diff --git a/tests/30rooms/04messages.pl b/tests/30rooms/04messages.pl
index e49206e86..9a267a515 100644
--- a/tests/30rooms/04messages.pl
+++ b/tests/30rooms/04messages.pl
@@ -364,7 +364,7 @@
          content => {
             msgtype                          => "m.text",
             body                             => "This is a message",
-            "org.matrix.self_destruct_after" => $now_ms + 500,
+            "org.matrix.self_destruct_after" => $now_ms + 1000,
          },
       )->then( sub {
          await_sync_timeline_contains($user, $room_id, check => sub {
@@ -373,7 +373,7 @@
          })
       })->then( sub {
          # wait for the message to expire
-         delay( 1 )
+         delay( 1.5 )
       })->then( sub {
          my $iter = 0;
          retry_until_success {
diff --git a/tests/50federation/31room-send.pl b/tests/50federation/31room-send.pl
index 7c6c6d279..585d7d56b 100644
--- a/tests/50federation/31room-send.pl
+++ b/tests/50federation/31room-send.pl
@@ -165,7 +165,7 @@
             content => {
                msgtype                          => "m.text",
                body                             => "This is a message",
-               "org.matrix.self_destruct_after" => $now_ms + 500,
+               "org.matrix.self_destruct_after" => $now_ms + 1000,
             },
          )
       })->then( sub {