diff --git a/dumpling/dumpling_test.go b/dumpling/dumpling_test.go
index 42f9378ef6..cd0a0f42bf 100644
--- a/dumpling/dumpling_test.go
+++ b/dumpling/dumpling_test.go
@@ -24,6 +24,7 @@ import (
 	"github.com/pingcap/dm/dm/pb"
 	"github.com/pingcap/dm/pkg/log"
 	"github.com/pingcap/failpoint"
+	"github.com/pingcap/tidb-tools/pkg/filter"
 
 	. "github.com/pingcap/check"
 )
@@ -68,6 +69,9 @@ func (d *testDumplingSuite) SetUpSuite(c *C) {
 		LoaderConfig: config.LoaderConfig{
 			Dir: dir,
 		},
+		BAList: &filter.Rules{
+			DoDBs: []string{"information_schema"},
+		},
 	}
 	c.Assert(log.InitLogger(&log.Config{}), IsNil)
 }
diff --git a/pkg/election/election_test.go b/pkg/election/election_test.go
index 1074098aa7..29061aaf8c 100644
--- a/pkg/election/election_test.go
+++ b/pkg/election/election_test.go
@@ -88,6 +88,7 @@ func (t *testElectionSuite) TearDownTest(c *C) {
 
 func testElection2After1(t *testElectionSuite, c *C, normalExit bool) {
 	var (
+		timeout    = 3 * time.Second
 		sessionTTL = 60
 		key        = "unit-test/election-2-after-1"
 		ID1        = "member1"
@@ -120,7 +121,7 @@ func testElection2After1(t *testElectionSuite, c *C, normalExit bool) {
 	select {
 	case leader := <-e1.LeaderNotify():
 		c.Assert(leader.ID, Equals, ID1)
-	case <-time.After(3 * time.Second):
+	case <-time.After(timeout):
 		c.Fatal("leader campaign timeout")
 	}
 	c.Assert(e1.IsLeader(), IsTrue)
@@ -141,7 +142,7 @@ func testElection2After1(t *testElectionSuite, c *C, normalExit bool) {
 	select {
 	case leader := <-e2.leaderCh:
 		c.Assert(leader.ID, Equals, ID1)
-	case <-time.After(time.Second):
+	case <-time.After(timeout):
 		c.Fatal("leader campaign timeout")
 	}
 	// but the leader should still be e1
@@ -171,7 +172,7 @@ func testElection2After1(t *testElectionSuite, c *C, normalExit bool) {
 	select {
 	case leader := <-e2.LeaderNotify():
 		c.Assert(leader.ID, Equals, ID2)
-	case <-time.After(3 * time.Second):
+	case <-time.After(timeout):
 		c.Fatal("leader campaign timeout")
 	}
 	c.Assert(e2.IsLeader(), IsTrue)
@@ -196,7 +197,7 @@ func testElection2After1(t *testElectionSuite, c *C, normalExit bool) {
 			c.Assert(terror.ErrElectionCampaignFail.Equal(err2), IsTrue)
 			// the old session is done, but we can't create a new one.
 			c.Assert(err2, ErrorMatches, ".*fail to campaign leader: create a new session.*")
-		case <-time.After(time.Second):
+		case <-time.After(timeout):
 			c.Fatal("do not receive error for e2")
 		}
 	}()
@@ -218,6 +219,7 @@ func (t *testElectionSuite) TestElection2After1(c *C) {
 
 func (t *testElectionSuite) TestElectionAlways1(c *C) {
 	var (
+		timeout    = 3 * time.Second
 		sessionTTL = 60
 		key        = "unit-test/election-always-1"
 		ID1        = "member1"
@@ -239,7 +241,7 @@ func (t *testElectionSuite) TestElectionAlways1(c *C) {
 	select {
 	case leader := <-e1.LeaderNotify():
 		c.Assert(leader.ID, Equals, ID1)
-	case <-time.After(3 * time.Second):
+	case <-time.After(timeout):
 		c.Fatal("leader campaign timeout")
 	}
 	c.Assert(e1.IsLeader(), IsTrue)
@@ -270,7 +272,7 @@ func (t *testElectionSuite) TestElectionAlways1(c *C) {
 		select {
 		case err2 := <-e2.ErrorNotify():
 			c.Fatalf("cancel the campaign should not get an error, %v", err2)
-		case <-time.After(time.Second): // wait 1s
+		case <-time.After(timeout): // wait 3s
 		}
 	}()
 	cancel2()
@@ -288,6 +290,7 @@ func (t *testElectionSuite) TestElectionAlways1(c *C) {
 
 func (t *testElectionSuite) TestElectionEvictLeader(c *C) {
 	var (
+		timeout    = 3 * time.Second
 		sessionTTL = 60
 		key        = "unit-test/election-evict-leader"
 		ID1        = "member1"
@@ -309,7 +312,7 @@ func (t *testElectionSuite) TestElectionEvictLeader(c *C) {
 	select {
 	case leader := <-e1.LeaderNotify():
 		c.Assert(leader.ID, Equals, ID1)
-	case <-time.After(3 * time.Second):
+	case <-time.After(timeout):
 		c.Fatal("leader campaign timeout")
 	}
 	c.Assert(e1.IsLeader(), IsTrue)
@@ -354,6 +357,7 @@ func (t *testElectionSuite) TestElectionEvictLeader(c *C) {
 
 func (t *testElectionSuite) TestElectionDeleteKey(c *C) {
 	var (
+		timeout    = 3 * time.Second
 		sessionTTL = 60
 		key        = "unit-test/election-delete-key"
 		ID         = "member"
@@ -373,7 +377,7 @@ func (t *testElectionSuite) TestElectionDeleteKey(c *C) {
 	select {
 	case leader := <-e.LeaderNotify():
 		c.Assert(leader.ID, Equals, ID)
-	case <-time.After(3 * time.Second):
+	case <-time.After(timeout):
 		c.Fatal("leader campaign timeout")
 	}
 	c.Assert(e.IsLeader(), IsTrue)
diff --git a/tests/http_apis/run.sh b/tests/http_apis/run.sh
index 185ce29840..09087cc40b 100644
--- a/tests/http_apis/run.sh
+++ b/tests/http_apis/run.sh
@@ -93,9 +93,11 @@ function run() {
     echo "kill dm-worker1"
     ps aux | grep dm-worker1 |awk '{print $2}'|xargs kill || true
     check_port_offline $WORKER1_PORT 20
+    run_dm_ctl_with_retry $WORK_DIR "127.0.0.1:$MASTER_PORT" \
+        "list-member --worker --name=worker1" \
+        "\"stage\": \"offline\"" 1
     curl -X DELETE 127.0.0.1:$MASTER_PORT/apis/${API_VERSION}/members/worker/worker1 > $WORK_DIR/offline-worker.log
     check_log_contains $WORK_DIR/offline-worker.log "\"result\": true" 1
-
     echo "check data"
     check_sync_diff $WORK_DIR $cur/conf/diff_config.toml
 }