diff --git a/internal/db/dbclient_test.go b/internal/db/dbclient_test.go
index 78a128e9..4f383a02 100644
--- a/internal/db/dbclient_test.go
+++ b/internal/db/dbclient_test.go
@@ -5,20 +5,21 @@ package db_test
 import (
 	"context"
 	"fmt"
+	"log"
+	"os"
+	"testing"
+	"time"
+
 	"github.com/babylonlabs-io/babylon-staking-indexer/internal/config"
 	"github.com/babylonlabs-io/babylon-staking-indexer/internal/db"
 	"github.com/babylonlabs-io/babylon-staking-indexer/internal/db/model"
-	"github.com/babylonlabs-io/babylon-staking-indexer/internal/utils"
+	"github.com/babylonlabs-io/babylon-staking-indexer/testutil"
 	"github.com/ory/dockertest/v3"
 	"github.com/ory/dockertest/v3/docker"
 	"github.com/stretchr/testify/require"
 	"go.mongodb.org/mongo-driver/bson"
 	"go.mongodb.org/mongo-driver/mongo"
 	"go.mongodb.org/mongo-driver/mongo/options"
-	"log"
-	"os"
-	"testing"
-	"time"
 )
 
 const (
@@ -81,7 +82,7 @@ func setupMongoContainer() (*config.DbConfig, func(), error) {
 
 	// there can be only 1 container with the same name, so we add
 	// random string in the end in case there is still old container running
-	containerName := "mongo-integration-tests-db-" + utils.RandomAlphaNum(3)
+	containerName := "mongo-integration-tests-db-" + testutil.RandomAlphaNum(3)
 	resource, err := pool.RunWithOptions(&dockertest.RunOptions{
 		Name:       containerName,
 		Repository: "mongo",
diff --git a/internal/db/timelock_test.go b/internal/db/timelock_test.go
index 1aee8d2d..3ad8dff1 100644
--- a/internal/db/timelock_test.go
+++ b/internal/db/timelock_test.go
@@ -4,13 +4,14 @@ package db_test
 
 import (
 	"context"
+	"math"
+	"testing"
+
 	"github.com/babylonlabs-io/babylon-staking-indexer/internal/db/model"
 	"github.com/babylonlabs-io/babylon-staking-indexer/internal/types"
-	"github.com/babylonlabs-io/babylon-staking-indexer/internal/utils"
+	"github.com/babylonlabs-io/babylon-staking-indexer/testutil"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
-	"math"
-	"testing"
 )
 
 func TestTimeLock(t *testing.T) {
@@ -25,17 +26,17 @@ func TestTimeLock(t *testing.T) {
 	})
 	t.Run("find documents", func(t *testing.T) {
 		expiredDelegation1 := model.TimeLockDocument{
-			StakingTxHashHex:   utils.RandomAlphaNum(10),
+			StakingTxHashHex:   testutil.RandomAlphaNum(10),
 			ExpireHeight:       1,
 			DelegationSubState: types.SubStateTimelock,
 		}
 		expiredDelegation2 := model.TimeLockDocument{
-			StakingTxHashHex:   utils.RandomAlphaNum(10),
+			StakingTxHashHex:   testutil.RandomAlphaNum(10),
 			ExpireHeight:       5,
 			DelegationSubState: types.SubStateTimelock,
 		}
 		nonExpiredDelegation := model.TimeLockDocument{
-			StakingTxHashHex:   utils.RandomAlphaNum(10),
+			StakingTxHashHex:   testutil.RandomAlphaNum(10),
 			ExpireHeight:       10,
 			DelegationSubState: types.SubStateTimelock,
 		}
diff --git a/internal/utils/rand_test.go b/internal/utils/rand_test.go
deleted file mode 100644
index 4bc472fd..00000000
--- a/internal/utils/rand_test.go
+++ /dev/null
@@ -1,21 +0,0 @@
-package utils
-
-import (
-	"testing"
-	"github.com/stretchr/testify/assert"
-)
-
-func TestRandomAlphaNum(t *testing.T) {
-	// negative case
-	str := RandomAlphaNum(-1)
-	assert.Empty(t, str)
-
-	// zero length
-	str = RandomAlphaNum(0)
-	assert.Empty(t, str)
-
-	// usual case
-	length := 9
-	str = RandomAlphaNum(length)
-	assert.Len(t, str, length)
-}
diff --git a/internal/utils/rand.go b/testutil/rand.go
similarity index 96%
rename from internal/utils/rand.go
rename to testutil/rand.go
index f07118d3..881fff4e 100644
--- a/internal/utils/rand.go
+++ b/testutil/rand.go
@@ -1,4 +1,4 @@
-package utils
+package testutil
 
 import (
 	"math/rand"