diff --git a/docs/website/content/docs/v0.3/Guides/bootstrapping.md b/docs/website/content/docs/v0.3/Guides/bootstrapping.md
index 0f9789bf6..a006c1db3 100644
--- a/docs/website/content/docs/v0.3/Guides/bootstrapping.md
+++ b/docs/website/content/docs/v0.3/Guides/bootstrapping.md
@@ -61,7 +61,7 @@ allow bootp;
 allow booting;
 
 next-server 192.168.1.150;
-filename "ipxe.efi";
+filename "ipxe.efi"; # use "undionly.kpxe" for BIOS netboot or "ipxe.efi" for UEFI netboot
 
 host talos-mgmt-0 {
     fixed-address 192.168.254.2;
diff --git a/sfyra/pkg/tests/environment.go b/sfyra/pkg/tests/environment.go
index 2fc0dc591..fe0cc9431 100644
--- a/sfyra/pkg/tests/environment.go
+++ b/sfyra/pkg/tests/environment.go
@@ -44,6 +44,7 @@ func TestEnvironmentDefault(ctx context.Context, metalClient client.Client, clus
 			cmdline.Append("talos.platform", "metal")
 			cmdline.Append("talos.shutdown", "halt")
 			cmdline.Append("talos.config", fmt.Sprintf("http://%s:9091/configdata?uuid=", cluster.SideroComponentsIP()))
+			cmdline.Append("initrd", "initramfs.xz")
 
 			environment.APIVersion = constants.SideroAPIVersion
 			environment.Name = environmentName