diff --git a/test/towerops/snmp/deferred_discovery_test.exs b/test/towerops/snmp/deferred_discovery_test.exs
index 3bcfbc7f..87aedbea 100644
--- a/test/towerops/snmp/deferred_discovery_test.exs
+++ b/test/towerops/snmp/deferred_discovery_test.exs
@@ -67,8 +67,9 @@ defmodule Towerops.Snmp.DeferredDiscoveryTest do
         DeferredDiscovery.slow_check(
           client_opts,
           fn ->
-            Process.sleep(30)
-            {:ok, "too slow"}
+            receive do
+              :never -> {:ok, "too slow"}
+            end
           end,
           timeout: 25,
           default: []
@@ -84,8 +85,9 @@ defmodule Towerops.Snmp.DeferredDiscoveryTest do
         DeferredDiscovery.slow_check(
           client_opts,
           fn ->
-            Process.sleep(30)
-            {:ok, "too slow"}
+            receive do
+              :never -> {:ok, "too slow"}
+            end
           end,
           timeout: 25,
           default: %{status: :timeout}