diff --git a/src/application/libraries/Unit_tests/Unit_tests.php b/src/application/libraries/Unit_tests/Unit_tests.php
index 7f5870d9..2f47d5d1 100644
--- a/src/application/libraries/Unit_tests/Unit_tests.php
+++ b/src/application/libraries/Unit_tests/Unit_tests.php
@@ -33,6 +33,8 @@ class Unit_tests extends CI_Driver_Library {
      * If a new group of tests is added, it should be also added in
      * this method, in order to be executed when all the tests need to 
      * be run.
+     * 
+     * @task In order to run the tests the user must be logged in as admin.
      */
     public function run_all_tests() {
         $this->run_model_tests(false);
diff --git a/src/application/models/customers_model.php b/src/application/models/customers_model.php
index c1072141..a6bb0858 100644
--- a/src/application/models/customers_model.php
+++ b/src/application/models/customers_model.php
@@ -28,8 +28,7 @@ class Customers_Model extends CI_Model {
         // :: CHECK IF CUSTOMER ALREADY EXIST (FROM EMAIL).	
         if ($this->exists($customer) && !isset($customer['id'])) {
         	// Find the customer id from the database.
-        	$customer['id'] = $this->get_batch(
-        			array('email' => $customer['email']))[0]['id'];
+        	$customer['id'] = $this->find_record_id($customer);
         }
 
         // :: INSERT OR UPDATE CUSTOMER RECORD
@@ -260,8 +259,9 @@ class Customers_Model extends CI_Model {
                     . 'exist in the database : ' . $field_name);
         }
         
-        return $this->db->get_where('ea_users', array('id' => $customer_id))
-                ->row_array()[$field_name];
+        $customer = $this->db->get_where('ea_users', array('id' => $customer_id))->row_array();
+        
+        return $customer[$field_name];
     }
     
     /**
diff --git a/src/application/models/providers_model.php b/src/application/models/providers_model.php
index 192703b3..69647d3f 100644
--- a/src/application/models/providers_model.php
+++ b/src/application/models/providers_model.php
@@ -53,8 +53,9 @@ class Providers_Model extends CI_Model {
                     . 'database : ' . $field_name);
         }
         
-        return $this->db->get_where('ea_users', array('id' => $provider_id))
-                ->row_array()[$field_name];
+        $provider = $this->db->get_where('ea_users', array('id' => $provider_id))->row_array();
+        
+        return $provider[$field_name];
     }
     
     /**
@@ -146,8 +147,9 @@ class Providers_Model extends CI_Model {
      * @return string Returs the value of the selected user setting.
      */
     public function get_setting($setting_name, $provider_id) {
-        return $this->db->get_where('ea_user_settings', array('id_users' => $provider_id))
-                ->row_array()[$setting_name];
+        $provider_settings = $this->db->get_where('ea_user_settings', 
+                array('id_users' => $provider_id))->row_array();
+        return $provider_settings[$setting_name];
     }
     
     /**
diff --git a/src/application/models/services_model.php b/src/application/models/services_model.php
index 39728d71..1cf9ab00 100644
--- a/src/application/models/services_model.php
+++ b/src/application/models/services_model.php
@@ -220,7 +220,8 @@ class Services_Model extends CI_Model {
             throw new Exception('The given $field_name argument does not exist in the database : ' . $field_name);
         }
         
-        return $this->db->get_where('ea_services', array('id' => $service_id))->row_array()[$field_name];
+        $setting = $this->db->get_where('ea_services', array('id' => $service_id))->row_array();
+        return $setting[$field_name];
     }
     
     /**