Use pip==20.2.4 in tox venv

pip 20.3 is disruptive and would lead to big changes in stable
branches.

Change-Id: Ifc4abd2d1f28bfb63ba66796e1690b398c1e4760
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index 5fca42af..3e8fd4b4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,6 +3,7 @@ envlist = docs,pep8,pylint,yamllint,ansiblelint,bashate,py38,cover,perm
 skipsdist = True
 
 [testenv]
+pip_version = pip==20.2.4
 usedevelop = True
 deps =
   -c{toxinidir}/upper-constraints.txt