Fix Travis tests script line
diff --git a/.travis.yml b/.travis.yml
index 2a0be4d..cfdad64 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,7 +26,7 @@
   - sh -c "if [ '$DB' = 'pgsql' ] || [ '$DB' = 'pdo/pgsql' ]; then psql -c 'create database ci_test;' -U postgres; fi"
   - sh -c "if [ '$DB' = 'mysql' ] || [ '$DB' = 'mysqli' ] || [ '$DB' = 'pdo/mysql' ]; then mysql -e 'create database IF NOT EXISTS ci_test;'; fi"
 
-script: phpunit -d zend.enable_gc=0 -d date.timezone=UTF -d mbstring.func_overload=7 -d mbstring.internal_encoding=UTF-8 vendor/bin/phpunit --coverage-text --configuration tests/travis/$DB.phpunit.xml
+script: php -d zend.enable_gc=0 -d date.timezone=UTF -d mbstring.func_overload=7 -d mbstring.internal_encoding=UTF-8 vendor/bin/phpunit --coverage-text --configuration tests/travis/$DB.phpunit.xml
 
 matrix:
   allow_failures: