diff --git a/systemd.spec b/systemd.spec
index 688746b..aaf0917 100644
--- a/systemd.spec
+++ b/systemd.spec
@@ -164,6 +164,7 @@ BuildRequires:  python3dist(lxml)
 BuildRequires:  python3dist(pefile)
 BuildRequires:  python3dist(pillow)
 BuildRequires:  python3dist(pytest)
+BuildRequires:  python3dist(pytest-flakes)
 BuildRequires:  python3dist(zstd)
 # gzip and lzma are provided by the stdlib
 BuildRequires:  firewalld-filesystem