diff --git a/runtime/test/snapshots.md b/runtime/test/snapshots.md
index 37c5f7fb9..62156a5e0 100644
--- a/runtime/test/snapshots.md
+++ b/runtime/test/snapshots.md
@@ -1,5 +1,5 @@
 ---
-last_modified: 2026-06-25
+last_modified: 2026-09-16
 title: "Snapshot testing"
 description: "Capture program output as reference snapshots with Deno's built-in test runner, compare against them on every run, and update them with deno test --update-snapshots."
 oldUrl:
@@ -151,8 +151,8 @@ The most useful options:
 - `dir` and `path`: control where the snapshot file is written, resolved
   relative to the test file. A custom location requires read and write
   permission.
-- `mode`: force `"assert"` or `"update"` behavior for a single call, regardless
-  of the `--update-snapshots` flag.
+- `msg`: Failure message to use when the assertion fails, instead of the
+  generated diff message.
 
 Classes can customize their own serialization by implementing
 `Symbol.for("Deno.customInspect")`, since the default serializer is built on