanyStub extends Model {
     protected $table = 'companies';
-
-    public function getForeignKey()
-    {
-        return 'company_id';
-    }
 }
 
 class JoinerPostStub extends Model {