diff --git a/server/cluster/cluster_test.go b/server/cluster/cluster_test.go
index 9a9420988a1..fa1b14d107e 100644
--- a/server/cluster/cluster_test.go
+++ b/server/cluster/cluster_test.go
@@ -153,7 +153,9 @@ func TestStoreHeartbeat(t *testing.T) {
 		},
 		PeerStats: []*pdpb.PeerStat{},
 	}
-	cluster.opt.GetScheduleConfig().StoreLimitVersion = "v1"
+	scheCfg := cluster.opt.GetScheduleConfig().Clone()
+	scheCfg.StoreLimitVersion = "v1"
+	cluster.opt.SetScheduleConfig(scheCfg)
 	re.NoError(cluster.HandleStoreHeartbeat(hotReq, hotResp))
 	re.NoError(cluster.HandleStoreHeartbeat(hotReq, hotResp))
 	re.NoError(cluster.HandleStoreHeartbeat(hotReq, hotResp))
diff --git a/tests/integrations/mcs/scheduling/api_test.go b/tests/integrations/mcs/scheduling/api_test.go
index 6335d104e3e..326068c29b5 100644
--- a/tests/integrations/mcs/scheduling/api_test.go
+++ b/tests/integrations/mcs/scheduling/api_test.go
@@ -434,11 +434,15 @@ func (suite *apiTestSuite) checkConfigForward(cluster *tests.TestCluster) {
 
 	// Test to change config only in scheduling server
 	// Expect to get new config in scheduling server but not old config in api server
-	opts.GetScheduleConfig().LeaderScheduleLimit = 100
+	scheCfg := opts.GetScheduleConfig().Clone()
+	scheCfg.LeaderScheduleLimit = 100
+	opts.SetScheduleConfig(scheCfg)
 	re.Equal(100, int(opts.GetLeaderScheduleLimit()))
 	testutil.ReadGetJSON(re, tests.TestDialClient, urlPrefix, &cfg)
 	re.Equal(100., cfg["schedule"].(map[string]any)["leader-schedule-limit"])
-	opts.GetReplicationConfig().MaxReplicas = 5
+	repCfg := opts.GetReplicationConfig().Clone()
+	repCfg.MaxReplicas = 5
+	opts.SetReplicationConfig(repCfg)
 	re.Equal(5, int(opts.GetReplicationConfig().MaxReplicas))
 	testutil.ReadGetJSON(re, tests.TestDialClient, urlPrefix, &cfg)
 	re.Equal(5., cfg["replication"].(map[string]any)["max-replicas"])
diff --git a/tools/pd-ctl/tests/config/config_test.go b/tools/pd-ctl/tests/config/config_test.go
index d4b1e90ec1b..a430d1075ff 100644
--- a/tools/pd-ctl/tests/config/config_test.go
+++ b/tools/pd-ctl/tests/config/config_test.go
@@ -493,8 +493,12 @@ func (suite *configTestSuite) checkConfigForwardControl(cluster *pdTests.TestClu
 	// Test Config
 	// inject different config to scheduling server
 	if sche := cluster.GetSchedulingPrimaryServer(); sche != nil {
-		sche.GetPersistConfig().GetScheduleConfig().LeaderScheduleLimit = 233
-		sche.GetPersistConfig().GetReplicationConfig().MaxReplicas = 7
+		scheCfg := sche.GetPersistConfig().GetScheduleConfig().Clone()
+		scheCfg.LeaderScheduleLimit = 233
+		sche.GetPersistConfig().SetScheduleConfig(scheCfg)
+		repCfg := sche.GetPersistConfig().GetReplicationConfig().Clone()
+		repCfg.MaxReplicas = 7
+		sche.GetPersistConfig().SetReplicationConfig(repCfg)
 		re.Equal(uint64(233), sche.GetPersistConfig().GetLeaderScheduleLimit())
 		re.Equal(7, sche.GetPersistConfig().GetMaxReplicas())
 	}