diff --git a/tests/common/member_test.go b/tests/common/member_test.go
index 1efb95039a66..5a40fff53a11 100644
--- a/tests/common/member_test.go
+++ b/tests/common/member_test.go
@@ -34,6 +34,8 @@ func TestMemberList(t *testing.T) {
 
 	for _, tc := range clusterTestCases() {
 		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
 			ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 			defer cancel()
 			clus := testRunner.NewCluster(ctx, t, config.WithClusterConfig(tc.config))
@@ -113,6 +115,8 @@ func TestMemberAdd(t *testing.T) {
 		for _, quorumTc := range quorumTcs {
 			for _, clusterTc := range clusterTestCases() {
 				t.Run(learnerTc.name+"/"+quorumTc.name+"/"+clusterTc.name, func(t *testing.T) {
+					t.Parallel()
+
 					ctxTimeout := 10 * time.Second
 					if quorumTc.waitForQuorum {
 						ctxTimeout += etcdserver.HealthInterval
@@ -198,6 +202,8 @@ func TestMemberRemove(t *testing.T) {
 				continue
 			}
 			t.Run(quorumTc.name+"/"+clusterTc.name, func(t *testing.T) {
+				t.Parallel()
+
 				ctx, cancel := context.WithTimeout(context.Background(), 14*time.Second)
 				defer cancel()
 				c := clusterTc.config
diff --git a/tests/framework/e2e/e2e.go b/tests/framework/e2e/e2e.go
index f78df57926ea..9a245c3cf718 100644
--- a/tests/framework/e2e/e2e.go
+++ b/tests/framework/e2e/e2e.go
@@ -17,6 +17,7 @@ package e2e
 import (
 	"context"
 	"os"
+	"sync/atomic"
 	"testing"
 
 	"go.etcd.io/etcd/client/pkg/v3/testutil"
@@ -24,6 +25,8 @@ import (
 	intf "go.etcd.io/etcd/tests/v3/framework/interfaces"
 )
 
+var uniqueCount int32
+
 type e2eRunner struct{}
 
 func NewE2eRunner() intf.TestRunner {
@@ -83,6 +86,7 @@ func (e e2eRunner) NewCluster(ctx context.Context, t testing.TB, opts ...config.
 	default:
 		t.Fatalf("PeerTLS config %q not supported", cfg.PeerTLS)
 	}
+	e2eConfig.BasePort = 11000 + int(atomic.AddInt32(&uniqueCount, int32(cfg.ClusterSize+2)*5)%8000)
 	epc, err := NewEtcdProcessCluster(ctx, t, WithConfig(e2eConfig))
 	if err != nil {
 		t.Fatalf("could not start etcd integrationCluster: %s", err)
diff --git a/tests/framework/integration/cluster.go b/tests/framework/integration/cluster.go
index f78af573f348..8e117f47ecd1 100644
--- a/tests/framework/integration/cluster.go
+++ b/tests/framework/integration/cluster.go
@@ -260,13 +260,12 @@ func (c *Cluster) ProtoMembers() []*pb.Member {
 }
 
 func (c *Cluster) mustNewMember(t testutil.TB) *Member {
-	memberNumber := c.LastMemberNum
+	uniqueNumber := atomic.AddInt32(&UniqueNumber, 1)*10 + int32(c.LastMemberNum)
 	c.LastMemberNum++
 
 	m := MustNewMember(t,
 		MemberConfig{
-			Name:                        fmt.Sprintf("m%v", memberNumber),
-			MemberNumber:                memberNumber,
+			Name:                        fmt.Sprintf("m%v", uniqueNumber),
 			AuthToken:                   c.Cfg.AuthToken,
 			PeerTLS:                     c.Cfg.PeerTLS,
 			ClientTLS:                   c.Cfg.ClientTLS,
@@ -549,7 +548,6 @@ func NewListenerWithAddr(t testutil.TB, addr string) net.Listener {
 type Member struct {
 	config.ServerConfig
 	UniqNumber                     int
-	MemberNumber                   int
 	Port                           string
 	PeerListeners, ClientListeners []net.Listener
 	GRPCListener                   net.Listener
@@ -591,7 +589,6 @@ type Member struct {
 type MemberConfig struct {
 	Name                        string
 	UniqNumber                  int64
-	MemberNumber                int
 	PeerTLS                     *transport.TLSInfo
 	ClientTLS                   *transport.TLSInfo
 	AuthToken                   string
@@ -624,8 +621,7 @@ type MemberConfig struct {
 func MustNewMember(t testutil.TB, mcfg MemberConfig) *Member {
 	var err error
 	m := &Member{
-		MemberNumber: mcfg.MemberNumber,
-		UniqNumber:   int(atomic.AddInt32(&UniqueCount, 1)),
+		UniqNumber: int(atomic.AddInt32(&UniqueCount, 1)),
 	}
 
 	peerScheme := SchemeFromTLSInfo(mcfg.PeerTLS)