diff --git a/.travis.yml b/.travis.yml
index 0c7aa31..535c02c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,8 @@ php:
   - 5.6
   - 7.0
   - 7.1
-  
+  - 7.2
+
 addons:
   code_climate:
     repo_token: 653d80c9cb760f12e0ea14fc523f37cc07d95e69559913242810859ac65c1feb
diff --git a/tests/TotalsTest.php b/tests/TotalsTest.php
index 8cdd9ef..64b7bbb 100644
--- a/tests/TotalsTest.php
+++ b/tests/TotalsTest.php
@@ -241,6 +241,11 @@ public function testTaxTotalWithDiscounts()
         ]);
 
         $this->laracart->addCoupon($coupon);
+
+        $this->assertEquals(100, $this->laracart->subTotal(false));
+        $this->assertEquals(5, $this->laracart->totalDiscount(false));
+        $this->assertEquals(19.95, $this->laracart->taxTotal(false));
+        $this->assertEquals(114.95, $this->laracart->total(false));
     }
 
     public function testDoubleDiscounts()