diff --git a/test/units/TEST-70-TPM2.cryptsetup.sh b/test/units/TEST-70-TPM2.cryptsetup.sh
index 0ecf34b6c86..cb7c8b1f313 100755
--- a/test/units/TEST-70-TPM2.cryptsetup.sh
+++ b/test/units/TEST-70-TPM2.cryptsetup.sh
@@ -212,7 +212,7 @@ Encrypt=tpm2
 EOF
     PASSWORD=passphrase systemd-repart --tpm2-device-key=/tmp/srk.pub --definitions=/tmp/dditest --empty=create --size=50M /tmp/dditest.raw --tpm2-pcrs=
     DEVICE="$(systemd-dissect --attach /tmp/dditest.raw)"
-    udevadm wait --settle --timeout=10 "$DEVICE"
+    udevadm wait --settle --timeout=10 "$DEVICE"p1
     systemd-cryptsetup attach dditest "$DEVICE"p1 - tpm2-device=auto,headless=yes
     mkdir /tmp/dditest.mnt
     mount -t ext4 /dev/mapper/dditest /tmp/dditest.mnt