Your description was diferent from your code so I guessed... I think this is close to what you want...
Sub Test()
Dim WS_Count As Integer
Dim I As Integer
WS_Count = ActiveWorkbook.Worksheets.Count
For I = 1 To WS_Count
' ONLY IF it is not TEST
If ActiveWorkbook.Worksheets(I).Name <> "TEST" Then
ActiveWorkbook.Worksheets("TEST").Cells(1, 3) = ActiveWorkbook.Worksheets(I).Cells(7, 10)
End If
Next I
End Sub