diff --git a/backend/error_source.go b/backend/error_source.go
index b75fd4bf6..ae92e9c63 100644
--- a/backend/error_source.go
+++ b/backend/error_source.go
@@ -13,8 +13,7 @@ const (
 // ErrorSourceFromStatus returns an ErrorSource based on provided HTTP status code.
 func ErrorSourceFromHTTPStatus(statusCode int) ErrorSource {
 	switch statusCode {
-	case http.StatusBadRequest,
-		http.StatusMethodNotAllowed,
+	case http.StatusMethodNotAllowed,
 		http.StatusNotAcceptable,
 		http.StatusPreconditionFailed,
 		http.StatusRequestEntityTooLarge,