diff --git a/test/box_test.go b/test/box_test.go
index 5009cc63a7..621c00dafb 100644
--- a/test/box_test.go
+++ b/test/box_test.go
@@ -113,7 +113,7 @@ func testSuitLargeUDP(t *testing.T, clientPort uint16, testPort uint16) {
 	require.NoError(t, testPingPongWithPacketConn(t, testPort, dialUDP))
 	require.NoError(t, testLargeDataWithConn(t, testPort, dialTCP))
 	require.NoError(t, testLargeDataWithPacketConn(t, testPort, dialUDP))
-	require.NoError(t, testLargeDataWithPacketConnSize(t, testPort, 5000, dialUDP))
+	require.NoError(t, testLargeDataWithPacketConnSize(t, testPort, 4096, dialUDP))
 }
 
 func testTCP(t *testing.T, clientPort uint16, testPort uint16) {