diff --git a/.travis.yml b/.travis.yml
index a040342b2e6..c7f63c2ef33 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -275,26 +275,26 @@ script:
   set +e
   cd htdocs/install
   php upgrade.php 3.5.0 3.6.0 ignoredbversion > $TRAVIS_BUILD_DIR/upgrade350360.log
-  php upgrade2.php 3.5.0 3.6.0 > $TRAVIS_BUILD_DIR/upgrade350360-2.log
-  php step5.php 3.5.0 3.6.0 > $TRAVIS_BUILD_DIR/upgrade350360-3.log
+  php upgrade2.php 3.5.0 3.6.0 >> $TRAVIS_BUILD_DIR/upgrade350360-2.log
+  php step5.php 3.5.0 3.6.0 >> $TRAVIS_BUILD_DIR/upgrade350360-3.log
   php upgrade.php 3.6.0 3.7.0 ignoredbversion > $TRAVIS_BUILD_DIR/upgrade360370.log
-  php upgrade2.php 3.6.0 3.7.0 > $TRAVIS_BUILD_DIR/upgrade360370-2.log
-  php step5.php 3.6.0 3.7.0 > $TRAVIS_BUILD_DIR/upgrade360370-3.log
+  php upgrade2.php 3.6.0 3.7.0 >> $TRAVIS_BUILD_DIR/upgrade360370-2.log
+  php step5.php 3.6.0 3.7.0 >> $TRAVIS_BUILD_DIR/upgrade360370-3.log
   php upgrade.php 3.7.0 3.8.0 ignoredbversion > $TRAVIS_BUILD_DIR/upgrade370380.log
-  php upgrade2.php 3.7.0 3.8.0 > $TRAVIS_BUILD_DIR/upgrade370380-2.log
-  php step5.php 3.7.0 3.8.0 > $TRAVIS_BUILD_DIR/upgrade370380-3.log
+  php upgrade2.php 3.7.0 3.8.0 >> $TRAVIS_BUILD_DIR/upgrade370380-2.log
+  php step5.php 3.7.0 3.8.0 >> $TRAVIS_BUILD_DIR/upgrade370380-3.log
   php upgrade.php 3.8.0 3.9.0 ignoredbversion > $TRAVIS_BUILD_DIR/upgrade380390.log
-  php upgrade2.php 3.8.0 3.9.0 > $TRAVIS_BUILD_DIR/upgrade380390-2.log
-  php step5.php 3.8.0 3.9.0 > $TRAVIS_BUILD_DIR/upgrade380390-3.log
+  php upgrade2.php 3.8.0 3.9.0 >> $TRAVIS_BUILD_DIR/upgrade380390-2.log
+  php step5.php 3.8.0 3.9.0 >> $TRAVIS_BUILD_DIR/upgrade380390-3.log
   php upgrade.php 3.9.0 4.0.0 ignoredbversion > $TRAVIS_BUILD_DIR/upgrade390400.log
-  php upgrade2.php 3.9.0 4.0.0 MAIN_MODULE_API,MAIN_MODULE_SUPPLIERPROPOSAL > $TRAVIS_BUILD_DIR/upgrade390400-2.log
-  php step5.php 3.9.0 4.0.0 > $TRAVIS_BUILD_DIR/upgrade390400-3.log
+  php upgrade2.php 3.9.0 4.0.0 MAIN_MODULE_API,MAIN_MODULE_SUPPLIERPROPOSAL >> $TRAVIS_BUILD_DIR/upgrade390400-2.log
+  php step5.php 3.9.0 4.0.0 >> $TRAVIS_BUILD_DIR/upgrade390400-3.log
   php upgrade.php 4.0.0 5.0.0 ignoredbversion > $TRAVIS_BUILD_DIR/upgrade400500.log
-  php upgrade2.php 4.0.0 5.0.0 MAIN_MODULE_API,MAIN_MODULE_SUPPLIERPROPOSAL > $TRAVIS_BUILD_DIR/upgrade400500-2.log
-  php step5.php 4.0.0 5.0.0 > $TRAVIS_BUILD_DIR/upgrade400500-3.log
+  php upgrade2.php 4.0.0 5.0.0 MAIN_MODULE_API,MAIN_MODULE_SUPPLIERPROPOSAL >> $TRAVIS_BUILD_DIR/upgrade400500-2.log
+  php step5.php 4.0.0 5.0.0 >> $TRAVIS_BUILD_DIR/upgrade400500-3.log
   php upgrade.php 5.0.0 6.0.0 ignoredbversion > $TRAVIS_BUILD_DIR/upgrade500600.log
-  php upgrade2.php 5.0.0 6.0.0 MAIN_MODULE_API,MAIN_MODULE_SUPPLIERPROPOSAL > $TRAVIS_BUILD_DIR/upgrade500600-2.log
-  php step5.php 5.0.0 6.0.0 > $TRAVIS_BUILD_DIR/upgrade500600-3.log
+  php upgrade2.php 5.0.0 6.0.0 MAIN_MODULE_API,MAIN_MODULE_SUPPLIERPROPOSAL >> $TRAVIS_BUILD_DIR/upgrade500600-2.log
+  php step5.php 5.0.0 6.0.0 >> $TRAVIS_BUILD_DIR/upgrade500600-3.log
   cd -
   set +e
   echo