The Imps will build up towards the 24/25 season with friendlies at Oldham Athletic and Harrogate Town.
Michael Skubala will take his side to Boundary Park on Saturday 20 July (3pm KO) before making the trip to the EnviroVent Stadium on Saturday 27 July (3pm KO).
Ticket news for the fixtures along with any further pre-season details will be confirmed in due course.
City’s current pre-season schedule:
Friday 12 July (10am BST KO): Preston North End vs Imps (Neutral venue)
Saturday 20 July (3pm KO): Oldham Athletic vs Imps (Boundary Park)
Saturday 27 July (3pm KO): Harrogate Town vs Imps (EnviroVent Stadium)