Incomplete follow-up of tests pending at hospital discharge is a persistent patient safety issue. This cluster-randomized trial used medical record review to assess whether an automated notification of test results to discharging hospitalist physicians and receiving primary care physicians improved follow-up compared with usual care. The intervention was focused on actionable test results, which constituted less than 10% of all pending tests. Even with the intervention, only 60% of tests deemed actionable had any documented follow-up in the medical record, and there was no significant difference compared to usual care. The authors conclude that automated clinician notification does not constitute a sufficient intervention to optimize management of tests pending at discharge. Previous WebM&M commentaries explored problems related to tests pending at discharge and how organizations can improve follow-up of abnormal test results.