diff --git a/internal/datagen/generator.go b/internal/datagen/generator.go
index 845d7fd..33b4180 100644
--- a/internal/datagen/generator.go
+++ b/internal/datagen/generator.go
@@ -84,7 +84,7 @@ func (g *Generator) fillBuffer() {
 		}
 		g.buf = b.Bytes()
 	default:
-		rand.Read(g.buf) // Per docs, err is always nil here
+		g.rand.Read(g.buf) // Per docs, err is always nil here
 	}
 }
 
diff --git a/internal/local/local.go b/internal/local/local.go
index 6e207d2..788061d 100644
--- a/internal/local/local.go
+++ b/internal/local/local.go
@@ -248,7 +248,7 @@ func storageEngineOptionsFromConfig(c *config.Config, debug bool, l Limiter) ([]
 
 	var shOpts [][]shard.Option
 
-	engineconfig.IterateShards(c, false, func(sc *shardconfig.Config) error {
+	err := engineconfig.IterateShards(c, false, func(sc *shardconfig.Config) error {
 		opts := []shard.Option{
 			shard.WithRefillMetabase(sc.RefillMetabase()),
 			shard.WithMode(sc.Mode()),
@@ -375,7 +375,9 @@ func storageEngineOptionsFromConfig(c *config.Config, debug bool, l Limiter) ([]
 
 		return nil
 	})
-
+	if err != nil {
+		return nil, nil, fmt.Errorf("iterate shards: %w", err)
+	}
 	return ngOpts, shOpts, nil
 }
 
diff --git a/internal/native/client.go b/internal/native/client.go
index 614886d..e6bc330 100644
--- a/internal/native/client.go
+++ b/internal/native/client.go
@@ -309,10 +309,9 @@ func (c *Client) PutContainer(params map[string]string) PutContainerResponse {
 	}
 
 	start := time.Now()
-	var prm client.PrmContainerPut
-	prm.SetContainer(cnr)
-
-	res, err := c.cli.ContainerPut(c.vu.Context(), prm)
+	res, err := c.cli.ContainerPut(c.vu.Context(), client.PrmContainerPut{
+		Container: &cnr,
+	})
 	if err != nil {
 		return c.putCnrErrorResponse(err)
 	}
@@ -500,10 +499,9 @@ func (x *waitParams) setDefaults() {
 
 func (c *Client) waitForContainerPresence(ctx context.Context, cnrID cid.ID, wp *waitParams) error {
 	return waitFor(ctx, wp, func(ctx context.Context) bool {
-		var prm client.PrmContainerGet
-		prm.SetContainer(cnrID)
-
-		_, err := c.cli.ContainerGet(ctx, prm)
+		_, err := c.cli.ContainerGet(ctx, client.PrmContainerGet{
+			ContainerID: &cnrID,
+		})
 		return err == nil
 	})
 }
diff --git a/internal/native/native.go b/internal/native/native.go
index 95a8e7d..ca02bbf 100644
--- a/internal/native/native.go
+++ b/internal/native/native.go
@@ -89,9 +89,9 @@ func (n *Native) Connect(endpoint, hexPrivateKey string, dialTimeout, streamTime
 
 	// generate session token
 	exp := uint64(math.MaxUint64)
-	var prmSessionCreate client.PrmSessionCreate
-	prmSessionCreate.SetExp(exp)
-	sessionResp, err := cli.SessionCreate(n.vu.Context(), prmSessionCreate)
+	sessionResp, err := cli.SessionCreate(n.vu.Context(), client.PrmSessionCreate{
+		Expiration: exp,
+	})
 	if err != nil {
 		return nil, fmt.Errorf("dial endpoint: %s %w", endpoint, err)
 	}
diff --git a/internal/s3local/local.go b/internal/s3local/local.go
index e760fe7..3da7435 100644
--- a/internal/s3local/local.go
+++ b/internal/s3local/local.go
@@ -151,7 +151,10 @@ func (s *Local) Connect(configFile string, configDir string, params map[string]s
 	}
 
 	l := layer.NewLayer(zap.L(), &frostfs{rc}, cfg)
-	l.Initialize(s.l.VU().Context(), nopEventListener{})
+	err = l.Initialize(s.l.VU().Context(), nopEventListener{})
+	if err != nil {
+		return nil, fmt.Errorf("initialize: %w", err)
+	}
 
 	return &Client{
 		vu:       s.l.VU(),