diff --git a/tests/plugins/channeld_fakenet.c b/tests/plugins/channeld_fakenet.c
index 7714b9d79..dd1d318c0 100644
--- a/tests/plugins/channeld_fakenet.c
+++ b/tests/plugins/channeld_fakenet.c
@@ -132,7 +132,8 @@ static u64 channel_range(const struct info *info,
 			 const struct short_channel_id_dir *scidd,
 			 u64 min, u64 max)
 {
-	return min + (siphash24(&info->seed, scidd, sizeof(scidd)) % max);
+	assert(max != min);
+	return min + (siphash24(&info->seed, scidd, sizeof(scidd)) % (max - min));
 }
 
 void ecdh(const struct pubkey *point, struct secret *ss)
@@ -840,7 +841,7 @@ found_next:
 	dfwd->expected = next;
 
 	/* Delay 0.1 - 1 seconds, but skewed lower */
-	msec_delay = channel_range(info, &scidd, 0, 900);
+	msec_delay = channel_range(info, &scidd, 1, 900);
 	msec_delay = 100 + channel_range(info, &scidd, 0, msec_delay);
 
 	status_debug("Delaying %u msec for %s",