diff --git a/pkgs/development/tools/devpi-client/default.nix b/pkgs/development/tools/devpi-client/default.nix
index 26d96a641263..e70971b670c2 100644
--- a/pkgs/development/tools/devpi-client/default.nix
+++ b/pkgs/development/tools/devpi-client/default.nix
@@ -9,28 +9,28 @@
 pythonPackages.buildPythonApplication rec {
   name = "${pname}-${version}";
   pname = "devpi-client";
-  version = "3.1.0";
+  version = "4.1.0";
 
   src = pythonPackages.fetchPypi {
     inherit pname version;
-    sha256 = "0w47x3lkafcg9ijlaxllmq4886nsc91w49ck1cd7vn2gafkwjkgr";
+    sha256 = "0f5jkvxx9fl8v5vwbwmplqhjsdfgiib7j3zvn0zxd8krvi2s38fq";
   };
 
   checkInputs = with pythonPackages; [
-                    pytest webtest mock
+                    pytest pytestflakes webtest mock
                     devpi-server tox
                     sphinx wheel git mercurial detox
                     setuptools
                     ];
   checkPhase = ''
     export PATH=$PATH:$out/bin
+    export HOME=$TMPDIR # fix tests failing in sandbox due to "/homeless-shelter"
 
     # setuptools do not get propagated into the tox call (cannot import setuptools)
     rm testing/test_test.py
 
     # test_pypi_index_attributes tries to connect to upstream pypi
-    # test_download_release_error is fixed in the next release
-    py.test -k 'not test_pypi_index_attributes and not test_download_release_error' testing
+    py.test -k 'not test_pypi_index_attributes' testing
   '';
 
   LC_ALL = "en_US.UTF-8";