diff --git a/src/cron/scheduler.rs b/src/cron/scheduler.rs
index ce9c6c3..018ab13 100644
--- a/src/cron/scheduler.rs
+++ b/src/cron/scheduler.rs
@@ -218,11 +218,14 @@ fn warn_if_high_frequency_agent_job(job: &CronJob) {
         Schedule::Every { every_ms } => *every_ms < 5 * 60 * 1000,
         Schedule::Cron { .. } => {
             let now = Utc::now();
-            match (
-                next_run_for_schedule(&job.schedule, now),
-                next_run_for_schedule(&job.schedule, now + chrono::Duration::seconds(1)),
-            ) {
-                (Ok(a), Ok(b)) => (b - a).num_minutes() < 5,
+            match next_run_for_schedule(&job.schedule, now) {
+                Ok(first) => {
+                    // Get the occurrence *after* the first one to measure the actual interval.
+                    match next_run_for_schedule(&job.schedule, first) {
+                        Ok(second) => (second - first).num_minutes() < 5,
+                        _ => false,
+                    }
+                }
                 _ => false,
             }
         }