diff --git a/support/testing/tests/fs/test_jffs2.py b/support/testing/tests/fs/test_jffs2.py
index f595e408d5..1806bd7e3c 100644
--- a/support/testing/tests/fs/test_jffs2.py
+++ b/support/testing/tests/fs/test_jffs2.py
@@ -16,7 +16,7 @@ class TestJffs2(infra.basetest.BRTest):
         """
         BR2_TARGET_ROOTFS_JFFS2=y
         BR2_TARGET_ROOTFS_JFFS2_CUSTOM=y
-        BR2_TARGET_ROOTFS_JFFS2_CUSTOM_EBSIZE=0x80000
+        BR2_TARGET_ROOTFS_JFFS2_CUSTOM_EBSIZE=0x40000
         BR2_TARGET_ROOTFS_JFFS2_NOCLEANMARKER=y
         BR2_TARGET_ROOTFS_JFFS2_PAD=y
         BR2_TARGET_ROOTFS_JFFS2_PADSIZE=0x4000000