diff --git a/localtests/mixed-charset/create.sql b/localtests/mixed-charset/create.sql
new file mode 100644
index 0000000..e2861d1
--- /dev/null
+++ b/localtests/mixed-charset/create.sql
@@ -0,0 +1,23 @@
+drop table if exists gh_ost_test;
+create table gh_ost_test (
+  id int auto_increment,
+  t varchar(128)  charset latin1 collate latin1_swedish_ci,
+  tutf8 varchar(128) charset utf8,
+  tutf8mb4 varchar(128) charset utf8mb4,
+  primary key(id)
+) auto_increment=1;
+
+drop event if exists gh_ost_test;
+delimiter ;;
+create event gh_ost_test
+  on schedule every 1 second
+  starts current_timestamp
+  ends current_timestamp + interval 60 second
+  on completion not preserve
+  enable
+  do
+begin
+  insert into gh_ost_test values (null, md5(rand()), md5(rand()), md5(rand()));
+  insert into gh_ost_test values (null, 'átesting', 'átesting', 'átesting');
+  insert into gh_ost_test values (null, 'testátest', 'testátest', '🍻😀');
+end ;;
diff --git a/localtests/test.sh b/localtests/test.sh
index 3362d3f..68588df 100755
--- a/localtests/test.sh
+++ b/localtests/test.sh
@@ -98,15 +98,15 @@ test_single() {
   fi
 
   echo_dot
-  orig_checksum=$(gh-ost-test-mysql-replica test -e "select ${columns} from gh_ost_test" -ss | md5sum)
-  ghost_checksum=$(gh-ost-test-mysql-replica test -e "select ${columns} from _gh_ost_test_gho" -ss | md5sum)
+  orig_checksum=$(gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${columns} from gh_ost_test" -ss | md5sum)
+  ghost_checksum=$(gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${columns} from _gh_ost_test_gho" -ss | md5sum)
 
   if [ "$orig_checksum" != "$ghost_checksum" ] ; then
     echo "ERROR $test_name: checksum mismatch"
     echo "---"
-    gh-ost-test-mysql-replica test -e "select ${columns} from gh_ost_test" -ss
+    gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${columns} from gh_ost_test" -ss
     echo "---"
-    gh-ost-test-mysql-replica test -e "select ${columns} from _gh_ost_test_gho" -ss
+    gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${columns} from _gh_ost_test_gho" -ss
     return 1
   fi
 }