diff --git a/packages/codegen/test/print.test.ts b/packages/codegen/test/print.test.ts
index 5a271f3268..3de75ddab7 100644
--- a/packages/codegen/test/print.test.ts
+++ b/packages/codegen/test/print.test.ts
@@ -19,9 +19,11 @@ import type * as ESTree from "../../../npm/oxc-types/types.d.ts";
 
 // Parse options for the cases which give source rather than an AST.
 //
-// `preserveParens: false` because this printer deliberately does not support the redundant
-// `ParenthesizedExpression` node. `experimentalRawTransfer` is how the printer is meant to be used,
-// so the ASTs are the shape it really sees.
+// `preserveParens: false`, so every paren in the output is one the printer decided on itself.
+// The printer does support `ParenthesizedExpression` nodes - hand-built ASTs below test them,
+// and the fixture and conformance suites check both `preserveParens` modes against Rust.
+//
+// `experimentalRawTransfer` is how the printer is meant to be used, so the ASTs are the shape it really sees.
 //
 // `experimentalRawTransfer` is not in the published `ParserOptions` type - it is experimental and
 // untyped. Declaring the object here rather than inline at the call site keeps TypeScript's excess
diff --git a/packages/codegen/test/source-maps.test.ts b/packages/codegen/test/source-maps.test.ts
index bacde1b84e..3b97beac95 100644
--- a/packages/codegen/test/source-maps.test.ts
+++ b/packages/codegen/test/source-maps.test.ts
@@ -23,9 +23,11 @@ import type * as ESTree from "../../../npm/oxc-types/types.d.ts";
 // The inline fixtures below always run.
 const CACHE_DIR_PATH = pathJoin(import.meta.dirname, "../../../target");
 
-// `preserveParens: false` because this printer deliberately does not support the redundant
-// `ParenthesizedExpression` / `TSParenthesizedType` nodes. `experimentalRawTransfer` is how the
-// printer is meant to be used, so the ASTs here are the shape it really sees.
+// One `preserveParens` mode is enough for these checks, so `false`. The printer supports
+// `ParenthesizedExpression` / `TSParenthesizedType` nodes, and the fixture and conformance suites
+// check both modes against Rust.
+//
+// `experimentalRawTransfer` is how the printer is meant to be used, so the ASTs here are the shape it really sees.
 const PARSE_OPTIONS = {
   preserveParens: false,
   experimentalRawTransfer: true,