diff --git a/gnu/tests/docker.scm b/gnu/tests/docker.scm
index c70c3ddb9e..cbb856b016 100644
--- a/gnu/tests/docker.scm
+++ b/gnu/tests/docker.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2019 Danny Milosavljevic <dannym@scratchpost.org>
-;;; Copyright © 2019, 2020 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -207,7 +207,7 @@ (define vm
      ;; load' must be able to store the whole image into memory, hence the
      ;; huge memory requirements.  We should avoid the volatile-root setup
      ;; instead.
-     (memory-size 4000)
+     (memory-size 4500)
      (port-forwardings '())))
 
   (define test