diff --git a/.travis.yml b/.travis.yml
index 2a789ec..95562ce 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -55,7 +55,7 @@ before_script:
   - redis-server --port 0 --daemonize yes --aclfile tests/users.acl --unixsocket /tmp/redis.sock
   - for PORT in $(seq 6379 6382) $(seq 32767 32769); do redis-server --port $PORT --daemonize yes --aclfile tests/users.acl; done
   - for PORT in $(seq 7000 7011); do redis-server --port $PORT --cluster-enabled yes --cluster-config-file $PORT.conf --daemonize yes --aclfile tests/users.acl; echo 127.0.0.1:$PORT >> tests/nodes/nodemap; done
-  - for PORT in $(seq 26379 26380); do wget raw.githubusercontent.com/redis/redis/6.0/sentinel.conf -O $PORT.conf; echo sentinel auth-pass mymaster phpredis >> $PORT.conf; redis-server $PORT.conf --port $PORT --daemonize yes --sentinel; done
+  - for PORT in $(seq 26379 26380); do wget raw.githubusercontent.com/redis/redis/6.0/sentinel.conf -O $PORT.conf; sed -i '/^sentinel/d' $PORT.conf; redis-server $PORT.conf --port $PORT --daemonize yes --sentinel monitor mymaster 127.0.0.1 6379 1 --sentinel sentinel auth-pass mymaster phpredis; done
   - echo yes | redis-cli --cluster create $(seq -f 127.0.0.1:%g 7000 7011) --cluster-replicas 3 --user phpredis -a phpredis
   - echo 'extension = redis.so' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
   - openssl req -x509 -newkey rsa:1024 -nodes -keyout stunnel.key -out stunnel.pem -days 1 -subj '/CN=localhost'
diff --git a/redis_sentinel.c b/redis_sentinel.c
index cbdf331..a05a6e6 100644
--- a/redis_sentinel.c
+++ b/redis_sentinel.c
@@ -134,7 +134,7 @@ PHP_METHOD(RedisSentinel, masters)
 
 PHP_METHOD(RedisSentinel, ping)
 {
-    REDIS_PROCESS_KW_CMD("PING", redis_empty_cmd, redis_boolean_response);
+    REDIS_PROCESS_KW_CMD("ping", redis_empty_cmd, redis_boolean_response);
 }
 
 PHP_METHOD(RedisSentinel, reset)
diff --git a/tests/RedisSentinelTest.php b/tests/RedisSentinelTest.php
index 70ea854..bdc9aea 100644
--- a/tests/RedisSentinelTest.php
+++ b/tests/RedisSentinelTest.php
@@ -83,6 +83,12 @@ class Redis_Sentinel_Test extends TestSuite
         }
     }
 
+    public function testMyid()
+    {
+        $result = $this->sentinel->myid();
+        $this->assertTrue(is_string($result));
+    }
+
     public function testPing()
     {
         $this->assertTrue($this->sentinel->ping());