diff --git a/tools/releasetools/apex_utils.py b/tools/releasetools/apex_utils.py
index 1c61938..afebc40 100644
--- a/tools/releasetools/apex_utils.py
+++ b/tools/releasetools/apex_utils.py
@@ -273,7 +273,7 @@
     else:
       payload_info[key] = value
 
-  # Sanity check.
+  # Validation check.
   for key in ('Algorithm', 'Salt', 'apex.key', 'Hash Algorithm'):
     if key not in payload_info:
       raise ApexInfoError(
diff --git a/tools/releasetools/blockimgdiff.py b/tools/releasetools/blockimgdiff.py
index 8b6a690..d33c2f7 100644
--- a/tools/releasetools/blockimgdiff.py
+++ b/tools/releasetools/blockimgdiff.py
@@ -521,7 +521,7 @@
         stashed_blocks -= free_size
 
       if common.OPTIONS.cache_size is not None:
-        # Sanity check: abort if we're going to need more stash space than
+        # Validation check: abort if we're going to need more stash space than
         # the allowed size (cache_size * threshold). There are two purposes
         # of having a threshold here. a) Part of the cache may have been
         # occupied by some recovery logs. b) It will buy us some time to deal
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 25ccea0..32864ab 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -1177,7 +1177,7 @@
   if args and args.strip():
     split_args = shlex.split(args)
     for index, arg in enumerate(split_args[:-1]):
-      # Sanity check that the image file exists. Some images might be defined
+      # Check that the image file exists. Some images might be defined
       # as a path relative to source tree, which may not be available at the
       # same location when running this script (we have the input target_files
       # zip only). For such cases, we additionally scan other locations (e.g.
diff --git a/tools/releasetools/ota_from_target_files.py b/tools/releasetools/ota_from_target_files.py
index c3dcf0d..b70044e 100755
--- a/tools/releasetools/ota_from_target_files.py
+++ b/tools/releasetools/ota_from_target_files.py
@@ -1940,7 +1940,7 @@
 
 def GenerateNonAbOtaPackage(target_file, output_file, source_file=None):
   """Generates a non-A/B OTA package."""
-  # Sanity check the loaded info dicts first.
+  # Check the loaded info dicts first.
   if OPTIONS.info_dict.get("no_recovery") == "true":
     raise common.ExternalError(
         "--- target build has specified no recovery ---")
diff --git a/tools/releasetools/sign_target_files_apks.py b/tools/releasetools/sign_target_files_apks.py
index 5d10c40..1cb9a4f 100755
--- a/tools/releasetools/sign_target_files_apks.py
+++ b/tools/releasetools/sign_target_files_apks.py
@@ -1116,7 +1116,7 @@
               privkey.endswith(privkey_suffix) and
               pubkey[:-pubkey_suffix_len] == privkey[:-privkey_suffix_len])
 
-    # Sanity check on the container key names, as we'll carry them without the
+    # Check the container key names, as we'll carry them without the
     # extensions. This doesn't apply to payload keys though, which we will use
     # full names only.
     container_cert = matches.group("CONTAINER_CERT")