diff --git a/tests/settings.py b/tests/settings.py
index dc36d4c..b73ca8a 100644
--- a/tests/settings.py
+++ b/tests/settings.py
@@ -4,3 +4,8 @@ BIJOE_INIT_SQL = [
 ]
 PAGE_LENGTH = 0
 SELECT2_CACHE_PREFIX = 'select2_'
+
+if 'postgres' in DATABASES['default']['ENGINE']:
+    for key in ('PGPORT', 'PGHOST', 'PGUSER', 'PGPASSWORD'):
+        if key in os.environ:
+            DATABASES['default'][key[2:]] = os.environ[key]
diff --git a/tox.ini b/tox.ini
index d9eeaf4..523669a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -44,9 +44,10 @@ deps =
 	django32: Django-Select2>7.7,<7.8
 	django32: djangorestframework>=3.7
 	django32: https://git.entrouvert.org/entrouvert/hobo/archive/main.tar.gz
+allowlist_externals = pg_virtualenv
 commands =
         python setup.py compile_translations
-        py3-django32: py.test {posargs: --junitxml=test_{envname}_results.xml --cov-report xml --cov-report html --cov=bijoe --cov-config=tox.ini --numprocesses {env:NUMPROCESSES:1} tests/}
+        pg_virtualenv -owal_level=minimal -omax_wal_senders=0 -owal_log_hints=off -ocheckpoint_timeout=1d -osynchronous_commit=off -ofull_page_writes=off -ofsync=off py.test {posargs: --junitxml=test_{envname}_results.xml --cov-report xml --cov-report html --cov=bijoe --cov-config=tox.ini --numprocesses {env:NUMPROCESSES:1} tests/}
 
 [pytest]
 filterwarnings =