diff --git a/tox.ini b/tox.ini
index 6e8c7ae..a632e51 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,75 +1,87 @@
 [tox]
 envlist = black,flake8,mypy,py3
 
 [testenv]
 extras =
   testing
 deps =
   pytest-cov
 commands =
+  # Under certain circumstances (e.g. in jenkins), the swh.journal kafka server
+  # fixture (which makes librdkafka spawn internal threads, that can't be torn
+  # down), and the swh.provenance rabbitmq storage server fixture (which is
+  # brought up by multiprocessing within the pytest runner context) poorly
+  # interact, causing the Python interpreter to SIGABRT.
+  # Running the tests for the journal client separately from the rest allow to
+  # isolate the fixtures from one another and lets the tests run to completion.
+  pytest {envsitepackagesdir}/swh/provenance \
+         --cov={envsitepackagesdir}/swh/provenance \
+         --cov-branch \
+         -k 'journal' {posargs}
   pytest --doctest-modules \
          {envsitepackagesdir}/swh/provenance \
          --cov={envsitepackagesdir}/swh/provenance \
-         --cov-branch {posargs}
+         --cov-branch --cov-append \
+         -k 'not journal' {posargs}
 passenv = HOME  # required by pytest-rabbitmq
 
 [testenv:black]
 skip_install = true
 deps =
   black==22.3.0
 commands =
   {envpython} -m black --check swh
 
 [testenv:flake8]
 skip_install = true
 deps =
   flake8==4.0.1
   flake8-bugbear==22.3.23
 commands =
   {envpython} -m flake8
 
 [testenv:mypy]
 extras =
   testing
 deps =
   mypy==0.942
 commands =
   mypy swh
 
 # build documentation outside swh-environment using the current
 # git HEAD of swh-docs, is executed on CI for each diff to prevent
 # breaking doc build
 [testenv:sphinx]
 whitelist_externals = make
 usedevelop = true
 extras =
   testing
 deps =
   # fetch and install swh-docs in develop mode
   -e git+https://forge.softwareheritage.org/source/swh-docs#egg=swh.docs
 
 setenv =
   SWH_PACKAGE_DOC_TOX_BUILD = 1
   # turn warnings into errors
   SPHINXOPTS = -W
 commands =
   make -I ../.tox/sphinx/src/swh-docs/swh/ -C docs
 
 
 # build documentation only inside swh-environment using local state
 # of swh-docs package
 [testenv:sphinx-dev]
 whitelist_externals = make
 usedevelop = true
 extras =
   testing
 deps =
   # install swh-docs in develop mode
   -e ../swh-docs
 
 setenv =
   SWH_PACKAGE_DOC_TOX_BUILD = 1
   # turn warnings into errors
   SPHINXOPTS = -W
 commands =
   make -I ../.tox/sphinx-dev/src/swh-docs/swh/ -C docs