diff --git a/app/vmalert/remotewrite/remotewrite.go b/app/vmalert/remotewrite/remotewrite.go
index caff50a5c..c51be5168 100644
--- a/app/vmalert/remotewrite/remotewrite.go
+++ b/app/vmalert/remotewrite/remotewrite.go
@@ -226,14 +226,14 @@ func (c *Client) send(ctx context.Context, data []byte) error {
 	r := bytes.NewReader(data)
 	req, err := http.NewRequest("POST", c.addr, r)
 	if err != nil {
-		return fmt.Errorf("failed to create new HTTP request: %s", err)
+		return fmt.Errorf("failed to create new HTTP request: %w", err)
 	}
 	if c.baPass != "" {
 		req.SetBasicAuth(c.baUser, c.baPass)
 	}
 	resp, err := c.c.Do(req.WithContext(ctx))
 	if err != nil {
-		return fmt.Errorf("error while sending request to %s: %s; Data len %d(%d)",
+		return fmt.Errorf("error while sending request to %s: %w; Data len %d(%d)",
 			req.URL, err, len(data), r.Size())
 	}
 	defer func() { _ = resp.Body.Close() }()
diff --git a/app/vmalert/remotewrite/remotewrite_test.go b/app/vmalert/remotewrite/remotewrite_test.go
index 7dab24712..18a9cfff6 100644
--- a/app/vmalert/remotewrite/remotewrite_test.go
+++ b/app/vmalert/remotewrite/remotewrite_test.go
@@ -82,19 +82,19 @@ func (rw *rwServer) handler(w http.ResponseWriter, r *http.Request) {
 	}
 	data, err := ioutil.ReadAll(r.Body)
 	if err != nil {
-		rw.err(w, fmt.Errorf("body read err: %s", err))
+		rw.err(w, fmt.Errorf("body read err: %w", err))
 		return
 	}
 	defer func() { _ = r.Body.Close() }()
 
 	b, err := snappy.Decode(nil, data)
 	if err != nil {
-		rw.err(w, fmt.Errorf("decode err: %s", err))
+		rw.err(w, fmt.Errorf("decode err: %w", err))
 		return
 	}
 	wr := &prompb.WriteRequest{}
 	if err := wr.Unmarshal(b); err != nil {
-		rw.err(w, fmt.Errorf("unmarhsal err: %s", err))
+		rw.err(w, fmt.Errorf("unmarhsal err: %w", err))
 		return
 	}
 	atomic.AddUint64(&rw.acceptedRows, uint64(len(wr.Timeseries)))