diff --git a/tests/core/stub-editor/index.js b/tests/core/stub-editor/index.js
index d346ad2e..d1c30f64 100644
--- a/tests/core/stub-editor/index.js
+++ b/tests/core/stub-editor/index.js
@@ -1,4 +1,3 @@
-import { Editor } from 'slate';
 import { createSdocEditor, formatChildren2 } from '../utils';
 
 class StubEditor {
@@ -8,44 +7,19 @@ class StubEditor {
       throw new Error('Param input is required');
     }
     this.editor = createSdocEditor(input, plugins);
-    this.pendingOperationList = [];
   }
 
   getEditor = () => {
     return this.editor;
-  }
+  };
 
   getContent = () => {
     return formatChildren2(this.editor.children);
-  }
+  };
 
   getStringContent = () => {
     return JSON.stringify(this.getContent());
-  }
-
-  applyOperations = (operations) => {
-    const editor = this.editor;
-    Editor.withoutNormalizing(editor, () => {
-      operations.forEach(op => editor.apply(op));
-    });
-    const ops = editor.operations.slice();
-    this.pendingOperationList.push(ops);
-    editor.operations = [];
-  }
-
-  getPendingOperationList = () => {
-    return this.pendingOperationList;
-  }
-
-  resetPendingOperationList = () => {
-    const { operations } = this.editor;
-    this.pendingOperationList = [];
-    this.pendingOperationList.push(operations);
-  }
-
-  clearPendingOperationList = () => {
-    this.pendingOperationList = [];
-  }
+  };
 
 }
 
diff --git a/tests/core/utils.js b/tests/core/utils.js
index 7b8a9dec..5bcbc463 100644
--- a/tests/core/utils.js
+++ b/tests/core/utils.js
@@ -6,7 +6,7 @@ export const createSdocEditor = (editor, plugins) => {
   });
 
   return editor;
-  
+
 };
 
 export const formatChildren = (node) => {