diff --git a/gnu/packages/python-check.scm b/gnu/packages/python-check.scm
index d0bde27e13..b8a0d67f3d 100644
--- a/gnu/packages/python-check.scm
+++ b/gnu/packages/python-check.scm
@@ -1,6 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2019 Ricardo Wurmus <rekado@elephly.net>
-;;; Copyright © 2019 Tobias Geerinckx-Rice <me@tobias.gr>
+;;; Copyright © 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2019, 2020 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2019 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2019 Hartmut Goebel <h.goebel@crazy-compilers.com>
@@ -722,13 +722,13 @@ (define-public python-pytest-aiohttp
 (define-public python-nbval
   (package
     (name "python-nbval")
-    (version "0.9.5")
+    (version "0.9.6")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "nbval" version))
        (sha256
-        (base32 "1xh2p7g5s5g06caaraf3dsz69bpj7dgw2h3ss67kci789aspnwp8"))))
+        (base32 "0h3xrnw0mj1srigrx2rfnd73h8s0xjycclmjs0vx7qkfyqpcvvyg"))))
     (build-system python-build-system)
     (arguments
      `(#:phases