diff --git a/app/code/Magento/Developer/Model/Di/PluginList.php b/app/code/Magento/Developer/Model/Di/PluginList.php
index 0a1df8a974242..fc342b5051000 100644
--- a/app/code/Magento/Developer/Model/Di/PluginList.php
+++ b/app/code/Magento/Developer/Model/Di/PluginList.php
@@ -145,7 +145,10 @@ private function addPluginToList($pluginInstance, $pluginMethod, $methodTypes, $
             if (!array_key_exists($pluginInstance, $this->pluginList[$this->pluginTypeMapping[$typeCode]])) {
                 $this->pluginList[$this->pluginTypeMapping[$typeCode]][$pluginInstance] = [];
             }
-            $this->pluginList[$this->pluginTypeMapping[$typeCode]][$pluginInstance][] = $pluginMethod ;
+
+            if (!in_array($pluginMethod, $this->pluginList[$this->pluginTypeMapping[$typeCode]][$pluginInstance])) {
+                $this->pluginList[$this->pluginTypeMapping[$typeCode]][$pluginInstance][] = $pluginMethod;
+            }
         }
     }
 }