There is still time to find hidden treasure in the fourth precisionFDA challenge! The challenge provides a unique opportunity for test developers to investigate the accuracy of their pipelines by testing the ability to find in silico injected variants in FASTQ files from exome sequencing of reference cell lines. It will be a warm up for the community ahead of a more difficult in silico challenge to come in the fall. The challenge is open until September 12, 2017. To learn more visit: https://precision.fda.gov/challenges/