diff --git a/scripts/update_lit_checks.py b/scripts/update_lit_checks.py
index b6bb213a8f7..753b967ca41 100755
--- a/scripts/update_lit_checks.py
+++ b/scripts/update_lit_checks.py
@@ -30,8 +30,8 @@
 script_dir = os.path.dirname(__file__)
 script_name = os.path.basename(__file__)
 
-NOTICE = (';; NOTE: Assertions have been generated by {script} and should not' +
-          ' be edited.')
+NOTICE_PREFIX = f';; NOTE: Assertions have been generated by {script_name}'
+NOTICE = NOTICE_PREFIX + '{args} and should not be edited.'
 
 RUN_LINE_RE = re.compile(r'^\s*;;\s*RUN:\s*(.*)$')
 CHECK_PREFIX_RE = re.compile(r'.*--check-prefix[= ](\S+).*')
@@ -80,7 +80,7 @@ def itertests(args):
             with open(test) as f:
                 lines = [line.rstrip() for line in f]
             first_line = lines[0] if lines else ''
-            if script_name not in first_line and not args.force:
+            if NOTICE_PREFIX not in first_line and not args.force:
                 warn(f'Skipping test {test} which was not generated by '
                      f'{script_name}. Use -f to override.')
                 continue
@@ -258,12 +258,12 @@ def update_test(args, test, lines, tmp):
             _, kind, name = indentKindName(match)
             named_items.append((kind, name))
 
-    script = script_name
+    notice_args = ''
     if all_items:
-        script += ' --all-items'
+        notice_args += ' --all-items'
     if output_kind != 'wat':
-        script += f' --output={output_kind}'
-    output_lines = [NOTICE.format(script=script)]
+        notice_args += f' --output={output_kind}'
+    output_lines = [NOTICE.format(args=notice_args)]
 
     def emit_checks(indent, prefix, lines):
         def pad(line):
diff --git a/test/lit/passes/memory-copy-fill-lowering.wast b/test/lit/passes/memory-copy-fill-lowering.wast
index ea5198f893a..990c2fa30de 100644
--- a/test/lit/passes/memory-copy-fill-lowering.wast
+++ b/test/lit/passes/memory-copy-fill-lowering.wast
@@ -1,5 +1,5 @@
-;; NOTE: These assertions have been manually generated, and cannot be updated by update_lit_checks.py
-;; because of the assertion at the end (update_lit_checks.py ignores the features section because it's
+;; NOTE: These assertions have been manually generated because of the assertion
+;; at the end (update_lit_checks.py ignores the features section because it's
 ;; not semantically part of the module.)
 
 ;; RUN: wasm-opt --enable-bulk-memory %s --llvm-memory-copy-fill-lowering --emit-target-features -S -o - | filecheck %s