diff --git a/fcm.go b/fcm.go
index 0d53062..230d389 100644
--- a/fcm.go
+++ b/fcm.go
@@ -211,7 +211,7 @@ func (c *Client) doSendRequest(ctx context.Context, req SendRequest, loggerEnabl
 	)
 
 	if response.StatusCode != http.StatusOK {
-		err := errors.Errorf("Status is not OK. Status: %d. Body: %s", response.StatusCode, bodyStr)
+		err := errors.Errorf("Status is not OK. Status: %d. Body: %q.", response.StatusCode, bodyStr)
 		span.SetStatus(codes.Error, err.Error())
 		span.RecordError(err)
 		return SendResponse{}, err
@@ -219,7 +219,7 @@ func (c *Client) doSendRequest(ctx context.Context, req SendRequest, loggerEnabl
 
 	var resp SendResponse
 	if err := json.Unmarshal(body, &resp); err != nil {
-		newErr := errors.Errorf("Can not parse send response as JSON. Response: %q. Error: %v", string(body), err)
+		newErr := errors.Errorf("Can not parse send response as JSON. Response: %q. Error: %v", bodyStr, err)
 		span.SetStatus(codes.Error, err.Error())
 		span.RecordError(err)
 		return SendResponse{}, newErr