diff --git a/src/content/docs/en/development/testing.mdx b/src/content/docs/en/development/testing.mdx
index 1168c4d..cf2293d 100644
--- a/src/content/docs/en/development/testing.mdx
+++ b/src/content/docs/en/development/testing.mdx
@@ -59,9 +59,22 @@ mount /dev/mapper/crypted /mnt
 ```
 </TabItem>
 </Tabs>
-Format and mount the boot partition:
+Format the boot partition:
+<Tabs>
+<TabItem label="EFI">
 ```shell
 mkfs.fat -F 32 -n BOOT /dev/sda1
+```
+</TabItem>
+<TabItem label="BIOS/Legacy">
+```shell
+mkfs.ext4 /dev/sda1
+```
+</TabItem>
+</Tabs>
+
+and mount it:
+```shell
 mount --mkdir /dev/sda1 /mnt/boot
 ```
 Format the swap partition
@@ -173,4 +186,4 @@ Finally, run the Athena Nix installation:
 ```shell
 nix-shell -p nixos-install-tools --run "nixos-install --no-root-password --cores 2 --max-jobs 16 --keep-going"
 ```
-<ImageComponent />
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+<ImageComponent />