diff --git a/.travis.yml b/.travis.yml
index 00de92f28a..1995abf080 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -170,7 +170,6 @@ before_install:
           if [[ $PHP = hhvm* ]]; then
               continue
           fi
-          export PHP=$PHP
           phpenv global $PHP
           INI=~/.phpenv/versions/$PHP/etc/conf.d/travis.ini
           if [[ $PHP = 5.* ]]; then
@@ -205,7 +204,7 @@ install:
           git fetch --depth=2 origin refs/pull/$SYMFONY_PHPUNIT_BRIDGE_PR/head
           git rm -rq src/Symfony/Bridge/PhpUnit
           git checkout -q FETCH_HEAD -- src/Symfony/Bridge/PhpUnit
-          SYMFONY_VERSION=$(cat src/Symfony/Bridge/PhpUnit/composer.json | grep '^ *"dev-master". *"[1-9]' | grep -o '[0-9.]*')
+          export SYMFONY_VERSION=$(cat src/Symfony/Bridge/PhpUnit/composer.json | grep '^ *"dev-master". *"[1-9]' | grep -o '[0-9.]*')
           sed -i 's/"symfony\/phpunit-bridge": ".*"/"symfony\/phpunit-bridge": "'$SYMFONY_VERSION'.x@dev"/' composer.json
           rm -rf .phpunit
       fi
@@ -218,7 +217,7 @@ install:
           export SYMFONY_DEPRECATIONS_HELPER=weak &&
           cp composer.json composer.json.orig &&
           echo -e '{\n"require":{'"$(grep phpunit-bridge composer.json)"'"php":"*"},"minimum-stability":"dev"}' > composer.json &&
-          php .github/build-packages.php HEAD^ $(find src/Symfony -mindepth 3 -type f -name composer.json -printf '%h\n') &&
+          php .github/build-packages.php HEAD^ $(find src/Symfony -mindepth 3 -type f -name composer.json -printf '%h\n' | sort) &&
           mv composer.json composer.json.phpunit &&
           mv composer.json.orig composer.json
       fi
@@ -231,12 +230,12 @@ install:
       # For the master branch, when deps=high, the version before master is checked out and tested with the locally patched components
       if [[ $deps = high && $TRAVIS_BRANCH = master ]]; then
           export FLIP='🙃'
-          SYMFONY_VERSION=$(git ls-remote --heads | grep -o '/[1-9].*' | tail -n 1 | sed s/.//) &&
+          export SYMFONY_VERSION=$(git ls-remote --heads | grep -o '/[1-9].*' | tail -n 1 | sed s/.//) &&
           git fetch --depth=2 origin $SYMFONY_VERSION &&
           git checkout -m FETCH_HEAD &&
           export COMPONENTS=$(find src/Symfony -mindepth 3 -type f -name phpunit.xml.dist -printf '%h\n' | sort)
       else
-          SYMFONY_VERSION=$(cat composer.json | grep '^ *"dev-master". *"[1-9]' | grep -o '[0-9.]*')
+          export SYMFONY_VERSION=$(cat composer.json | grep '^ *"dev-master". *"[1-9]' | grep -o '[0-9.]*')
       fi
 
     - |
@@ -268,7 +267,7 @@ install:
     - |
       run_tests () {
           set -e
-          export PHP=$1
+          PHP=$1
           if [[ $PHP != $TRAVIS_PHP_VERSION && $TRAVIS_PULL_REQUEST != false ]]; then
               echo -e "\\n\\e[33;1mIntermediate PHP version $PHP is skipped for pull requests.\\e[0m"
               return
@@ -298,7 +297,6 @@ install:
               echo "$COMPONENTS" | parallel --gnu "tfold {} $PHPUNIT_X {}"
               tfold src/Symfony/Component/Console.tty $PHPUNIT src/Symfony/Component/Console --group tty
               if [[ $PHP = ${MIN_PHP%.*} ]]; then
-                  export PHP=$MIN_PHP
                   echo -e "1\\n0" | xargs -I{} bash -c "tfold src/Symfony/Component/Process.sigchild{} SYMFONY_DEPRECATIONS_HELPER=weak ENHANCE_SIGCHLD={} php-$MIN_PHP/sapi/cli/php .phpunit/phpunit-4.8-1/phpunit --colors=always src/Symfony/Component/Process/"
               fi
           fi