diff --git a/localtests/test.sh b/localtests/test.sh
index 6c03507..524cf9e 100755
--- a/localtests/test.sh
+++ b/localtests/test.sh
@@ -3,12 +3,88 @@
 set -e
 
 tests_path=$(dirname $0)
-cd $tests_path
+test_logfile=/tmp/gh-ost-test.log
 
-gh-ost-test-mysql-master -e "select 1"
-gh-ost-test-mysql-replica -e "select 1"
+master_host=
+master_port=
+replica_host=
+replica_port=
 
+verify_master_and_replica() {
+  if [ "$(gh-ost-test-mysql-master -e "select 1" -ss)" != "1" ] ; then
+    echo "Cannot verify gh-ost-test-mysql-master"
+    exit 1
+  fi
+  read master_host master_port <<< $(gh-ost-test-mysql-master -e "select @@hostname, @@port" -ss)
+  if [ "$(gh-ost-test-mysql-replica -e "select 1" -ss)" != "1" ] ; then
+    echo "Cannot verify gh-ost-test-mysql-replica"
+    exit 1
+  fi
+  read replica_host replica_port <<< $(gh-ost-test-mysql-replica -e "select @@hostname, @@port" -ss)
+}
+
+test_single() {
+  local test_name
+  test_name="$1"
 
-find . ! -path . -type d | cut -d "/" -f 2 | while read test_name ; do
   echo "Testing: $test_name"
-done
+
+  gh-ost-test-mysql-replica -e "start slave"
+  gh-ost-test-mysql-master test < $tests_path/$test_name/create.sql
+
+  if [ -f $tests_path/$test_name/extra_args ] ; then
+    extra_args=$(cat $tests_path/$test_name/extra_args)
+  fi
+  columns="*"
+  if [ -f $tests_path/$test_name/test_columns ] ; then
+    columns=$(cat $tests_path/$test_name/test_columns)
+  fi
+
+  go run go/cmd/gh-ost/main.go \
+    --user=gh-ost \
+    --password=gh-ost \
+    --host=$replica_host \
+    --port=$replica_port \
+    --database=test \
+    --table=gh_ost_test \
+    --alter="engine=innodb" \
+    --exact-rowcount \
+    --switch-to-rbr \
+    --initially-drop-old-table \
+    --initially-drop-ghost-table \
+    --throttle-query="select timestampdiff(second, min(last_update), now()) < 5 from _gh_ost_test_ghc" \
+    --serve-socket-file=/tmp/gh-ost.test.sock \
+    --initially-drop-socket-file \
+    --postpone-cut-over-flag-file=/tmp/gh-ost.postpone.flag \
+    --test-on-replica \
+    --verbose \
+    --debug \
+    --stack \
+    --execute $extra_args \
+    1> $test_logfile 2>&1
+
+    if [ $? -ne 0 ] ; then
+      echo "ERROR $test_name execution failure. See $test_logfile"
+      return 1
+    fi
+
+    orig_checksum=$(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 ${columns} from _gh_ost_test_gho" -ss | md5sum)
+
+    gh-ost-test-mysql-replica -e "start slave"
+
+    if [ "$orig_checksum" != "$ghost_checksum" ] ; then
+      echo "ERROR $test_name: checksum mismatch"
+      return 1
+    fi
+    echo "pass"
+}
+
+test_all() {
+  find $tests_path ! -path . -type d -mindepth 1 -maxdepth 1 | cut -d "/" -f 3 | while read test_name ; do
+    test_single "$test_name"
+  done
+}
+
+verify_master_and_replica
+test_all