diff --git a/.travis.yml b/.travis.yml
index f07b5996..96e52618 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,20 +2,10 @@ language: php
 
 php:
   - 5.6
-  - 7
-  - 7.1
-  - hhvm
 
 env:
-  - ENGINE=PDO_MYSQL56
-  - ENGINE=PDO_MYSQL57
   - ENGINE=PDO_MYSQL_MARIADB55
   - ENGINE=PDO_MYSQL_MARIADB10
-  - ENGINE=PDO_PGSQL
-  - ENGINE=SQLite3
-  - ENGINE=GEOS34
-  - ENGINE=GEOS35
-  - ENGINE=GEOS36
 
 before_script:
   - if [[ $ENGINE = PDO_MYSQL56 ]]; then ENGINE=PDO_MYSQL; sudo bash travis/install-mysql-5.6.sh; fi;
diff --git a/travis/install-mariadb.sh b/travis/install-mariadb.sh
index d0443f87..cf0ef700 100644
--- a/travis/install-mariadb.sh
+++ b/travis/install-mariadb.sh
@@ -2,6 +2,9 @@ OS_CODENAME=$(lsb_release --codename --short)
 
 apt-get purge mysql*
 
+sudo rm -rf /etc/mysql
+sudo rm -rf /var/lib/mysql
+
 apt-get install python-software-properties
 apt-key adv --recv-keys --keyserver hkp://keyserver.ubuntu.com:80 0xcbcb082a1bb943db
 add-apt-repository "deb http://ftp.hosteurope.de/mirror/mariadb.org/repo/$VERSION/ubuntu $OS_CODENAME main"