diff --git a/pkg/schedule/core/prepare_checker.go b/pkg/schedule/core/prepare_checker.go
index d7d5ac2e233..3c5432a9812 100644
--- a/pkg/schedule/core/prepare_checker.go
+++ b/pkg/schedule/core/prepare_checker.go
@@ -53,6 +53,9 @@ func (checker *PrepareChecker) Check(c *core.BasicCluster) bool {
 	}
 	notLoadedFromRegionsCnt := c.GetClusterNotFromStorageRegionsCnt()
 	totalRegionsCnt := c.GetTotalRegionCount()
+	if totalRegionsCnt == 0 {
+		return false
+	}
 	// The number of active regions should be more than total region of all stores * core.CollectFactor
 	if float64(totalRegionsCnt)*core.CollectFactor > float64(notLoadedFromRegionsCnt) {
 		return false
diff --git a/server/cluster/cluster_test.go b/server/cluster/cluster_test.go
index 6a8a87c1ed3..cbb4574ca7e 100644
--- a/server/cluster/cluster_test.go
+++ b/server/cluster/cluster_test.go
@@ -2389,12 +2389,12 @@ func (c *testCluster) updateLeaderCount(storeID uint64, leaderCount int) error {
 	return c.setStore(newStore)
 }
 
-func (c *testCluster) addLeaderStore(storeID uint64, leaderCount int) error {
+func (c *testCluster) addLeaderStore(storeID uint64) error {
 	stats := &pdpb.StoreStats{}
 	newStore := core.NewStoreInfo(&metapb.Store{Id: storeID},
 		core.SetStoreStats(stats),
-		core.SetLeaderCount(leaderCount),
-		core.SetLeaderSize(int64(leaderCount)*10),
+		core.SetLeaderCount(1),
+		core.SetLeaderSize(10),
 		core.SetLastHeartbeatTS(time.Now()),
 	)
 
@@ -3083,9 +3083,9 @@ func TestAddScheduler(t *testing.T) {
 	stream := mockhbstream.NewHeartbeatStream()
 
 	// Add stores 1,2,3
-	re.NoError(tc.addLeaderStore(1, 1))
-	re.NoError(tc.addLeaderStore(2, 1))
-	re.NoError(tc.addLeaderStore(3, 1))
+	re.NoError(tc.addLeaderStore(1))
+	re.NoError(tc.addLeaderStore(2))
+	re.NoError(tc.addLeaderStore(3))
 	// Add regions 1 with leader in store 1 and followers in stores 2,3
 	re.NoError(tc.addLeaderRegion(1, 1, 2, 3))
 	// Add regions 2 with leader in store 2 and followers in stores 1,3
@@ -3149,8 +3149,8 @@ func TestPersistScheduler(t *testing.T) {
 	defer cleanup()
 	defaultCount := len(sc.DefaultSchedulers)
 	// Add stores 1,2
-	re.NoError(tc.addLeaderStore(1, 1))
-	re.NoError(tc.addLeaderStore(2, 1))
+	re.NoError(tc.addLeaderStore(1))
+	re.NoError(tc.addLeaderStore(2))
 
 	controller := co.GetSchedulersController()
 	re.Len(controller.GetSchedulerNames(), defaultCount)
@@ -3265,8 +3265,8 @@ func TestRemoveScheduler(t *testing.T) {
 	defer cleanup()
 
 	// Add stores 1,2
-	re.NoError(tc.addLeaderStore(1, 1))
-	re.NoError(tc.addLeaderStore(2, 1))
+	re.NoError(tc.addLeaderStore(1))
+	re.NoError(tc.addLeaderStore(2))
 	defaultCount := len(sc.DefaultSchedulers)
 	controller := co.GetSchedulersController()
 	re.Len(controller.GetSchedulerNames(), defaultCount)
diff --git a/tests/integrations/mcs/scheduling/server_test.go b/tests/integrations/mcs/scheduling/server_test.go
index cb036e8b042..fc07436b92f 100644
--- a/tests/integrations/mcs/scheduling/server_test.go
+++ b/tests/integrations/mcs/scheduling/server_test.go
@@ -500,6 +500,9 @@ func (suite *serverTestSuite) TestStoreLimit() {
 	defer tc.Destroy()
 	leaderServer := suite.pdLeader.GetServer()
 	tc.WaitForPrimaryServing(re)
+	testutil.Eventually(re, func() bool {
+		return leaderServer.GetRaftCluster().IsServiceIndependent(constant.SchedulingServiceName)
+	})
 	oc := tc.GetPrimaryServer().GetCluster().GetCoordinator().GetOperatorController()
 
 	conf := leaderServer.GetReplicationConfig().Clone()
diff --git a/tests/scheduling_cluster.go b/tests/scheduling_cluster.go
index 3f7c39eb81c..23a59d564b8 100644
--- a/tests/scheduling_cluster.go
+++ b/tests/scheduling_cluster.go
@@ -107,7 +107,7 @@ func (tc *TestSchedulingCluster) WaitForPrimaryServing(re *require.Assertions) *
 	var primary *scheduling.Server
 	testutil.Eventually(re, func() bool {
 		for _, server := range tc.servers {
-			if server.IsServing() {
+			if server.IsServing() && server.GetCoordinator().AreSchedulersInitialized() {
 				primary = server
 				return true
 			}
diff --git a/tests/server/api/api_test.go b/tests/server/api/api_test.go
index 37e727788dd..6d5fc1c0356 100644
--- a/tests/server/api/api_test.go
+++ b/tests/server/api/api_test.go
@@ -1159,11 +1159,12 @@ func TestDeleteAllRegionCacheScheduling(t *testing.T) {
 		count := rc.GetOperatorController().OperatorCount(operator.OpSplit)
 		return count > 0
 	})
-	rc.GetOperatorController().RemoveOperators()
+
 	// Call the delete API and verify
 	addr := leaderServer.GetAddr() + "/pd/api/v1/admin/cache/regions"
 	output := sendRequest(re, addr, http.MethodDelete, http.StatusOK)
 	re.Contains(string(output), "All regions are removed from server cache")
+	rc.GetOperatorController().RemoveOperators()
 	re.Equal(0, int(rc.GetOperatorController().OperatorCount(operator.OpSplit)))
 
 	// Simulate continuous heartbeat and verify scheduling recovery
diff --git a/tests/server/api/region_test.go b/tests/server/api/region_test.go
index 3a187629830..6467f39b0d7 100644
--- a/tests/server/api/region_test.go
+++ b/tests/server/api/region_test.go
@@ -42,10 +42,14 @@ func TestRegionTestSuite(t *testing.T) {
 }
 
 func (suite *regionTestSuite) SetupSuite() {
+	re := suite.Require()
+	re.NoError(failpoint.Enable("github.com/tikv/pd/pkg/schedule/checker/skipCheckSuspectRanges", "return(true)"))
 	suite.env = tests.NewSchedulingTestEnvironment(suite.T())
 }
 
 func (suite *regionTestSuite) TearDownSuite() {
+	re := suite.Require()
+	re.NoError(failpoint.Disable("github.com/tikv/pd/pkg/schedule/checker/skipCheckSuspectRanges"))
 	suite.env.Cleanup()
 }
 
@@ -138,10 +142,7 @@ func (suite *regionTestSuite) checkSplitRegions(cluster *tests.TestCluster) {
 }
 
 func (suite *regionTestSuite) TestAccelerateRegionsScheduleInRange() {
-	re := suite.Require()
-	re.NoError(failpoint.Enable("github.com/tikv/pd/pkg/schedule/checker/skipCheckSuspectRanges", "return(true)"))
 	suite.env.RunTestBasedOnMode(suite.checkAccelerateRegionsScheduleInRange)
-	re.NoError(failpoint.Disable("github.com/tikv/pd/pkg/schedule/checker/skipCheckSuspectRanges"))
 }
 
 func (suite *regionTestSuite) checkAccelerateRegionsScheduleInRange(cluster *tests.TestCluster) {
@@ -176,10 +177,7 @@ func (suite *regionTestSuite) checkAccelerateRegionsScheduleInRange(cluster *tes
 }
 
 func (suite *regionTestSuite) TestAccelerateRegionsScheduleInRanges() {
-	re := suite.Require()
-	re.NoError(failpoint.Enable("github.com/tikv/pd/pkg/schedule/checker/skipCheckSuspectRanges", "return(true)"))
 	suite.env.RunTestBasedOnMode(suite.checkAccelerateRegionsScheduleInRanges)
-	re.NoError(failpoint.Disable("github.com/tikv/pd/pkg/schedule/checker/skipCheckSuspectRanges"))
 }
 
 func (suite *regionTestSuite) checkAccelerateRegionsScheduleInRanges(cluster *tests.TestCluster) {