diff --git a/tox.ini b/tox.ini
index 21a156aa54..67e93ea73b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,4 +7,4 @@ deps =
 setenv =
     TRYTOND_DATABASE_URI={env:TRYTOND_DATBASE_URI:sqlite://}
     DB_NAME={env:DB_NAME::memory:}
-install_command = pip install --pre --find-links https://trydevpi.tryton.org/?local_version={env:CI_JOB_ID:{env:CI_BUILD_NUMBER}.{env:CI_JOB_NUMBER}} {opts} {packages}
+install_command = pip install --pre --find-links https://trydevpi.tryton.org/?local_version={env:CI_JOB_ID:{env:CI_BUILD_NUMBER:}.{env:CI_JOB_NUMBER:}} {opts} {packages}