diff --git a/README.md b/README.md
index d3c815d..846dbf9 100644
--- a/README.md
+++ b/README.md
@@ -117,9 +117,9 @@ To import a SQL backup which is stored for example in the folder `/tmp` in the h
 Where `<user>` and `<pass>` are the database username and password set earlier and `<dump.sql>` is the name of the SQL file to be imported.
 
 
-Relication - Master/Slave
+Replication - Master/Slave
 -------------------------
-To use MySQL replication, please set environment variable `REPLICATION_MASTER`/`REPLICATION_SLAVE` to `ture`. Also, on master side, you may want to specify `REPLICATION_USER` and `REPLICATION_PASS` for the account to perform replicaiton, the default value is `replica:replica`
+To use MySQL replication, please set environment variable `REPLICATION_MASTER`/`REPLICATION_SLAVE` to `ture`. Also, on master side, you may want to specify `REPLICATION_USER` and `REPLICATION_PASS` for the account to perform replication, the default value is `replica:replica`
 
 Examples:
 - Master MySQL
@@ -137,7 +137,7 @@ Environment variables
 `MYSQL_USER`: Set a specific username for the admin account (default 'admin')
 `MYSQL_PASS`: Set a specific password for the admin account.
 
-Compatibiliity Issues
+Compatibility Issues
 --------------------
 
 - Volume created by MySQL 5.6 cannot be used in MySQL 5.5 Images or MariaDB images
diff --git a/circle.yml b/circle.yml
index 360ad77..eb6d365 100644
--- a/circle.yml
+++ b/circle.yml
@@ -7,7 +7,21 @@ dependencies:
     - docker build -t mysql-5.6 5.6/
 test:
   override:
+    # test mysql 5.5
     - docker run -d -p 13306:3306 -e MYSQL_USER="user" -e MYSQL_PASS="test" mysql-5.5; sleep 20
-    - mysqladmin -uuser -ptest ping -h127.0.0.1 -P13306 | grep -c "mysqld is alive"
+    - mysqladmin -uuser -ptest -h127.0.0.1 -P13306 ping | grep -c "mysqld is alive"
+    # test mysql 5.6
     - docker run -d -p 13307:3306 -e MYSQL_USER="user" -e MYSQL_PASS="test" mysql-5.6; sleep 20
-    - mysqladmin -uuser -ptest ping -h127.0.0.1 -P13307 | grep -c "mysqld is alive"
\ No newline at end of file
+    - mysqladmin -uuser -ptest -h127.0.0.1 -P13307 ping | grep -c "mysqld is alive"
+    # test replication 5.5
+    - docker run -d -e MYSQL_USER=user -e MYSQL_PASS=test -e REPLICATION_MASTER=true -e REPLICATION_USER=repl -e REPLICATION_PASS=repl -p 13308:3306 --name mysql55master mysql-5.5; sleep 20
+    - docker run -d -e MYSQL_USER=user -e MYSQL_PASS=test -e REPLICATION_SLAVE=true -p 13309:3306 --link mysql55master:mysql mysql-5.5; sleep 20
+    - docker logs mysql55master | grep "repl:repl"
+    - mysql -uuser -ptest -h127.0.0.1 -P13308 -e "show master status\G;" | grep "mysql-bin.*"
+    - mysql -uuser -ptest -h127.0.0.1 -P13309 -e "show slave status\G;" | grep "Slave_IO_Running.*Yes"
+    # test replication 5.6
+    - docker run -d -e MYSQL_USER=user -e MYSQL_PASS=test -e REPLICATION_MASTER=true -e REPLICATION_USER=repl -e REPLICATION_PASS=repl -p 13310:3306 --name mysql56master mysql-5.6; sleep 20
+    - docker run -d -e MYSQL_USER=user -e MYSQL_PASS=test -e REPLICATION_SLAVE=true -p 13311:3306 --link mysql56master:mysql mysql-5.6; sleep 20
+    - docker logs mysql56master | grep "repl:repl"
+    - mysql -uuser -ptest -h127.0.0.1 -P13310 -e "show master status\G;" | grep "mysql-bin.*"
+    - mysql -uuser -ptest -h127.0.0.1 -P13311 -e "show slave status\G;" | grep "Slave_IO_Running.*Yes"