diff --git a/docker/tests/init.sh b/docker/tests/init.sh
index a7f07de3..ec552230 100755
--- a/docker/tests/init.sh
+++ b/docker/tests/init.sh
@@ -1,159 +1,159 @@
 #!/bin/bash
 set -e
 set -x
 
 rsync -av \
     --exclude=vendor \
     --exclude=composer.lock \
     --exclude=node_modules \
     --exclude=package-lock.json \
     --exclude=public \
     --exclude=storage \
     --exclude=resources/build \
     --exclude=bootstrap \
     --exclude=.gitignore \
     /src/kolabsrc.orig/ /opt/app-root/src/ | tee /tmp/rsync.output
 
 cd /opt/app-root/src/
 
 if [ "$1" == "--refresh" ]; then
     rm -rf storage/framework
     mkdir -p storage/framework/{sessions,views,cache}
 
     find bootstrap/cache/ -type f ! -name ".gitignore" -delete
     ./artisan clear-compiled
     ./artisan cache:clear
 
     # FIXME seems to be required for db seed to function
     composer update
 
     if rpm -qv chromium 2>/dev/null; then
         chver=$(rpmquery --queryformat="%{VERSION}" chromium | awk -F'.' '{print $1}')
         ./artisan dusk:chrome-driver ${chver}
     fi
 
     # Only run npm if something relevant was updated
     if grep -e "package.json" -e "resources" /tmp/rsync.output; then
         npm run dev
     fi
 
     ./artisan db:ping --wait
 
 
     # Unconditionally get the database into shape
     php -dmemory_limit=512M ./artisan migrate:refresh --seed
 
     ./artisan data:import || :
     ./artisan queue:work --stop-when-empty
 
     shift
 fi
 
 ./artisan route:list
 
-EXCLUDE_GROUPS="skipci,ldap,coinbase,mollie,stripe,meet,dns"
+EXCLUDE_GROUPS=${EXCLUDE_GROUPS:-"skipci,ldap,coinbase,mollie,stripe,meet,dns,slow"}
 
 if [ "$1" == "suite-Functional" ]; then
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group skipci,ldap \
         --verbose \
         --testsuite Unit
 
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group skipci,ldap \
         --verbose \
         --testsuite Functional
 elif [ "$1" == "suite-Feature" ]; then
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group "$EXCLUDE_GROUPS" \
         --verbose \
         --testsuite Feature
 elif [ "$1" == "suite-Browser" ]; then
 
     # Can't do browser tests over https
     echo "APP_URL=http://kolab.local" >> .env
     echo "APP_PUBLIC_URL=http://kolab.local" >> .env
     echo "ASSET_URL=http://kolab.local" >> .env
     echo "MEET_SERVER_URLS=http://kolab.local/meetmedia/api/" >> .env
     echo "APP_HEADER_CSP=" >> .env
     echo "APP_HEADER_XFO=" >> .env
 
     ./artisan octane:start --port=80 >/dev/null 2>&1 &
     echo "127.0.0.1 kolab.local admin.kolab.local reseller.kolab.local" >> /etc/hosts
 
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group skipci,ldap,meet,mollie \
         --verbose \
         --testsuite Browser
 elif [ "$1" == "testsuite" ]; then
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group "$EXCLUDE_GROUPS" \
         --verbose \
         --testsuite Unit
 
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group "$EXCLUDE_GROUPS" \
         --verbose \
         --testsuite Functional
 
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group "$EXCLUDE_GROUPS" \
         --verbose \
         --testsuite Feature
 elif [ "$1" == "quicktest" ]; then
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group "$EXCLUDE_GROUPS" \
         --verbose \
         --stop-on-defect \
         --stop-on-error \
         --stop-on-failure \
         --testsuite Unit
 
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group "$EXCLUDE_GROUPS" \
         --verbose \
         --stop-on-defect \
         --stop-on-error \
         --stop-on-failure \
         --testsuite Functional
 
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group "$EXCLUDE_GROUPS" \
         --verbose \
         --stop-on-defect \
         --stop-on-error \
         --stop-on-failure \
         --testsuite Feature
 elif [ "$1" == "shell" ]; then
     exec /bin/bash
 else
     php \
         -dmemory_limit=-1 \
         vendor/bin/phpunit \
         --exclude-group "$EXCLUDE_GROUPS" \
         --verbose \
         --stop-on-defect \
         --stop-on-error \
         --stop-on-failure \
         "$1"
 fi