diff --git a/.testbed/labgrid/default.yaml b/.testbed/labgrid/default.yaml
index a4e91c8a72..97c7b1c303 100644
--- a/.testbed/labgrid/default.yaml
+++ b/.testbed/labgrid/default.yaml
@@ -131,7 +131,8 @@ targets:
           - setenv img_smd
           - setenv update_rescue_bank yes
           - mmc dev 0
-          - mmc erase 0x534022 0x40000
+          - mmc erase 0x534022 0x40000 # rootfs_data
+          - mmc erase 0x134022 0x400 # lcm_data
           - run update_prpl
         boot_command: run bootcmd
       UBootStrategy: {}
@@ -173,7 +174,8 @@ targets:
           - setenv img_smd
           - setenv update_rescue_bank yes
           - mmc dev 0
-          - mmc erase 0x86c00 0x10000
+          - mmc erase 0x86c00 0x10000 # rootfs_data
+          - mmc erase 0xa6c00 0x400 # lcm_data
           - run update_prpl
         boot_command: run bootcmd
       UBootStrategy: {}
diff --git a/.testbed/labgrid/testbed-02.yaml b/.testbed/labgrid/testbed-02.yaml
index 10977f704a..d625ba0b1b 100644
--- a/.testbed/labgrid/testbed-02.yaml
+++ b/.testbed/labgrid/testbed-02.yaml
@@ -165,7 +165,8 @@ targets:
           - setenv img_smd
           - setenv update_rescue_bank yes
           - mmc dev 0
-          - mmc erase 0x534022 0x40000
+          - mmc erase 0x534022 0x40000 # rootfs_data
+          - mmc erase 0x134022 0x400 # lcm_data
           - run update_prpl
         boot_command: run bootcmd
       UBootStrategy: {}
@@ -207,7 +208,8 @@ targets:
           - setenv img_smd
           - setenv update_rescue_bank yes
           - mmc dev 0
-          - mmc erase 0x86c00 0x10000
+          - mmc erase 0x86c00 0x10000 # rootfs_data
+          - mmc erase 0xa6c00 0x400 # lcm_data
           - run update_prpl
         boot_command: run bootcmd
       UBootStrategy: {}