diff --git a/.phpstan.dist.baseline.neon b/.phpstan.dist.baseline.neon
index 8d87f7835ba..b0a545190ae 100644
--- a/.phpstan.dist.baseline.neon
+++ b/.phpstan.dist.baseline.neon
@@ -5206,7 +5206,7 @@ parameters:
 			message: '#^Comparison operation "\!\=" between array\|int and 0 results in an error\.$#'
 			identifier: notEqual.invalid
 			count: 1
-			path: app/code/core/Mage/Reports/Model/Resource/Report/Product/Viewed/Collection.php
+			path: app/code/core/Mage/Reports/Model/Resource/Report/Collection/Abstract.php
 
 		-
 			message: '#^Parameter \#1 \$select of method Mage_Core_Model_Resource_Helper_Mysql4\:\:getQueryUsingAnalyticFunction\(\) expects Varien_Db_Select, Zend_Db_Select given\.$#'
@@ -5814,12 +5814,6 @@ parameters:
 			count: 1
 			path: app/code/core/Mage/Sales/Model/Resource/Order/Tax/Collection.php
 
-		-
-			message: '#^Comparison operation "\!\=" between array\|int and 0 results in an error\.$#'
-			identifier: notEqual.invalid
-			count: 1
-			path: app/code/core/Mage/Sales/Model/Resource/Report/Bestsellers/Collection.php
-
 		-
 			message: '#^Parameter \#1 \$select of method Mage_Core_Model_Resource_Helper_Mysql4\:\:getQueryUsingAnalyticFunction\(\) expects Varien_Db_Select, Zend_Db_Select given\.$#'
 			identifier: argument.type
diff --git a/app/Mage.php b/app/Mage.php
index a307d5cb50b..96b868ad890 100644
--- a/app/Mage.php
+++ b/app/Mage.php
@@ -14,8 +14,9 @@
  * @license    https://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
  */
 
-define('DS', DIRECTORY_SEPARATOR);
-define('PS', PATH_SEPARATOR);
+defined('DS') || define('DS', DIRECTORY_SEPARATOR);
+defined('PS') || define('PS', PATH_SEPARATOR);
+
 define('BP', dirname(__DIR__));
 
 Mage::register('original_include_path', get_include_path());
@@ -278,7 +279,7 @@ public static function register($key, $value, $graceful = false)
             if ($graceful) {
                 return;
             }
-            self::throwException('Mage registry key "' . $key . '" already exists');
+            self::throwException("Mage registry key $key already exists");
         }
         self::$_registry[$key] = $value;
     }
@@ -331,7 +332,7 @@ public static function setRoot($appRoot = '')
         if (is_dir($appRoot) && is_readable($appRoot)) {
             self::$_appRoot = $appRoot;
         } else {
-            self::throwException($appRoot . ' is not a directory or not readable by this user');
+            self::throwException("$appRoot is not a directory or not readable by this user");
         }
     }
 
diff --git a/app/code/core/Mage/Reports/Model/Resource/Report/Collection/Abstract.php b/app/code/core/Mage/Reports/Model/Resource/Report/Collection/Abstract.php
index b502f0a6e38..7dde4c75d05 100644
--- a/app/code/core/Mage/Reports/Model/Resource/Report/Collection/Abstract.php
+++ b/app/code/core/Mage/Reports/Model/Resource/Report/Collection/Abstract.php
@@ -268,4 +268,48 @@ public function load($printQuery = false, $logQuery = false)
         }
         return parent::load($printQuery, $logQuery);
     }
+
+
+    /**
+     * Get SQL for get record count
+     *
+     * @return Varien_Db_Select
+     * @see Mage_Reports_Model_Resource_Report_Product_Viewed_Collection
+     * @see Mage_Sales_Model_Resource_Report_Bestsellers_Collection
+     */
+    public function getSelectCountSql()
+    {
+        $this->_renderFilters();
+        $select = clone $this->getSelect();
+        $select->reset(Zend_Db_Select::ORDER);
+        return $this->getConnection()->select()->from($select, 'COUNT(*)');
+    }
+
+    /**
+     * Set ids for store restrictions
+     *
+     * @param  array $storeIds
+     * @return $this
+     * @see Mage_Reports_Model_Resource_Report_Product_Viewed_Collection
+     * @see Mage_Sales_Model_Resource_Report_Bestsellers_Collection
+     */
+    public function addStoreRestrictions($storeIds)
+    {
+        if (!is_array($storeIds)) {
+            $storeIds = [$storeIds];
+        }
+        $currentStoreIds = $this->_storesIds;
+        if (isset($currentStoreIds) && $currentStoreIds != Mage_Core_Model_App::ADMIN_STORE_ID
+            && $currentStoreIds != [Mage_Core_Model_App::ADMIN_STORE_ID]
+        ) {
+            if (!is_array($currentStoreIds)) {
+                $currentStoreIds = [$currentStoreIds];
+            }
+            $this->_storesIds = array_intersect($currentStoreIds, $storeIds);
+        } else {
+            $this->_storesIds = $storeIds;
+        }
+
+        return $this;
+    }
 }
diff --git a/app/code/core/Mage/Reports/Model/Resource/Report/Product/Viewed/Collection.php b/app/code/core/Mage/Reports/Model/Resource/Report/Product/Viewed/Collection.php
index dbe8d77391d..30ae025b2be 100644
--- a/app/code/core/Mage/Reports/Model/Resource/Report/Product/Viewed/Collection.php
+++ b/app/code/core/Mage/Reports/Model/Resource/Report/Product/Viewed/Collection.php
@@ -157,45 +157,6 @@ protected function _initSelect()
         return $this;
     }
 
-    /**
-     * Get SQL for get record count
-     *
-     * @return Varien_Db_Select
-     */
-    public function getSelectCountSql()
-    {
-        $this->_renderFilters();
-        $select = clone $this->getSelect();
-        $select->reset(Zend_Db_Select::ORDER);
-        return $this->getConnection()->select()->from($select, 'COUNT(*)');
-    }
-
-    /**
-     * Set ids for store restrictions
-     *
-     * @param  array $storeIds
-     * @return $this
-     */
-    public function addStoreRestrictions($storeIds)
-    {
-        if (!is_array($storeIds)) {
-            $storeIds = [$storeIds];
-        }
-        $currentStoreIds = $this->_storesIds;
-        if (isset($currentStoreIds) && $currentStoreIds != Mage_Core_Model_App::ADMIN_STORE_ID
-            && $currentStoreIds != [Mage_Core_Model_App::ADMIN_STORE_ID]
-        ) {
-            if (!is_array($currentStoreIds)) {
-                $currentStoreIds = [$currentStoreIds];
-            }
-            $this->_storesIds = array_intersect($currentStoreIds, $storeIds);
-        } else {
-            $this->_storesIds = $storeIds;
-        }
-
-        return $this;
-    }
-
     /**
      * Redeclare parent method for applying filters after parent method
      * but before adding unions and calculating totals
diff --git a/app/code/core/Mage/Sales/Model/Resource/Report/Bestsellers/Collection.php b/app/code/core/Mage/Sales/Model/Resource/Report/Bestsellers/Collection.php
index f2bd3a13db3..40bbec8a379 100644
--- a/app/code/core/Mage/Sales/Model/Resource/Report/Bestsellers/Collection.php
+++ b/app/code/core/Mage/Sales/Model/Resource/Report/Bestsellers/Collection.php
@@ -158,45 +158,6 @@ protected function _initSelect()
         return $this;
     }
 
-    /**
-     * Get SQL for get record count
-     *
-     * @return Varien_Db_Select
-     */
-    public function getSelectCountSql()
-    {
-        $this->_renderFilters();
-        $select = clone $this->getSelect();
-        $select->reset(Zend_Db_Select::ORDER);
-        return $this->getConnection()->select()->from($select, 'COUNT(*)');
-    }
-
-    /**
-     * Set ids for store restrictions
-     *
-     * @param  array $storeIds
-     * @return $this
-     */
-    public function addStoreRestrictions($storeIds)
-    {
-        if (!is_array($storeIds)) {
-            $storeIds = [$storeIds];
-        }
-        $currentStoreIds = $this->_storesIds;
-        if (isset($currentStoreIds) && $currentStoreIds != Mage_Core_Model_App::ADMIN_STORE_ID
-            && $currentStoreIds != [Mage_Core_Model_App::ADMIN_STORE_ID]
-        ) {
-            if (!is_array($currentStoreIds)) {
-                $currentStoreIds = [$currentStoreIds];
-            }
-            $this->_storesIds = array_intersect($currentStoreIds, $storeIds);
-        } else {
-            $this->_storesIds = $storeIds;
-        }
-
-        return $this;
-    }
-
     /**
      * Redeclare parent method for applying filters after parent method
      * but before adding unions and calculating totals