diff --git a/internal/uploads/worker_duration_test.go b/internal/uploads/worker_duration_test.go
index cae4b18..8d6ede6 100644
--- a/internal/uploads/worker_duration_test.go
+++ b/internal/uploads/worker_duration_test.go
@@ -104,6 +104,8 @@ func TestWorkerDuration_TheShortfallNoteIsPinnedAtEightyPercentAndTwoMinutes(t *
 		noted   bool
 	}{
 		{"79 percent of an hour", 60 * time.Minute, 0.79 * 3600, true},
+		{"exactly 80 percent of an hour", 60 * time.Minute, 2880, false},
+		{"one second under 80 percent of an hour", 60 * time.Minute, 2879, true},
 		{"81 percent of an hour", 60 * time.Minute, 0.81 * 3600, false},
 		{"exactly two minutes short and under 80 percent", 6 * time.Minute, 4 * 60, false},
 		{"two minutes and a second short and under 80 percent", 6 * time.Minute, 4*60 - 1, true},