Methods, apparatuses, and computer program products for authorizing use of a test key signed build are provided. Embodiments include transmitting to an update provider system, unique data associated with a target system; receiving from the update provider system, a signed update capsule file; determining, by the target system, that a signature within the signed update capsule file is valid; in response to determining that the signature is valid, determining that the validation data within the signed update capsule file matches the unique data associated with the target system; and in response to determining that the validation data matches the unique data, determining that the target system is authorized to use a test key signed build to update the firmware of the target system.