diff --git a/ddl/tests/adminpause/pause_cancel_test.go b/ddl/tests/adminpause/pause_cancel_test.go
index 3ac8851554840..4caac3ce45be5 100644
--- a/ddl/tests/adminpause/pause_cancel_test.go
+++ b/ddl/tests/adminpause/pause_cancel_test.go
@@ -208,7 +208,7 @@ func TestPauseCancelAndRerunIndexStmt(t *testing.T) {
 func TestPauseCancelAndRerunColumnStmt(t *testing.T) {
 	var dom, stmtKit, adminCommandKit = prepareDomain(t)
 
-	require.Nil(t, generateTblUser(stmtKit, 500))
+	require.Nil(t, generateTblUser(stmtKit, 200))
 
 	for _, stmtCase := range columnDDLStmtCase {
 		pauseAndCancelStmt(t, stmtKit, adminCommandKit, dom, &stmtCase)
diff --git a/util/sem/main_test.go b/util/sem/main_test.go
index 64ba584bbe162..51f622233ed16 100644
--- a/util/sem/main_test.go
+++ b/util/sem/main_test.go
@@ -27,6 +27,7 @@ func TestMain(m *testing.M) {
 		goleak.IgnoreTopFunction("github.com/golang/glog.(*fileSink).flushDaemon"),
 		goleak.IgnoreTopFunction("github.com/lestrrat-go/httprc.runFetchWorker"),
 		goleak.IgnoreTopFunction("go.etcd.io/etcd/client/pkg/v3/logutil.(*MergeLogger).outputLoop"),
+		goleak.IgnoreTopFunction("go.opencensus.io/stats/view.(*worker).start"),
 	}
 	goleak.VerifyTestMain(m, opts...)
 }