diff --git a/tests/unit/Tax/Helpers/TaxCest.php b/tests/unit/Tax/Helpers/TaxCest.php
index 443234d5d..2ed03a977 100644
--- a/tests/unit/Tax/Helpers/TaxCest.php
+++ b/tests/unit/Tax/Helpers/TaxCest.php
@@ -3,19 +3,22 @@
 namespace Tests\Unit\Tax\Helpers;
 
 use Cart;
+use Illuminate\Support\Facades\Config;
 use UnitTester;
+use Webkul\Tax\Models\TaxCategory;
 use Webkul\Tax\Models\TaxMap;
 use Webkul\Tax\Models\TaxRate;
-use Webkul\Tax\Models\TaxCategory;
-use Illuminate\Support\Facades\Config;
 
 class TaxCest
 {
     public $scenario;
 
     private const PRODUCT1_QTY = 11;
+
     private const PRODUCT2_QTY = 7;
 
+    private const TAX_RATE_PRECISION = 4;
+
     private const CART_TOTAL_PRECISION = 2;
 
     public function _before(UnitTester $I)
@@ -72,27 +75,26 @@ class TaxCest
             'quantity'   => self::PRODUCT2_QTY,
         ]);
 
-        // rounded by precision of 2 because this are sums of corresponding tax categories
+        // rounded by precision of 2 because these are sums of corresponding tax categories
         $expectedTaxAmount1 = round(
             round(self::PRODUCT1_QTY * $product1->price, self::CART_TOTAL_PRECISION)
-            * $tax1->tax_rate / 100,
+                * $tax1->tax_rate / 100,
             self::CART_TOTAL_PRECISION
         );
 
         $expectedTaxAmount2 = round(
             round(self::PRODUCT2_QTY * $product2->price, self::CART_TOTAL_PRECISION)
-            * $tax2->tax_rate / 100,
+                * $tax2->tax_rate / 100,
             self::CART_TOTAL_PRECISION
         );
 
         $this->scenario = [
             'cart'             => Cart::getCart(),
             'expectedTaxRates' => [
-                (string)round((float)$tax1->tax_rate, 4) => $expectedTaxAmount1,
-                (string)round((float)$tax2->tax_rate, 4) => $expectedTaxAmount2,
+                (string) round((float) $tax1->tax_rate, self::TAX_RATE_PRECISION) => $expectedTaxAmount1,
+                (string) round((float) $tax2->tax_rate, self::TAX_RATE_PRECISION) => $expectedTaxAmount2,
             ],
-            'expectedTaxTotal' =>
-                round($expectedTaxAmount1 + $expectedTaxAmount2, self::CART_TOTAL_PRECISION),
+            'expectedTaxTotal' => round($expectedTaxAmount1 + $expectedTaxAmount2, self::CART_TOTAL_PRECISION),
         ];
     }