diff --git a/support/testing/tests/fs/test_ubi.py b/support/testing/tests/fs/test_ubi.py
index eeb55b1d59..7c687c1982 100644
--- a/support/testing/tests/fs/test_ubi.py
+++ b/support/testing/tests/fs/test_ubi.py
@@ -8,10 +8,10 @@ class TestUbi(infra.basetest.BRTest):
     config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
         """
         BR2_TARGET_ROOTFS_UBIFS=y
-        BR2_TARGET_ROOTFS_UBIFS_LEBSIZE=0x7ff80
+        BR2_TARGET_ROOTFS_UBIFS_LEBSIZE=0x3ff80
         BR2_TARGET_ROOTFS_UBIFS_MINIOSIZE=0x1
         BR2_TARGET_ROOTFS_UBI=y
-        BR2_TARGET_ROOTFS_UBI_PEBSIZE=0x80000
+        BR2_TARGET_ROOTFS_UBI_PEBSIZE=0x40000
         BR2_TARGET_ROOTFS_UBI_SUBSIZE=1
         """