diff --git a/server/http/cmd_bit_test.go b/server/http/cmd_bit_test.go
index 5a13238..f5af288 100644
--- a/server/http/cmd_bit_test.go
+++ b/server/http/cmd_bit_test.go
@@ -14,7 +14,7 @@ func TestBgetCommand(t *testing.T) {
 
 	_, err := bgetCommand(db, "test_bget", "a", "b", "c")
 	if err == nil || err.Error() != "wrong number of arguments for 'bget' command" {
-		t.Fatal("invalid err %v", err)
+		t.Fatalf("invalid err %v", err)
 	}
 
 	r, err := bgetCommand(db, "test_bget")
@@ -23,7 +23,7 @@ func TestBgetCommand(t *testing.T) {
 	}
 	str := r.(string)
 	if str != "\x07" {
-		t.Fatal("wrong result of 'bget': %v", []byte(str))
+		t.Fatalf("wrong result of 'bget': %v", []byte(str))
 	}
 }
 
diff --git a/server/http/cmd_hash_test.go b/server/http/cmd_hash_test.go
index c95fde1..bbca2ed 100644
--- a/server/http/cmd_hash_test.go
+++ b/server/http/cmd_hash_test.go
@@ -73,7 +73,7 @@ func TestHExistsCommand(t *testing.T) {
 
 }
 
-func TestDelCommand(t *testing.T) {
+func TestHDelCommand(t *testing.T) {
 	db := getTestDB()
 	_, err := hdelCommand(db, "test_hdel")
 	if err == nil || err.Error() != fmt.Sprintf(ERR_ARGUMENT_FORMAT, "hdel") {
diff --git a/server/http/cmd_kv_test.go b/server/http/cmd_kv_test.go
index 0ff661e..b85de30 100644
--- a/server/http/cmd_kv_test.go
+++ b/server/http/cmd_kv_test.go
@@ -3,6 +3,7 @@ package http
 import (
 	"fmt"
 	"testing"
+	"time"
 )
 
 func TestGetCommand(t *testing.T) {
@@ -114,3 +115,147 @@ func TestIncrCommand(t *testing.T) {
 	}
 
 }
+
+func TestDecrCommand(t *testing.T) {
+	db := getTestDB()
+	_, err := decrCommand(db, "test_decr", "a")
+	if err == nil || err.Error() != fmt.Sprintf(ERR_ARGUMENT_FORMAT, "decr") {
+		t.Fatal("invalid err ", err)
+	}
+
+	v, err := decrCommand(db, "test_decr")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if v.(int64) != -1 {
+		t.Fatal("invalid result ", v)
+	}
+}
+
+func TestDelCommand(t *testing.T) {
+	db := getTestDB()
+	_, err := delCommand(db)
+	if err == nil || err.Error() != fmt.Sprintf(ERR_ARGUMENT_FORMAT, "del") {
+		t.Fatal("invalid err ", err)
+	}
+
+	v, err := delCommand(db, "test_del")
+
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if v.(int64) != 1 {
+		t.Fatal("invalid result ", v)
+	}
+}
+
+func TestMsetCommand(t *testing.T) {
+	db := getTestDB()
+	_, err := msetCommand(db, "a", "b", "c")
+	if err == nil || err.Error() != fmt.Sprintf(ERR_ARGUMENT_FORMAT, "mset") {
+		t.Fatal("invalid err ", err)
+	}
+
+	v, err := msetCommand(db, "test_mset", "v")
+
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	r := v.([]interface{})
+	if len(r) != 2 {
+		t.Fatal("invalid result ", v)
+	}
+	if r[0].(bool) != true {
+		t.Fatal("invalid result ", r[0])
+	}
+
+	if r[1].(string) != "OK" {
+		t.Fatal("invalid result ", r[1])
+	}
+}
+
+func TestMgetCommand(t *testing.T) {
+	db := getTestDB()
+	_, err := mgetCommand(db)
+	if err == nil || err.Error() != fmt.Sprintf(ERR_ARGUMENT_FORMAT, "mget") {
+		t.Fatal("invalid err ", err)
+	}
+
+	v, err := mgetCommand(db, "test_mget")
+
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	arr := v.([]interface{})
+	if arr[0] != nil {
+		t.Fatal("invalid result ", arr)
+	}
+}
+
+func TestExpireCommand(t *testing.T) {
+	db := getTestDB()
+	_, err := expireCommand(db)
+	if err == nil || err.Error() != fmt.Sprintf(ERR_ARGUMENT_FORMAT, "expire") {
+		t.Fatal("invalid err ", err)
+	}
+	v, err := expireCommand(db, "test_expire", "10")
+
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if v.(int64) != 0 {
+		t.Fatal("invalid result ", v)
+	}
+}
+
+func TestExpireAtCommand(t *testing.T) {
+	db := getTestDB()
+	_, err := expireAtCommand(db)
+	if err == nil || err.Error() != fmt.Sprintf(ERR_ARGUMENT_FORMAT, "expireat") {
+		t.Fatal("invalid err ", err)
+	}
+
+	expireAt := fmt.Sprintf("%d", time.Now().Unix()+10)
+	v, err := expireAtCommand(db, "test_expireat", expireAt)
+
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if v.(int64) != 0 {
+		t.Fatal("invalid result ", v)
+	}
+}
+
+func TestTTLCommand(t *testing.T) {
+	db := getTestDB()
+	_, err := ttlCommand(db)
+	if err == nil || err.Error() != fmt.Sprintf(ERR_ARGUMENT_FORMAT, "ttl") {
+		t.Fatal("invalid err ", err)
+	}
+
+	v, err := ttlCommand(db, "test_ttl")
+
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if v.(int64) != -1 {
+		t.Fatal("invalid result ", v)
+	}
+}
+
+func TestPersistCommand(t *testing.T) {
+	db := getTestDB()
+	_, err := persistCommand(db)
+	if err == nil || err.Error() != fmt.Sprintf(ERR_ARGUMENT_FORMAT, "persist") {
+		t.Fatal("invalid err ", err)
+	}
+
+	v, err := persistCommand(db, "test_persist")
+
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+	if v.(int64) != 0 {
+		t.Fatal("invalid result ", v)
+	}
+}