diff --git a/pkg/lightning/lightning_test.go b/pkg/lightning/lightning_test.go
index bbf5e4686..3879e1fb2 100644
--- a/pkg/lightning/lightning_test.go
+++ b/pkg/lightning/lightning_test.go
@@ -194,8 +194,8 @@ func (s *lightningServerSuite) TestRunServer(c *C) {
 			c.Assert(taskCfg.TiDB.Host, Equals, "test.invalid")
 			c.Assert(taskCfg.Mydumper.SourceDir, Equals, fmt.Sprintf("file://demo-path-%d", i))
 			c.Assert(taskCfg.Mydumper.CSV.Separator, Equals, "/")
-		case <-time.After(500 * time.Millisecond):
-			c.Fatalf("task is not queued after 500ms (i = %d)", i)
+		case <-time.After(1500 * time.Millisecond):
+			c.Fatalf("task is not queued after 1500ms (i = %d)", i)
 		}
 	}
 }
diff --git a/tests/lightning_checkpoint/run.sh b/tests/lightning_checkpoint/run.sh
index 95c759751..d2289b414 100755
--- a/tests/lightning_checkpoint/run.sh
+++ b/tests/lightning_checkpoint/run.sh
@@ -57,7 +57,7 @@ for i in $(seq "$TABLE_COUNT"); do
 done
 PARTIAL_IMPORT_QUERY="SELECT *, $OUTER_QUERY AS s FROM (SELECT $INNER_QUERY) _"
 
-for BACKEND in importer tidb local; do
+for BACKEND in importer local; do
   if [ "$BACKEND" = 'local' ]; then
     check_cluster_version 4 0 0 'local backend' || continue
   fi