diff --git a/pvmfw/testdata/test_crosvm_dt_base.dtsi b/pvmfw/testdata/test_crosvm_dt_base.dtsi
index 0c1a311..10d7e6d 100644
--- a/pvmfw/testdata/test_crosvm_dt_base.dtsi
+++ b/pvmfw/testdata/test_crosvm_dt_base.dtsi
@@ -1,5 +1,4 @@
 /dts-v1/;
-/plugin/;
 
 // This is generated manually by removing unassigned pvIOMMU nodes
 // from patched platform.dts.
diff --git a/pvmfw/testdata/test_pvmfw_devices_vm_dtbo_without_symbols.dts b/pvmfw/testdata/test_pvmfw_devices_vm_dtbo_without_symbols.dts
index 20a8c1b..495a0eb 100644
--- a/pvmfw/testdata/test_pvmfw_devices_vm_dtbo_without_symbols.dts
+++ b/pvmfw/testdata/test_pvmfw_devices_vm_dtbo_without_symbols.dts
@@ -1,4 +1,5 @@
 /dts-v1/;
+// /plugin/ omitted as this DTBO has been written by hand as a DTB in this DTS.
 
 / {
     host {
diff --git a/pvmfw/testdata/test_pvmfw_devices_with_duplicated_pviommus.dts b/pvmfw/testdata/test_pvmfw_devices_with_duplicated_pviommus.dts
index 4ebf034..5646c7f 100644
--- a/pvmfw/testdata/test_pvmfw_devices_with_duplicated_pviommus.dts
+++ b/pvmfw/testdata/test_pvmfw_devices_with_duplicated_pviommus.dts
@@ -1,5 +1,4 @@
 /dts-v1/;
-/plugin/;
 
 /include/ "test_crosvm_dt_base.dtsi"
 
diff --git a/pvmfw/testdata/test_pvmfw_devices_with_iommu_id_conflict.dts b/pvmfw/testdata/test_pvmfw_devices_with_iommu_id_conflict.dts
index a9e30be..04052fa 100644
--- a/pvmfw/testdata/test_pvmfw_devices_with_iommu_id_conflict.dts
+++ b/pvmfw/testdata/test_pvmfw_devices_with_iommu_id_conflict.dts
@@ -1,5 +1,4 @@
 /dts-v1/;
-/plugin/;
 
 /include/ "test_crosvm_dt_base.dtsi"
 
diff --git a/pvmfw/testdata/test_pvmfw_devices_with_iommu_sharing.dts b/pvmfw/testdata/test_pvmfw_devices_with_iommu_sharing.dts
index 2470725..32e5610 100644
--- a/pvmfw/testdata/test_pvmfw_devices_with_iommu_sharing.dts
+++ b/pvmfw/testdata/test_pvmfw_devices_with_iommu_sharing.dts
@@ -1,5 +1,4 @@
 /dts-v1/;
-/plugin/;
 
 /include/ "test_crosvm_dt_base.dtsi"
 
diff --git a/pvmfw/testdata/test_pvmfw_devices_with_multiple_devices_iommus.dts b/pvmfw/testdata/test_pvmfw_devices_with_multiple_devices_iommus.dts
index 3aaafdd..3698c1d 100644
--- a/pvmfw/testdata/test_pvmfw_devices_with_multiple_devices_iommus.dts
+++ b/pvmfw/testdata/test_pvmfw_devices_with_multiple_devices_iommus.dts
@@ -1,5 +1,4 @@
 /dts-v1/;
-/plugin/;
 
 /include/ "test_crosvm_dt_base.dtsi"
 / {
diff --git a/pvmfw/testdata/test_pvmfw_devices_with_multiple_reg_iommus.dts b/pvmfw/testdata/test_pvmfw_devices_with_multiple_reg_iommus.dts
index 0676aa3..94fe18e 100644
--- a/pvmfw/testdata/test_pvmfw_devices_with_multiple_reg_iommus.dts
+++ b/pvmfw/testdata/test_pvmfw_devices_with_multiple_reg_iommus.dts
@@ -1,5 +1,4 @@
 /dts-v1/;
-/plugin/;
 
 /include/ "test_crosvm_dt_base.dtsi"
 
diff --git a/pvmfw/testdata/test_pvmfw_devices_with_rng.dts b/pvmfw/testdata/test_pvmfw_devices_with_rng.dts
index a987098..429771c 100644
--- a/pvmfw/testdata/test_pvmfw_devices_with_rng.dts
+++ b/pvmfw/testdata/test_pvmfw_devices_with_rng.dts
@@ -1,5 +1,4 @@
 /dts-v1/;
-/plugin/;
 
 /include/ "test_crosvm_dt_base.dtsi"
 
diff --git a/pvmfw/testdata/test_pvmfw_devices_without_device.dts b/pvmfw/testdata/test_pvmfw_devices_without_device.dts
index ee0be3a..05daaa7 100644
--- a/pvmfw/testdata/test_pvmfw_devices_without_device.dts
+++ b/pvmfw/testdata/test_pvmfw_devices_without_device.dts
@@ -1,5 +1,4 @@
 /dts-v1/;
-/plugin/;
 
 /include/ "test_crosvm_dt_base.dtsi"
 
diff --git a/pvmfw/testdata/test_pvmfw_devices_without_iommus.dts b/pvmfw/testdata/test_pvmfw_devices_without_iommus.dts
index 1a12c87..96fb073 100644
--- a/pvmfw/testdata/test_pvmfw_devices_without_iommus.dts
+++ b/pvmfw/testdata/test_pvmfw_devices_without_iommus.dts
@@ -1,5 +1,4 @@
 /dts-v1/;
-/plugin/;
 
 /include/ "test_crosvm_dt_base.dtsi"