diff --git a/mod_for_test_scripts/400installFio b/mod_for_test_scripts/400installFio
deleted file mode 100755
index dc365bf835..0000000000
--- a/mod_for_test_scripts/400installFio
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-
-# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Install fio and libaio1
-dpkg --install /modify_build/libaio1_*.deb
-dpkg --install /modify_build/fio_*.deb
-
diff --git a/mod_for_test_scripts/500installPatch b/mod_for_test_scripts/500installPatch
deleted file mode 100755
index 0a53019cae..0000000000
--- a/mod_for_test_scripts/500installPatch
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/bin/bash
-
-# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Install patch.
-dpkg --install /modify_build/patch_*.deb
-
diff --git a/mod_for_test_scripts/b100fio b/mod_for_test_scripts/b100fio
deleted file mode 100644
index 1627aa3c28..0000000000
--- a/mod_for_test_scripts/b100fio
+++ /dev/null
@@ -1,12 +0,0 @@
-# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# build fio
-pushd "${GCLIENT_ROOT}/src/third_party/fio"
-./make_pkg.sh
-popd
-
-sudo cp "${DEFAULT_BUILD_ROOT}"/x86/local_packages/fio_*.deb \
-    "${ROOT_FS_DIR}/modify_build/"
-
diff --git a/mod_for_test_scripts/b101libaio1 b/mod_for_test_scripts/b101libaio1
deleted file mode 100644
index ece2082d9e..0000000000
--- a/mod_for_test_scripts/b101libaio1
+++ /dev/null
@@ -1,7 +0,0 @@
-# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-sudo cp "${DEFAULT_IMG_MIRROR#*://}"/pool/main/liba/libaio/libaio1_*.deb \
-    "${ROOT_FS_DIR}/modify_build"
-
diff --git a/mod_for_test_scripts/b500patch b/mod_for_test_scripts/b500patch
deleted file mode 100644
index fcac54ce30..0000000000
--- a/mod_for_test_scripts/b500patch
+++ /dev/null
@@ -1,7 +0,0 @@
-# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-sudo cp "${DEFAULT_IMG_MIRROR#*://}"/pool/main/p/patch/patch_*.deb \
-    "${ROOT_FS_DIR}/modify_build"
-
diff --git a/mod_image_for_test.sh b/mod_image_for_test.sh
index 2aa1dd81a0..00c0993fe8 100755
--- a/mod_image_for_test.sh
+++ b/mod_image_for_test.sh
@@ -65,13 +65,6 @@ sudo mount "${LOOP_DEV}" "${ROOT_FS_DIR}"
 
 echo "Modifying image ${FLAGS_image} for test..."
 
-# Run build steps for modify for test
-sudo mkdir -p "${ROOT_FS_DIR}/modify_build"
-scripts_dir="${GCLIENT_ROOT}/src/scripts/mod_for_test_scripts"
-for script in "${scripts_dir}"/b[0-9][0-9][0-9]*[!$~]; do
-  . ${script}
-done
-
 MOD_SCRIPTS_ROOT="${GCLIENT_ROOT}/src/scripts/mod_for_test_scripts"
 sudo mkdir -p "${ROOT_FS_DIR}/modify_scripts"
 sudo mount --bind "${MOD_SCRIPTS_ROOT}" "${ROOT_FS_DIR}/modify_scripts"
@@ -81,7 +74,6 @@ sudo chroot "${ROOT_FS_DIR}" "/modify_scripts/test_setup.sh"
 
 sudo umount "${ROOT_FS_DIR}/modify_scripts"
 sudo rmdir "${ROOT_FS_DIR}/modify_scripts"
-sudo rm -rf "${ROOT_FS_DIR}/modify_build"
 
 cleanup
 trap - EXIT