diff --git a/gnupg2.spec b/gnupg2.spec
index 148a0ca..2e9b59e 100644
--- a/gnupg2.spec
+++ b/gnupg2.spec
@@ -58,6 +58,7 @@ BuildRequires: systemd-rpm-macros
 BuildRequires: tpm2-tss-devel
 # for tests
 BuildRequires: openssh-clients
+BuildRequires: swtpm
 
 Requires: libgcrypt >= 1.9.1
 Requires: libgpg-error >= 1.46