diff --git a/test/aprsme/partition_manager_test.exs b/test/aprsme/partition_manager_test.exs
index 0c9edfb..8ed63e4 100644
--- a/test/aprsme/partition_manager_test.exs
+++ b/test/aprsme/partition_manager_test.exs
@@ -9,6 +9,16 @@ defmodule Aprsme.PartitionManagerTest do
     # overlapping ranges with a check_violation. Wipe the parent table
     # so partition tests can freely create/drop partitions.
     Repo.delete_all(Packet)
+
+    # Drop partitions that the migration pre-creates for today..today+2
+    # so ensure_partitions_exist/0 has actual work to do in tests.
+    today = Date.utc_today()
+
+    for offset <- 0..2 do
+      name = PartitionManager.partition_name(Date.add(today, offset))
+      Repo.query!("DROP TABLE IF EXISTS #{name}")
+    end
+
     :ok
   end