diff --git a/Models/AccountType.php b/Models/AccountType.php
index b2a8fc6..08ea8df 100644
--- a/Models/AccountType.php
+++ b/Models/AccountType.php
@@ -27,7 +27,10 @@ use phpOMS\Stdlib\Base\Enum;
 abstract class AccountType extends Enum
 {
     public const IMPERSONAL = 0;
+
     public const PERSONAL   = 1;
+
     public const CREDITOR   = 2;
+
     public const DEBITOR    = 4;
 }
diff --git a/Models/L11nCostCenter.php b/Models/L11nCostCenter.php
index 9d11417..e336a8e 100644
--- a/Models/L11nCostCenter.php
+++ b/Models/L11nCostCenter.php
@@ -25,7 +25,7 @@ use phpOMS\Localization\ISO639x1Enum;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class L11nCostCenter implements ArrayableInterface, \JsonSerializable
+class L11nCostCenter implements \JsonSerializable, ArrayableInterface
 {
     /**
      * Article ID.
diff --git a/Models/L11nCostObject.php b/Models/L11nCostObject.php
index e13cd10..193575b 100644
--- a/Models/L11nCostObject.php
+++ b/Models/L11nCostObject.php
@@ -25,7 +25,7 @@ use phpOMS\Localization\ISO639x1Enum;
  * @link    https://orange-management.org
  * @since   1.0.0
  */
-class L11nCostObject implements ArrayableInterface, \JsonSerializable
+class L11nCostObject implements \JsonSerializable, ArrayableInterface
 {
     /**
      * Article ID.
diff --git a/Models/PermissionState.php b/Models/PermissionState.php
index 81f60ff..583d7da 100644
--- a/Models/PermissionState.php
+++ b/Models/PermissionState.php
@@ -27,12 +27,20 @@ use phpOMS\Stdlib\Base\Enum;
 abstract class PermissionState extends Enum
 {
     public const PERSONAL    = 1;
+
     public const IMPERSONAL  = 2;
+
     public const JOURNAL     = 3;
+
     public const STACK       = 4;
+
     public const GL          = 5;
+
     public const COST_CENTER = 6;
+
     public const COST_OBJECT = 7;
+
     public const ACCOUNT     = 8;
+
     public const ENTRY       = 9;
 }
diff --git a/Models/TimeRangeType.php b/Models/TimeRangeType.php
index 665a1b8..84ea9f0 100644
--- a/Models/TimeRangeType.php
+++ b/Models/TimeRangeType.php
@@ -27,7 +27,10 @@ use phpOMS\Stdlib\Base\Enum;
 abstract class TimeRangeType extends Enum
 {
     public const ENTRY_DATE      = 0; /* Date of when the entry happened */
+
     public const DUE_DATE        = 1; /* Date of when the entry is due (only for invoices) */
+
     public const RECEIPT_DATE    = 2; /* Date of the receipt */
+
     public const ASSOCIATED_DATE = 3; /* Date of the association (e.g. when did the articles arrive) */
 }
diff --git a/Theme/Backend/account-list.tpl.php b/Theme/Backend/account-list.tpl.php
index bcff661..6d8ab87 100644
--- a/Theme/Backend/account-list.tpl.php
+++ b/Theme/Backend/account-list.tpl.php
@@ -1,11 +1,11 @@
 <template id="entry-list-tpl">
     <div id="entry-list" class="box" style="z-index: 99; position: relative; top: 20px; display: block; margin: 0 auto; width: 20%;">
         <table class="default">
-            <caption><?= $this->getHtml('Accounts') ?><i class="fa fa-download floatRight download btn"></i></caption>
+            <caption><?= $this->getHtml('Accounts'); ?><i class="fa fa-download floatRight download btn"></i></caption>
             <thead>
             <tr>
                 <td><?= $this->getHtml('ID', '0', '0'); ?>
-                <td class="wf-100"><?= $this->getHtml('Account') ?>
+                <td class="wf-100"><?= $this->getHtml('Account'); ?>
             <tbody>
         </table>
     </div>
diff --git a/Theme/Backend/costcenter-list.tpl.php b/Theme/Backend/costcenter-list.tpl.php
index fd6c8cd..07e56b7 100644
--- a/Theme/Backend/costcenter-list.tpl.php
+++ b/Theme/Backend/costcenter-list.tpl.php
@@ -27,18 +27,18 @@ echo $this->getData('nav')->render(); ?>
 <div class="row">
     <div class="col-xs-12">
         <div class="portlet">
-            <div class="portlet-head"><?= $this->getHtml('CostCenters') ?><i class="fa fa-download floatRight download btn"></i></div>
+            <div class="portlet-head"><?= $this->getHtml('CostCenters'); ?><i class="fa fa-download floatRight download btn"></i></div>
             <table class="default">
             <thead>
             <tr>
-                <td><?= $this->getHtml('Code') ?>
-                <td class="wf-100"><?= $this->getHtml('Name') ?>
+                <td><?= $this->getHtml('Code'); ?>
+                <td class="wf-100"><?= $this->getHtml('Name'); ?>
             <tbody>
             <?php $count = 0; foreach ($costcenter as $key => $value) : ++$count;
             $url = UriFactory::build('{/prefix}tag/single?{?}&id=' . $value->getId()); ?>
                 <tr tabindex="0" data-href="<?= $url; ?>">
-                    <td data-label="<?= $this->getHtml('Code') ?>"><a href="<?= $url; ?>"><?= $this->printHtml($value->getCode()); ?></a>
-                    <td data-label="<?= $this->getHtml('Name') ?>"><a href="<?= $url; ?>"><?= $this->printHtml($value->getName()); ?></a>
+                    <td data-label="<?= $this->getHtml('Code'); ?>"><a href="<?= $url; ?>"><?= $this->printHtml($value->getCode()); ?></a>
+                    <td data-label="<?= $this->getHtml('Name'); ?>"><a href="<?= $url; ?>"><?= $this->printHtml($value->getName()); ?></a>
             <?php endforeach; ?>
             <?php if ($count === 0) : ?>
                 <tr><td colspan="3" class="empty"><?= $this->getHtml('Empty', '0', '0'); ?>
diff --git a/Theme/Backend/costobject-list.tpl.php b/Theme/Backend/costobject-list.tpl.php
index 321a865..3a76ecf 100644
--- a/Theme/Backend/costobject-list.tpl.php
+++ b/Theme/Backend/costobject-list.tpl.php
@@ -27,18 +27,18 @@ echo $this->getData('nav')->render(); ?>
 <div class="row">
     <div class="col-xs-12">
         <div class="portlet">
-            <div class="portlet-head"><?= $this->getHtml('CostObjects') ?><i class="fa fa-download floatRight download btn"></i></div>
+            <div class="portlet-head"><?= $this->getHtml('CostObjects'); ?><i class="fa fa-download floatRight download btn"></i></div>
             <table class="default">
             <thead>
             <tr>
-                <td><?= $this->getHtml('Code') ?>
-                <td class="wf-100"><?= $this->getHtml('Name') ?>
+                <td><?= $this->getHtml('Code'); ?>
+                <td class="wf-100"><?= $this->getHtml('Name'); ?>
             <tbody>
             <?php $count = 0; foreach ($costobject as $key => $value) : ++$count;
             $url = UriFactory::build('{/prefix}tag/single?{?}&id=' . $value->getId()); ?>
                 <tr tabindex="0" data-href="<?= $url; ?>">
-                    <td data-label="<?= $this->getHtml('Code') ?>"><a href="<?= $url; ?>"><?= $this->printHtml($value->getCode()); ?></a>
-                    <td data-label="<?= $this->getHtml('Name') ?>"><a href="<?= $url; ?>"><?= $this->printHtml($value->getName()); ?></a>
+                    <td data-label="<?= $this->getHtml('Code'); ?>"><a href="<?= $url; ?>"><?= $this->printHtml($value->getCode()); ?></a>
+                    <td data-label="<?= $this->getHtml('Name'); ?>"><a href="<?= $url; ?>"><?= $this->printHtml($value->getName()); ?></a>
             <?php endforeach; ?>
             <?php if ($count === 0) : ?>
                 <tr><td colspan="3" class="empty"><?= $this->getHtml('Empty', '0', '0'); ?>
diff --git a/Theme/Backend/entries.tpl.php b/Theme/Backend/entries.tpl.php
index f6bbc1e..06822fa 100644
--- a/Theme/Backend/entries.tpl.php
+++ b/Theme/Backend/entries.tpl.php
@@ -29,10 +29,10 @@ $footerView->setResults(1);
                 <form>
                     <table class="layout wf-100">
                         <tr>
-                            <td><label for="iAccountStart"><?= $this->getHtml('Account') ?></label>
-                            <td><label for="iAccountStart"><?= $this->getHtml('CostCenter') ?>
-                            <td><label for="iAccountStart"><?= $this->getHtml('CostObject') ?>
-                            <td><label for="iAccountStart"><?= $this->getHtml('EntryDate') ?>
+                            <td><label for="iAccountStart"><?= $this->getHtml('Account'); ?></label>
+                            <td><label for="iAccountStart"><?= $this->getHtml('CostCenter'); ?>
+                            <td><label for="iAccountStart"><?= $this->getHtml('CostObject'); ?>
+                            <td><label for="iAccountStart"><?= $this->getHtml('EntryDate'); ?>
                         <tr>
                             <td><span class="input"><button type="button" id="account-start" formaction="" data-action='[{"type": "popup", "tpl": "entry-list-tpl", "aniIn": "fadeIn", "aniOut": "fadeOut", "stay": 1000}]'><i class="fa fa-book"></i>
                                     </button><input type="number" id="iId" min="1" name="id" required></span>
@@ -42,10 +42,10 @@ $footerView->setResults(1);
                                     </button><input type="number" id="iId" min="1" name="id" required></span>
                             <td><input type="datetime-local" id="iId" min="1" name="id" required>
                         <tr>
-                            <td><label for="iAccountStart"><?= $this->getHtml('To') ?></label>
-                            <td><label for="iAccountStart"><?= $this->getHtml('To') ?>
-                            <td><label for="iAccountStart"><?= $this->getHtml('To') ?>
-                            <td><label for="iAccountStart"><?= $this->getHtml('To') ?>
+                            <td><label for="iAccountStart"><?= $this->getHtml('To'); ?></label>
+                            <td><label for="iAccountStart"><?= $this->getHtml('To'); ?>
+                            <td><label for="iAccountStart"><?= $this->getHtml('To'); ?>
+                            <td><label for="iAccountStart"><?= $this->getHtml('To'); ?>
                         <tr>
                             <td><span class="input"><button type="button" formaction=""><i class="fa fa-book"></i>
                                     </button><input type="number" id="iId" min="1" name="id" required></span>
@@ -66,9 +66,9 @@ $footerView->setResults(1);
 <div class="box w-100">
     <div class="tabview tab-2">
         <ul class="tab-links">
-            <li><label for="c-tab2-1"><?= $this->getHtml('List') ?></label></li>
-            <li><label for="c-tab2-2"><?= $this->getHtml('Evaluation') ?></label></li>
-            <li><label for="c-tab2-3"><?= $this->getHtml('Charts') ?></label></li>
+            <li><label for="c-tab2-1"><?= $this->getHtml('List'); ?></label></li>
+            <li><label for="c-tab2-2"><?= $this->getHtml('Evaluation'); ?></label></li>
+            <li><label for="c-tab2-3"><?= $this->getHtml('Charts'); ?></label></li>
         </ul>
         <div class="tab-content">
             <input type="radio" id="c-tab2-1" name="tabular-2" checked>
@@ -80,19 +80,19 @@ $footerView->setResults(1);
                                 <caption><?= $this->getHtml('Entries'); ?><i class="fa fa-download floatRight download btn"></i></caption>
                                 <thead>
                                 <tr>
-                                    <td><?= $this->getHtml('EntryDate') ?>
-                                    <td><?= $this->getHtml('Receipt') ?>
-                                    <td><?= $this->getHtml('Debit') ?>
-                                    <td><?= $this->getHtml('Credit') ?>
-                                    <td class="wf-100"><?= $this->getHtml('Text') ?>
-                                    <td><?= $this->getHtml('Account') ?>
-                                    <td><?= $this->getHtml('ContraAccount') ?>
-                                    <td><?= $this->getHtml('CostCenter') ?>
-                                    <td><?= $this->getHtml('CostObject') ?>
-                                    <td><?= $this->getHtml('ReceiptDate') ?>
-                                    <td><?= $this->getHtml('ExternalVoucher') ?>
-                                    <td><?= $this->getHtml('Creator') ?>
-                                    <td><?= $this->getHtml('Created') ?>
+                                    <td><?= $this->getHtml('EntryDate'); ?>
+                                    <td><?= $this->getHtml('Receipt'); ?>
+                                    <td><?= $this->getHtml('Debit'); ?>
+                                    <td><?= $this->getHtml('Credit'); ?>
+                                    <td class="wf-100"><?= $this->getHtml('Text'); ?>
+                                    <td><?= $this->getHtml('Account'); ?>
+                                    <td><?= $this->getHtml('ContraAccount'); ?>
+                                    <td><?= $this->getHtml('CostCenter'); ?>
+                                    <td><?= $this->getHtml('CostObject'); ?>
+                                    <td><?= $this->getHtml('ReceiptDate'); ?>
+                                    <td><?= $this->getHtml('ExternalVoucher'); ?>
+                                    <td><?= $this->getHtml('Creator'); ?>
+                                    <td><?= $this->getHtml('Created'); ?>
                                 <tfoot>
                                 <tr>
                                     <td colspan="13">
@@ -118,9 +118,9 @@ $footerView->setResults(1);
                                 <caption><?= $this->getHtml('Accounts'); ?><i class="fa fa-download floatRight download btn"></i></caption>
                                 <thead>
                                 <tr>
-                                    <td><?= $this->getHtml('Account') ?>
-                                    <td class="wf-100"><?= $this->getHtml('Name') ?>
-                                    <td><?= $this->getHtml('Total') ?>
+                                    <td><?= $this->getHtml('Account'); ?>
+                                    <td class="wf-100"><?= $this->getHtml('Name'); ?>
+                                    <td><?= $this->getHtml('Total'); ?>
                                 <tbody>
                                 <?php $count = 0;
                                 foreach ([] as $key => $value) : ++$count; ?>
@@ -138,9 +138,9 @@ $footerView->setResults(1);
                                 <caption><?= $this->getHtml('CostCenter'); ?><i class="fa fa-download floatRight download btn"></i></caption>
                                 <thead>
                                 <tr>
-                                    <td><?= $this->getHtml('CostCenter') ?>
-                                    <td class="wf-100"><?= $this->getHtml('Name') ?>
-                                    <td><?= $this->getHtml('Total') ?>
+                                    <td><?= $this->getHtml('CostCenter'); ?>
+                                    <td class="wf-100"><?= $this->getHtml('Name'); ?>
+                                    <td><?= $this->getHtml('Total'); ?>
                                 <tbody>
                                 <?php $count = 0;
                                 foreach ([] as $key => $value) : ++$count; ?>
@@ -158,9 +158,9 @@ $footerView->setResults(1);
                                 <caption><?= $this->getHtml('CostObject'); ?><i class="fa fa-download floatRight download btn"></i></caption>
                                 <thead>
                                 <tr>
-                                    <td><?= $this->getHtml('Account') ?>
-                                    <td class="wf-100"><?= $this->getHtml('Name') ?>
-                                    <td><?= $this->getHtml('Total') ?>
+                                    <td><?= $this->getHtml('Account'); ?>
+                                    <td class="wf-100"><?= $this->getHtml('Name'); ?>
+                                    <td><?= $this->getHtml('Total'); ?>
                                 <tbody>
                                 <?php $count = 0;
                                 foreach ([] as $key => $value) : ++$count; ?>
diff --git a/Theme/Backend/gl-create.tpl.php b/Theme/Backend/gl-create.tpl.php
index ac5b964..2935f10 100644
--- a/Theme/Backend/gl-create.tpl.php
+++ b/Theme/Backend/gl-create.tpl.php
@@ -15,15 +15,15 @@ declare(strict_types=1);
 echo $this->getData('nav')->render(); ?>
 
 <section class="box w-50">
-    <header><h1><?= $this->getHtml('GL') ?></h1></header>
+    <header><h1><?= $this->getHtml('GL'); ?></h1></header>
     <div class="inner">
         <form>
             <table class="layout wf-100">
                 <tr><td><label for="iId"><?= $this->getHtml('ID', '0', '0'); ?></label>
                 <tr><td><input type="text" id="iId" name="id">
-                <tr><td><label for="iName"><?= $this->getHtml('Name') ?></label>
+                <tr><td><label for="iName"><?= $this->getHtml('Name'); ?></label>
                 <tr><td><input type="text" id="iName" name="name">
-                <tr><td><label for="iParent"><?= $this->getHtml('Parent') ?></label>
+                <tr><td><label for="iParent"><?= $this->getHtml('Parent'); ?></label>
                 <tr><td><input type="text" id="iParent" name="parent">
                 <tr><td><input type="submit" value="<?= $this->getHtml('Create', '0', '0'); ?>">
             </table>
diff --git a/Theme/Backend/gl-list.tpl.php b/Theme/Backend/gl-list.tpl.php
index a59a005..92ee883 100644
--- a/Theme/Backend/gl-list.tpl.php
+++ b/Theme/Backend/gl-list.tpl.php
@@ -29,11 +29,11 @@ echo $this->getData('nav')->render(); ?>
     <div class="col-xs-12">
         <div class="box wf-100">
             <table class="default">
-                <caption><?= $this->getHtml('GL') ?><i class="fa fa-download floatRight download btn"></i></caption>
+                <caption><?= $this->getHtml('GL'); ?><i class="fa fa-download floatRight download btn"></i></caption>
                 <thead>
                 <tr>
                     <td><?= $this->getHtml('ID', '0', '0'); ?>
-                    <td class="wf-100"><?= $this->getHtml('Name') ?>
+                    <td class="wf-100"><?= $this->getHtml('Name'); ?>
                 <tfoot>
                 <tr><td colspan="5">
                 <tbody>
diff --git a/Theme/Backend/journal-list.tpl.php b/Theme/Backend/journal-list.tpl.php
index 00950f0..892aec9 100644
--- a/Theme/Backend/journal-list.tpl.php
+++ b/Theme/Backend/journal-list.tpl.php
@@ -27,11 +27,11 @@ echo $this->getData('nav')->render(); ?>
 
 <div class="box w-100">
     <table class="default">
-        <caption><?= $this->getHtml('Journal') ?><i class="fa fa-download floatRight download btn"></i></caption>
+        <caption><?= $this->getHtml('Journal'); ?><i class="fa fa-download floatRight download btn"></i></caption>
         <thead>
         <tr>
             <td><?= $this->getHtml('ID', '0', '0'); ?>
-            <td class="wf-100"><?= $this->getHtml('Name') ?>
+            <td class="wf-100"><?= $this->getHtml('Name'); ?>
         <tfoot>
         <tr><td colspan="5">
         <tbody>
diff --git a/Theme/Backend/stack-archive-list.tpl.php b/Theme/Backend/stack-archive-list.tpl.php
index ecc6643..6cf72c5 100644
--- a/Theme/Backend/stack-archive-list.tpl.php
+++ b/Theme/Backend/stack-archive-list.tpl.php
@@ -27,13 +27,13 @@ echo $this->getData('nav')->render(); ?>
 
 <div class="box w-100">
     <table class="default">
-        <caption><?= $this->getHtml('BatchPostings') ?><i class="fa fa-download floatRight download btn"></i></caption>
+        <caption><?= $this->getHtml('BatchPostings'); ?><i class="fa fa-download floatRight download btn"></i></caption>
         <thead>
         <tr>
             <td><?= $this->getHtml('ID', '0', '0'); ?>
-            <td class="wf-100"><?= $this->getHtml('Name') ?>
-            <td><?= $this->getHtml('Creator') ?>
-            <td><?= $this->getHtml('Created') ?>
+            <td class="wf-100"><?= $this->getHtml('Name'); ?>
+            <td><?= $this->getHtml('Creator'); ?>
+            <td><?= $this->getHtml('Created'); ?>
         <tfoot>
         <tr><td colspan="5">
         <tbody>
diff --git a/Theme/Backend/stack-create.tpl.php b/Theme/Backend/stack-create.tpl.php
index 8f78362..11134d8 100644
--- a/Theme/Backend/stack-create.tpl.php
+++ b/Theme/Backend/stack-create.tpl.php
@@ -18,17 +18,17 @@ declare(strict_types=1);
 echo $this->getData('nav')->render(); ?>
 
 <section class="box w-50">
-    <header><h1><?= $this->getHtml('Stack') ?></h1></header>
+    <header><h1><?= $this->getHtml('Stack'); ?></h1></header>
     <div class="inner">
         <form>
             <table class="layout wf-100">
-                <tr><td><label for="iName"><?= $this->getHtml('Name') ?></label>
+                <tr><td><label for="iName"><?= $this->getHtml('Name'); ?></label>
                 <tr><td><input id="iName" name="name" type="text">
-                <tr><td><label for="iType"><?= $this->getHtml('Type') ?></label>
+                <tr><td><label for="iType"><?= $this->getHtml('Type'); ?></label>
                 <tr><td><select id="iType" name="type">
-                            <option value=""><?= $this->getHtml('TAccount') ?>
-                            <option value=""><?= $this->getHtml('Incoming') ?>
-                            <option value=""><?= $this->getHtml('Outgoing') ?>
+                            <option value=""><?= $this->getHtml('TAccount'); ?>
+                            <option value=""><?= $this->getHtml('Incoming'); ?>
+                            <option value=""><?= $this->getHtml('Outgoing'); ?>
                         </select>
                 <tr><td><input name="submit" type="submit" value="<?= $this->getHtml('Create', '0', '0'); ?>">
             </table>
diff --git a/Theme/Backend/stack-list.tpl.php b/Theme/Backend/stack-list.tpl.php
index 7ae7d94..1dd473e 100644
--- a/Theme/Backend/stack-list.tpl.php
+++ b/Theme/Backend/stack-list.tpl.php
@@ -29,13 +29,13 @@ echo $this->getData('nav')->render(); ?>
     <div class="col-xs-12">
         <div class="box wf-100">
             <table class="default">
-                <caption><?= $this->getHtml('BatchPostings') ?><i class="fa fa-download floatRight download btn"></i></caption>
+                <caption><?= $this->getHtml('BatchPostings'); ?><i class="fa fa-download floatRight download btn"></i></caption>
                 <thead>
                 <tr>
                     <td><?= $this->getHtml('ID', '0', '0'); ?>
-                    <td class="wf-100"><?= $this->getHtml('Name') ?>
-                    <td><?= $this->getHtml('Creator') ?>
-                    <td><?= $this->getHtml('Created') ?>
+                    <td class="wf-100"><?= $this->getHtml('Name'); ?>
+                    <td><?= $this->getHtml('Creator'); ?>
+                    <td><?= $this->getHtml('Created'); ?>
                 <tfoot>
                 <tr><td colspan="5">
                 <tbody>
diff --git a/Theme/Backend/stack-predefined-list.tpl.php b/Theme/Backend/stack-predefined-list.tpl.php
index 4fe0ad7..a25a69d 100644
--- a/Theme/Backend/stack-predefined-list.tpl.php
+++ b/Theme/Backend/stack-predefined-list.tpl.php
@@ -27,14 +27,14 @@ echo $this->getData('nav')->render(); ?>
 
 <div class="box w-100">
     <table class="default">
-        <caption><?= $this->getHtml('BatchPostings') ?><i class="fa fa-download floatRight download btn"></i></caption>
+        <caption><?= $this->getHtml('BatchPostings'); ?><i class="fa fa-download floatRight download btn"></i></caption>
         <thead>
         <tr>
             <td><?= $this->getHtml('ID', '0', '0'); ?>
-            <td><?= $this->getHtml('Due') ?>
-            <td class="wf-100"><?= $this->getHtml('Name') ?>
-            <td><?= $this->getHtml('Creator') ?>
-            <td><?= $this->getHtml('Created') ?>
+            <td><?= $this->getHtml('Due'); ?>
+            <td class="wf-100"><?= $this->getHtml('Name'); ?>
+            <td><?= $this->getHtml('Creator'); ?>
+            <td><?= $this->getHtml('Created'); ?>
         <tfoot>
         <tr><td colspan="5">
         <tbody>
diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
index 2d57366..3e8a6a5 100644
--- a/tests/Admin/AdminTest.php
+++ b/tests/Admin/AdminTest.php
@@ -20,6 +20,7 @@ namespace Modules\Accounting\tests\Admin;
 class AccountingTest extends \PHPUnit\Framework\TestCase
 {
     protected const MODULE_NAME = 'Accounting';
+
     protected const URI_LOAD = 'http://127.0.0.1/en/backend/accounting';
 
     use \Modules\tests\ModuleTestTrait;
diff --git a/tests/Models/CostCenterTest.php b/tests/Models/CostCenterTest.php
index 5db274c..cbe374e 100644
--- a/tests/Models/CostCenterTest.php
+++ b/tests/Models/CostCenterTest.php
@@ -29,7 +29,7 @@ class CostCenterTest extends \PHPUnit\Framework\TestCase
         self::assertEquals('', $cc->getName());
         self::assertEquals('', $cc->getCode());
         self::assertEquals('', $cc->getDescription());
-        self::assertEquals(null, $cc->getParent());
+        self::assertNull($cc->getParent());
     }
 
     public function testNameInputOutput() : void
diff --git a/tests/Models/CostObjectTest.php b/tests/Models/CostObjectTest.php
index 10e3af6..3e0ac95 100644
--- a/tests/Models/CostObjectTest.php
+++ b/tests/Models/CostObjectTest.php
@@ -29,7 +29,7 @@ class CostObjectTest extends \PHPUnit\Framework\TestCase
         self::assertEquals('', $co->getName());
         self::assertEquals('', $co->getCode());
         self::assertEquals('', $co->getDescription());
-        self::assertEquals(null, $co->getParent());
+        self::assertNull($co->getParent());
     }
 
     public function testNameInputOutput() : void