diff --git a/.travis.yml b/.travis.yml
index 783e1acc1a..56b599727c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -45,18 +45,22 @@ install:
   - travis_retry composer install --prefer-dist --no-interaction
   - tests/unit/data/travis/mongodb-setup.sh
 # TODO: APC currently fails composer. https://github.com/composer/composer/issues/3405
-#  - tests/unit/data/travis/apc-setup.sh
+  - tests/unit/data/travis/apc-setup.sh
   - tests/unit/data/travis/memcache-setup.sh
   - tests/unit/data/travis/cubrid-setup.sh
-# print elasticsearch version
-  - curl http://localhost:9200
 # codeception
   - travis_retry composer global require "codeception/codeception=2.0.*" "codeception/specify=*" "codeception/verify=*"
 # basic and advanced application:
   - tests/unit/data/travis/setup-apps.sh
 
 before_script:
+  # show some versions and env information
   - echo 'elasticsearch version ' && curl http://localhost:9200/
+  - php -r "echo INTL_ICU_VERSION;"
+  - mysql --version
+  - psql --version
+
+  # initialize databases
   - mysql -e 'CREATE DATABASE yiitest;';
   - psql -U postgres -c 'CREATE DATABASE yiitest;';
   - tests/unit/data/travis/sphinx-setup.sh
diff --git a/tests/unit/data/travis/mongodb-setup.sh b/tests/unit/data/travis/mongodb-setup.sh
index 3fbc4e37ec..13e01c2931 100755
--- a/tests/unit/data/travis/mongodb-setup.sh
+++ b/tests/unit/data/travis/mongodb-setup.sh
@@ -9,10 +9,10 @@ else
   echo "extension = mongo.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
 fi
 
-# show mongodb version
+echo "MongoDB Server version:"
 mongod --version
 
-# show mongo PHP extension version
+echo "MongoDB PHP Extension version:"
 php -i |grep mongo -4 |grep -2 Version
 
 # enable text search