diff --git a/docker/test/integration/kerberos_kdc/Dockerfile b/docker/test/integration/kerberos_kdc/Dockerfile
index 7805d8f1d1c..a203c33a331 100644
--- a/docker/test/integration/kerberos_kdc/Dockerfile
+++ b/docker/test/integration/kerberos_kdc/Dockerfile
@@ -1,5 +1,7 @@
 # docker build -t clickhouse/kerberos-kdc .
-FROM centos:7
+FROM centos:6
+
+RUN sed -i '/^mirrorlist/s/^/#/;/^#baseurl/{s/#//;s/mirror.centos.org\/centos\/$releasever/vault.centos.org\/6.10/}' /etc/yum.repos.d/*B*
 
 RUN yum install -y ca-certificates krb5-server krb5-libs krb5-auth-dialog krb5-workstation
 
diff --git a/docker/test/integration/runner/compose/docker_compose_kerberized_hdfs.yml b/docker/test/integration/runner/compose/docker_compose_kerberized_hdfs.yml
index 236c4f10b01..88be3e45085 100644
--- a/docker/test/integration/runner/compose/docker_compose_kerberized_hdfs.yml
+++ b/docker/test/integration/runner/compose/docker_compose_kerberized_hdfs.yml
@@ -4,7 +4,7 @@ services:
   kerberizedhdfs1:
     cap_add:
       - DAC_READ_SEARCH
-    image: clickhouse/kerberized-hadoop:16621
+    image: clickhouse/kerberized-hadoop
     hostname: kerberizedhdfs1
     restart: always
     volumes:
diff --git a/tests/integration/test_mysql_protocol/golang.reference b/tests/integration/test_mysql_protocol/golang.reference
index 082149b4644..4069b2a086a 100644
--- a/tests/integration/test_mysql_protocol/golang.reference
+++ b/tests/integration/test_mysql_protocol/golang.reference
@@ -1,7 +1,7 @@
 Columns:
 a
 Column types:
-a BIGINT
+a UNSIGNED BIGINT
 Result:
 0
 1
@@ -10,14 +10,15 @@ name
 a
 Column types:
 name CHAR
-a TINYINT
+a UNSIGNED TINYINT
 Result:
 tables 1
+tables 1
 Columns:
 a
 b
 Column types:
 a CHAR
-b TINYINT
+b UNSIGNED TINYINT
 Result:
 тест 1