diff --git a/ClosedXML_Tests/Excel/Styles/NumberFormatTests.cs b/ClosedXML_Tests/Excel/Styles/NumberFormatTests.cs
index 93d9ab5..cf3aa2b 100644
--- a/ClosedXML_Tests/Excel/Styles/NumberFormatTests.cs
+++ b/ClosedXML_Tests/Excel/Styles/NumberFormatTests.cs
@@ -1,10 +1,8 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
+using ClosedXML.Excel;
 using NUnit.Framework;
-using ClosedXML.Excel;
+using System;
 using System.Data;
+using System.Linq;
 
 namespace ClosedXML_Tests.Excel
 {
@@ -21,13 +19,11 @@
                 var table = new DataTable();
                 table.Columns.Add("Date", typeof(DateTime));
 
-                for (int i = 0; i <10; i++)
+                for (int i = 0; i < 10; i++)
                 {
                     table.Rows.Add(new DateTime(2017, 1, 1).AddMonths(i));
                 }
 
-                ws.Cell("B1").Value = table.Columns[0].DataType;
-
                 ws.Cell("A1").InsertData(table.AsEnumerable());
 
                 Assert.AreEqual("yy-MM-dd", ws.Cell("A5").Style.DateFormat.Format);