diff --git a/lib/data/dataTableArgument.js b/lib/data/dataTableArgument.js
index b32953483..aceb328af 100644
--- a/lib/data/dataTableArgument.js
+++ b/lib/data/dataTableArgument.js
@@ -59,7 +59,7 @@ class DataTableArgument {
 
   /** Transposed the data */
   transpose() {
-    this.rawData = this.rawData[0].map((x, i) => this.rawData.map((y) => y[i]));
+    this.rawData = this.rawData[0].map((_, i) => this.rawData.map((y) => y[i]));
   }
 }
 
diff --git a/lib/data/table.js b/lib/data/table.js
index 20981a65a..184b3c66c 100644
--- a/lib/data/table.js
+++ b/lib/data/table.js
@@ -1,14 +1,16 @@
+const DataTableArgument = require("./dataTableArgument");
+
 /**
  * Datatable class to provide data driven testing
  */
 class DataTable {
-  /** @param {Array<*>} array */
+  /** @param {Array<DataTableArgument>} array */
   constructor(array) {
     this.array = array;
     this.rows = new Array(0);
   }
 
-  /** @param {Array<*>} array */
+  /** @param {Array<DataTableArgument>} array */
   add(array) {
     if (array.length !== this.array.length) throw new Error(`There is too many elements in given data array. Please provide data in this format: ${this.array}`);
     const tempObj = {};
@@ -21,7 +23,7 @@ class DataTable {
     this.rows.push({ skip: false, data: tempObj });
   }
 
-  /** @param {Array<*>} array */
+  /** @param {Array<DataTableArgument>} array */
   xadd(array) {
     if (array.length !== this.array.length) throw new Error(`There is too many elements in given data array. Please provide data in this format: ${this.array}`);
     const tempObj = {};
diff --git a/test/data/sandbox/features/step_definitions/my_other_steps.js b/test/data/sandbox/features/step_definitions/my_other_steps.js
index a16033f94..225ca4e6f 100644
--- a/test/data/sandbox/features/step_definitions/my_other_steps.js
+++ b/test/data/sandbox/features/step_definitions/my_other_steps.js
@@ -1,6 +1,6 @@
 const I = actor();
 
-Given('I have products in my cart', (table) => { // eslint-disable-line
+Given('I have products in my cart', (table) => {
   for (const id in table.rows) {
     if (id < 1) {
       continue;
diff --git a/typings/index.d.ts b/typings/index.d.ts
index f8bc4ff33..0cb2d2a8b 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -356,6 +356,28 @@ declare namespace CodeceptJS {
     useForSnippets?: boolean
     preferForRegexpMatch?: boolean
   }
+
+  interface DataTableArgument {
+    rawData: string[][];
+    raw(): string[][];
+    rows(): string[][];
+    hashes(): { [columnHeader: string]: string }[];
+    rowsHash(): { [columnHeader: string]: string };
+    transpose(): string[][];
+  }
+
+  interface DataTable {
+    array: DataTableArgument[];
+    rows: {
+      [key: string]: {
+        skip: boolean;
+        data: DataTableArgument;
+      }
+    };
+    add: (array: DataTableArgument[]) => void;
+    xadd: (array: DataTableArgument[]) => void;
+    filter: (func: (item: DataTableArgument) => boolean) => DataTableArgument[];
+  }
 }
 
 // Globals