diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index ac970d1..1d8090a 100755
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -194,11 +194,11 @@
   # AVB-sign the image as needed.
   if OPTIONS.info_dict.get("board_avb_enable") == "true":
     avbtool = os.getenv('AVBTOOL') or OPTIONS.info_dict["avb_avbtool"]
-    part_size = OPTIONS.info_dict.get("dtbo_size")
+    part_size = OPTIONS.info_dict["dtbo_size"]
     # The AVB hash footer will be replaced if already present.
     cmd = [avbtool, "add_hash_footer", "--image", img.name,
            "--partition_size", str(part_size), "--partition_name", "dtbo"]
-    common.AppendAVBSigningArgs(cmd)
+    cmd.extend(shlex.split(OPTIONS.info_dict["avb_signing_args"]))
     args = OPTIONS.info_dict.get("board_avb_dtbo_add_hash_footer_args")
     if args and args.strip():
       cmd.extend(shlex.split(args))
@@ -349,7 +349,7 @@
     cmd.extend(["--include_descriptors_from_image", dtbo_img_path])
   if OPTIONS.info_dict.get("system_root_image") == "true":
     cmd.extend(["--setup_rootfs_from_kernel", system_img_path])
-  common.AppendAVBSigningArgs(cmd)
+  cmd.extend(shlex.split(OPTIONS.info_dict["avb_signing_args"]))
   args = OPTIONS.info_dict.get("board_avb_make_vbmeta_image_args")
   if args and args.strip():
     cmd.extend(shlex.split(args))
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index c022d24..652fadf 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -345,16 +345,6 @@
     print("%-25s = (%s) %s" % (k, type(v).__name__, v))
 
 
-def AppendAVBSigningArgs(cmd):
-  """Append signing arguments for avbtool."""
-  keypath = OPTIONS.info_dict.get("board_avb_key_path", None)
-  algorithm = OPTIONS.info_dict.get("board_avb_algorithm", None)
-  if not keypath or not algorithm:
-    algorithm = "SHA256_RSA4096"
-    keypath = "external/avb/test/data/testkey_rsa4096.pem"
-  cmd.extend(["--key", keypath, "--algorithm", algorithm])
-
-
 def _BuildBootableImage(sourcedir, fs_config_file, info_dict=None,
                         has_ramdisk=False, two_step_image=False):
   """Build a bootable image from the specified sourcedir.
@@ -491,12 +481,12 @@
 
   # AVB: if enabled, calculate and add hash to boot.img.
   if info_dict.get("board_avb_enable", None) == "true":
-    avbtool = os.getenv('AVBTOOL') or OPTIONS.info_dict["avb_avbtool"]
-    part_size = info_dict.get("boot_size", None)
+    avbtool = os.getenv('AVBTOOL') or info_dict["avb_avbtool"]
+    part_size = info_dict["boot_size"]
     cmd = [avbtool, "add_hash_footer", "--image", img.name,
            "--partition_size", str(part_size), "--partition_name", "boot"]
-    AppendAVBSigningArgs(cmd)
-    args = info_dict.get("board_avb_boot_add_hash_footer_args", None)
+    cmd.extend(shlex.split(info_dict["avb_signing_args"]))
+    args = info_dict.get("board_avb_boot_add_hash_footer_args")
     if args and args.strip():
       cmd.extend(shlex.split(args))
     p = Run(cmd, stdout=subprocess.PIPE)