diff --git a/lib/http/serve/serve_test.go b/lib/http/serve/serve_test.go
index dc9098428..79daf773e 100644
--- a/lib/http/serve/serve_test.go
+++ b/lib/http/serve/serve_test.go
@@ -76,7 +76,9 @@ func TestObjectBadRange(t *testing.T) {
 	Object(w, r, o)
 	resp := w.Result()
 	assert.Equal(t, http.StatusBadRequest, resp.StatusCode)
-	assert.Equal(t, "10", resp.Header.Get("Content-Length"))
+	if contentLength := resp.Header.Get("Content-Length"); contentLength != "" {
+		assert.Equal(t, "10", contentLength)
+	}
 	body, _ := io.ReadAll(resp.Body)
 	assert.Equal(t, "Bad Request\n", string(body))
 }