diff --git a/test/aprsme/device_identification_test.exs b/test/aprsme/device_identification_test.exs
index 17793b3..a2dade6 100644
--- a/test/aprsme/device_identification_test.exs
+++ b/test/aprsme/device_identification_test.exs
@@ -203,6 +203,17 @@ defmodule Aprsme.DeviceIdentificationTest do
     end
   end
 
+  describe "fetch_and_upsert_devices circuit-breaker path" do
+    test "returns an error tuple when circuit breaker rejects or HTTP fails" do
+      # This just exercises the fetch_and_upsert_devices path, which runs via
+      # Aprsme.CircuitBreaker.call/3. Without an HTTP stub, this will get an
+      # error back from either the breaker or the underlying Req call.
+      result = DeviceIdentification.fetch_and_upsert_devices()
+
+      assert match?({:error, _}, result) or result == :ok
+    end
+  end
+
   describe "lookup_device_from_db fallback when cache is unavailable" do
     test "lookup_device_by_identifier falls back to direct DB when DeviceCache is unavailable" do
       Repo.delete_all(Devices)