diff --git a/nixos/tests/installer.nix b/nixos/tests/installer.nix
index 0b0e53ee7324..7b949ff93be7 100644
--- a/nixos/tests/installer.nix
+++ b/nixos/tests/installer.nix
@@ -403,8 +403,6 @@ in {
               "mkdir /mnt/boot",
               "mount LABEL=boot /mnt/boot",
               "udevadm settle",
-              "mdadm --verbose -W /dev/md0", # wait for sync to finish; booting off an unsynced device tends to fail
-              "mdadm --verbose -W /dev/md1",
           );
         '';
       preBootCommands = ''