diff --git a/pkg/local_object_storage/blobovnicza/blobovnicza_test.go b/pkg/local_object_storage/blobovnicza/blobovnicza_test.go
index c603479c..923933d5 100644
--- a/pkg/local_object_storage/blobovnicza/blobovnicza_test.go
+++ b/pkg/local_object_storage/blobovnicza/blobovnicza_test.go
@@ -1,8 +1,8 @@
 package blobovnicza
 
 import (
-	"crypto/rand"
 	"crypto/sha256"
+	"math/rand"
 	"os"
 	"testing"
 
@@ -70,6 +70,8 @@ func testGet(t *testing.T, blz *Blobovnicza, addr *objectSDK.Address, expObj []b
 }
 
 func TestBlobovnicza(t *testing.T) {
+	rand.Seed(1024)
+
 	p := "./test_blz"
 
 	sizeLim := uint64(256 * 1 << 10) // 256KB
diff --git a/pkg/local_object_storage/blobstor/blobovnicza_test.go b/pkg/local_object_storage/blobstor/blobovnicza_test.go
index d1cf3aaa..833d7242 100644
--- a/pkg/local_object_storage/blobstor/blobovnicza_test.go
+++ b/pkg/local_object_storage/blobstor/blobovnicza_test.go
@@ -1,9 +1,9 @@
 package blobstor
 
 import (
-	"crypto/rand"
 	"crypto/sha256"
 	"errors"
+	"math/rand"
 	"os"
 	"testing"
 
@@ -55,6 +55,8 @@ func testObject(sz uint64) *object.Object {
 }
 
 func TestBlobovniczas(t *testing.T) {
+	rand.Seed(1024)
+
 	l := test.NewLogger(false)
 	p := "./test_blz"
 
diff --git a/pkg/local_object_storage/metabase/db_test.go b/pkg/local_object_storage/metabase/db_test.go
index 6a2f3a63..d996cbab 100644
--- a/pkg/local_object_storage/metabase/db_test.go
+++ b/pkg/local_object_storage/metabase/db_test.go
@@ -1,8 +1,8 @@
 package meta_test
 
 import (
-	"crypto/rand"
 	"crypto/sha256"
+	"math/rand"
 	"os"
 	"testing"
 
diff --git a/pkg/local_object_storage/shard/shard_test.go b/pkg/local_object_storage/shard/shard_test.go
index 0d243bc3..5e2465f8 100644
--- a/pkg/local_object_storage/shard/shard_test.go
+++ b/pkg/local_object_storage/shard/shard_test.go
@@ -1,8 +1,8 @@
 package shard_test
 
 import (
-	"crypto/rand"
 	"crypto/sha256"
+	"math/rand"
 	"os"
 	"path"
 	"testing"