diff --git a/android/app/src/test/java/tv/orbit/classic/EventAppointmentsTest.kt b/android/app/src/test/java/tv/orbit/classic/EventAppointmentsTest.kt
index f6b0a72..9c6dc11 100644
--- a/android/app/src/test/java/tv/orbit/classic/EventAppointmentsTest.kt
+++ b/android/app/src/test/java/tv/orbit/classic/EventAppointmentsTest.kt
@@ -44,4 +44,20 @@ class EventAppointmentsTest {
         assertEquals(3, starts.size)
         assertTrue("late by $starts", starts.all { it in 0..20 })
     }
+
+    @Test fun eligibilityIsWorkedOutAfreshWhenThePoolOrTheBlockChanges() {
+        fun show(t: String) = PoolSeries(t, t, listOf(PoolEpisode("$t-1", "s", EpisodeMark(1, 1), "E1", 1_800_000)))
+        val part = DayPart(0, 24, listOf("A", "B"))
+        val first = listOf(show("A"), show("C"))
+        assertEquals(listOf("A"), dayPartFor(first, listOf(part), monday, zone).first.map { it.title })
+        // A refreshed pool is a new list, even with a show added from the catalogue: it's matched again.
+        val refreshed = listOf(show("A"), show("B"), show("C"))
+        assertEquals(listOf("A", "B"), dayPartFor(refreshed, listOf(part), monday, zone).first.map { it.title })
+        // A changed block (a new release's rules) is a new block: it's matched again too.
+        val widened = part.copy(titles = part.titles + "C")
+        assertEquals(listOf("A", "B", "C"), dayPartFor(refreshed, listOf(widened), monday, zone).first.map { it.title })
+        // And the first pool still gives its own answer.
+        assertEquals(listOf("A"), dayPartFor(first, listOf(part), monday, zone).first.map { it.title })
+    }
+
 }