An image forming apparatus comprising: a controller controlling an image forming unit to form a test image, controlling a measurement unit to measure the test image on an image bearing member, and controlling a transfer unit to transfer the test image formed on the image bearing member to the sheet; a reception unit receiving a user instruction; and a second generation unit generating the conversion condition based on the user instruction and the measurement result of the test image, wherein the test image includes a first test image, a second test image, and an image indicating a position where the sheet is to be bent, and in a case where the sheet is bent along the position, a position of the first test image and a position of the second test image do not overlap with each other.