diff --git a/modules/tableEmbed.ts b/modules/tableEmbed.ts
index 1ee90c7a56..1eb962ba30 100644
--- a/modules/tableEmbed.ts
+++ b/modules/tableEmbed.ts
@@ -1,4 +1,5 @@
 import Delta, { OpIterator } from 'quill-delta';
+import Op from 'quill-delta/dist/Op';
 import Module from '../core/module';
 
 export type CellData = {
@@ -6,9 +7,13 @@ export type CellData = {
   attributes?: Record<string, unknown>;
 };
 
+export type TableRowColumnOp = Omit<Op, 'insert'> & {
+  insert?: { id: string };
+};
+
 export interface TableData {
-  rows?: Delta['ops'];
-  columns?: Delta['ops'];
+  rows?: TableRowColumnOp[];
+  columns?: TableRowColumnOp[];
   cells?: Record<string, CellData>;
 }
 
diff --git a/test/random.js b/test/random.js
index 349068f19b..7a5b58c7c4 100644
--- a/test/random.js
+++ b/test/random.js
@@ -14,7 +14,7 @@ const getRandomRowColumnId = () => {
         .map(() => characters.charAt(Math.floor(Math.random() * characters.length)))
         .join('');
 };
-const attachAttributes = obj => {
+const attachAttributes = (obj) => {
     const getRandomAttributes = () => {
         const attributeCount = random([1, 4, 8]);
         const allowedAttributes = ['align', 'background', 'color', 'font'];
@@ -26,8 +26,10 @@ const attachAttributes = obj => {
         return attributes;
     };
     if (random([true, false])) {
+        // @ts-expect-error
         obj.attributes = getRandomAttributes();
     }
+    // @ts-expect-error
     return obj;
 };
 const getRandomCellContent = () => {
@@ -90,10 +92,10 @@ const getRandomChange = base => {
     });
     return new Delta([attachAttributes({ retain: { 'table-embed': table } })]);
 };
-const getRandomRowColumnInsert = count => {
-    return new Delta(new Array(count)
+const getRandomRowColumnInsert = (count) => {
+    return new Array(count)
         .fill(0)
-        .map(() => attachAttributes({ insert: { id: getRandomRowColumnId() } }))).ops;
+        .map(() => attachAttributes({ insert: { id: getRandomRowColumnId() } }));
 };
 const getRandomBase = () => {
     const rowCount = random([0, 1, 2, 3]);
diff --git a/test/random.ts b/test/random.ts
index 346fbf7135..46cfda8ec0 100644
--- a/test/random.ts
+++ b/test/random.ts
@@ -1,5 +1,9 @@
 import Delta from 'quill-delta';
-import TableEmbed, { TableData } from '../modules/tableEmbed';
+import TableEmbed, {
+  CellData,
+  TableData,
+  TableRowColumnOp,
+} from '../modules/tableEmbed';
 
 // Random testing in order to find unknown issues.
 
@@ -18,7 +22,9 @@ const getRandomRowColumnId = () => {
     .join('');
 };
 
-const attachAttributes = obj => {
+const attachAttributes = <T extends object>(
+  obj: T,
+): T & { attributes: Record<string, unknown> } => {
   const getRandomAttributes = () => {
     const attributeCount = random([1, 4, 8]);
     const allowedAttributes = ['align', 'background', 'color', 'font'];
@@ -30,8 +36,10 @@ const attachAttributes = obj => {
     return attributes;
   };
   if (random([true, false])) {
+    // @ts-expect-error
     obj.attributes = getRandomAttributes();
   }
+  // @ts-expect-error
   return obj;
 };
 
@@ -104,12 +112,12 @@ const getRandomChange = base => {
   return new Delta([attachAttributes({ retain: { 'table-embed': table } })]);
 };
 
-const getRandomRowColumnInsert = count => {
-  return new Delta(
-    new Array(count)
-      .fill(0)
-      .map(() => attachAttributes({ insert: { id: getRandomRowColumnId() } })),
-  ).ops;
+const getRandomRowColumnInsert = (count: number): TableRowColumnOp[] => {
+  return new Array(count)
+    .fill(0)
+    .map<TableRowColumnOp>(() =>
+      attachAttributes({ insert: { id: getRandomRowColumnId() } }),
+    );
 };
 
 const getRandomBase = () => {
@@ -126,7 +134,7 @@ const getRandomBase = () => {
       const row = random(rowCount);
       const column = random(columnCount);
       const identity = `${row + 1}:${column + 1}`;
-      const cell = attachAttributes({});
+      const cell: CellData = attachAttributes({});
       if (random([true, false])) {
         cell.content = getRandomCellContent();
       }