diff --git a/.travis.yml b/.travis.yml
index dafc63c52..256029607 100755
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ sudo: required
 dist: xenial
 services:
   - redis-server
+  - xvfb
 cache:
   directories:
     - $GDALINST
@@ -17,10 +18,6 @@ before_install:
   - travis_wait 30 ./misc/install_gdal.sh
   - export PATH=$GDALINST/gdal-2.2.3/bin:$PATH
   - export LD_LIBRARY_PATH=$GDALINST/gdal-2.2.3/lib:$LD_LIBRARY_PATH
-  - "export DISPLAY=:99.0"
-  - "sh -e /etc/init.d/xvfb start"
-  - sleep 3
-  - fluxbox >/dev/null 2>&1 &
 install:
   - npm -g install topojson
   - pip install --upgrade "setuptools>=25.1" pip
diff --git a/client/js/webworker_jointure.js b/client/js/webworker_jointure.js
index b54953520..ab8da3343 100644
--- a/client/js/webworker_jointure.js
+++ b/client/js/webworker_jointure.js
@@ -45,5 +45,5 @@ onmessage = function (e) {
       }
     }
   }
-  postMessage([data_manager.field_join_map, hits]);
+  postMessage([field_join_map, hits]);
 };
diff --git a/magrit_app/static/dist/webworker_jointure.js b/magrit_app/static/dist/webworker_jointure.js
index b54953520..ab8da3343 100644
--- a/magrit_app/static/dist/webworker_jointure.js
+++ b/magrit_app/static/dist/webworker_jointure.js
@@ -45,5 +45,5 @@ onmessage = function (e) {
       }
     }
   }
-  postMessage([data_manager.field_join_map, hits]);
+  postMessage([field_join_map, hits]);
 };