diff --git a/.github/workflows/on-pull-request.yml b/.github/workflows/on-pull-request.yml
index acb63af..49d61a2 100644
--- a/.github/workflows/on-pull-request.yml
+++ b/.github/workflows/on-pull-request.yml
@@ -39,6 +39,11 @@ jobs:
             - name: Checkout sources
               uses: actions/checkout@v3
 
+            - name: Setup Node.js
+              uses: actions/setup-node@v4
+              with:
+                  node-version: '20'
+
             - name: Install toolchain
               uses: actions-rs/toolchain@v1
               with:
diff --git a/tests-e2e/reference_output/test1/test1.d.ts b/tests-e2e/reference_output/test1/test1.d.ts
index 7ac75a5..ec8a238 100644
--- a/tests-e2e/reference_output/test1/test1.d.ts
+++ b/tests-e2e/reference_output/test1/test1.d.ts
@@ -1,8 +1,8 @@
 /* tslint:disable */
 /* eslint-disable */
 /**
-* @returns {Point}
-*/
+ * @returns {Point}
+ */
 export function into_js(): Point;
 export interface Point {
     x: number;
diff --git a/tests-e2e/reference_output/test2/test2.d.ts b/tests-e2e/reference_output/test2/test2.d.ts
index 4c996b0..196cd91 100644
--- a/tests-e2e/reference_output/test2/test2.d.ts
+++ b/tests-e2e/reference_output/test2/test2.d.ts
@@ -1,8 +1,8 @@
 /* tslint:disable */
 /* eslint-disable */
 /**
-* @returns {Point}
-*/
+ * @returns {Point}
+ */
 export function into_js(): Point;
 export interface Point {
     x: number;
diff --git a/tests-e2e/reference_output/test4/test4.d.ts b/tests-e2e/reference_output/test4/test4.d.ts
index c7675da..eee62c2 100644
--- a/tests-e2e/reference_output/test4/test4.d.ts
+++ b/tests-e2e/reference_output/test4/test4.d.ts
@@ -1,20 +1,20 @@
 /* tslint:disable */
 /* eslint-disable */
 /**
-* @param {Point} point
-*/
+ * @param {Point} point
+ */
 export function consume(point: Point): void;
 /**
-* @returns {Point}
-*/
+ * @returns {Point}
+ */
 export function into_js(): Point;
 /**
-* @param {(Point)[]} points
-*/
+ * @param {(Point)[]} points
+ */
 export function consume_vector(points: (Point)[]): void;
 /**
-* @returns {(Point)[]}
-*/
+ * @returns {(Point)[]}
+ */
 export function vector_into_js(): (Point)[];
 export interface Point {
     x: number;
diff --git a/tests/expand/borrow.expanded.rs b/tests/expand/borrow.expanded.rs
index ca1a6a6..7d180c2 100644
--- a/tests/expand/borrow.expanded.rs
+++ b/tests/expand/borrow.expanded.rs
@@ -58,7 +58,7 @@ const _: () = {
                 Ok(js) => js.into_abi(),
                 Err(err) => {
                     let loc = core::panic::Location::caller();
-                    let msg = {
+                    let msg = ::alloc::__export::must_use({
                         let res = ::alloc::fmt::format(
                             format_args!(
                                 "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -66,7 +66,7 @@ const _: () = {
                             ),
                         );
                         res
-                    };
+                    });
                     {
                         #[cold]
                         #[track_caller]
@@ -105,7 +105,7 @@ const _: () = {
                 Ok(js) => js.into(),
                 Err(err) => {
                     let loc = core::panic::Location::caller();
-                    let msg = {
+                    let msg = ::alloc::__export::must_use({
                         let res = ::alloc::fmt::format(
                             format_args!(
                                 "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -113,7 +113,7 @@ const _: () = {
                             ),
                         );
                         res
-                    };
+                    });
                     {
                         #[cold]
                         #[track_caller]
@@ -145,7 +145,7 @@ const _: () = {
                     Ok(js) => js.into(),
                     Err(err) => {
                         let loc = core::panic::Location::caller();
-                        let msg = {
+                        let msg = ::alloc::__export::must_use({
                             let res = ::alloc::fmt::format(
                                 format_args!(
                                     "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -153,7 +153,7 @@ const _: () = {
                                 ),
                             );
                             res
-                        };
+                        });
                         {
                             #[cold]
                             #[track_caller]
diff --git a/tests/expand/generic_enum.expanded.rs b/tests/expand/generic_enum.expanded.rs
index 7aa7782..ec7e73b 100644
--- a/tests/expand/generic_enum.expanded.rs
+++ b/tests/expand/generic_enum.expanded.rs
@@ -59,7 +59,7 @@ const _: () = {
                 Ok(js) => js.into_abi(),
                 Err(err) => {
                     let loc = core::panic::Location::caller();
-                    let msg = {
+                    let msg = ::alloc::__export::must_use({
                         let res = ::alloc::fmt::format(
                             format_args!(
                                 "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -67,7 +67,7 @@ const _: () = {
                             ),
                         );
                         res
-                    };
+                    });
                     {
                         #[cold]
                         #[track_caller]
@@ -106,7 +106,7 @@ const _: () = {
                 Ok(js) => js.into(),
                 Err(err) => {
                     let loc = core::panic::Location::caller();
-                    let msg = {
+                    let msg = ::alloc::__export::must_use({
                         let res = ::alloc::fmt::format(
                             format_args!(
                                 "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -114,7 +114,7 @@ const _: () = {
                             ),
                         );
                         res
-                    };
+                    });
                     {
                         #[cold]
                         #[track_caller]
@@ -146,7 +146,7 @@ const _: () = {
                     Ok(js) => js.into(),
                     Err(err) => {
                         let loc = core::panic::Location::caller();
-                        let msg = {
+                        let msg = ::alloc::__export::must_use({
                             let res = ::alloc::fmt::format(
                                 format_args!(
                                     "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -154,7 +154,7 @@ const _: () = {
                                 ),
                             );
                             res
-                        };
+                        });
                         {
                             #[cold]
                             #[track_caller]
diff --git a/tests/expand/generic_struct.expanded.rs b/tests/expand/generic_struct.expanded.rs
index 467628c..1b546b8 100644
--- a/tests/expand/generic_struct.expanded.rs
+++ b/tests/expand/generic_struct.expanded.rs
@@ -56,7 +56,7 @@ const _: () = {
                 Ok(js) => js.into_abi(),
                 Err(err) => {
                     let loc = core::panic::Location::caller();
-                    let msg = {
+                    let msg = ::alloc::__export::must_use({
                         let res = ::alloc::fmt::format(
                             format_args!(
                                 "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -64,7 +64,7 @@ const _: () = {
                             ),
                         );
                         res
-                    };
+                    });
                     {
                         #[cold]
                         #[track_caller]
@@ -103,7 +103,7 @@ const _: () = {
                 Ok(js) => js.into(),
                 Err(err) => {
                     let loc = core::panic::Location::caller();
-                    let msg = {
+                    let msg = ::alloc::__export::must_use({
                         let res = ::alloc::fmt::format(
                             format_args!(
                                 "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -111,7 +111,7 @@ const _: () = {
                             ),
                         );
                         res
-                    };
+                    });
                     {
                         #[cold]
                         #[track_caller]
@@ -143,7 +143,7 @@ const _: () = {
                     Ok(js) => js.into(),
                     Err(err) => {
                         let loc = core::panic::Location::caller();
-                        let msg = {
+                        let msg = ::alloc::__export::must_use({
                             let res = ::alloc::fmt::format(
                                 format_args!(
                                     "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -151,7 +151,7 @@ const _: () = {
                                 ),
                             );
                             res
-                        };
+                        });
                         {
                             #[cold]
                             #[track_caller]
@@ -295,7 +295,7 @@ const _: () = {
                 Ok(js) => js.into_abi(),
                 Err(err) => {
                     let loc = core::panic::Location::caller();
-                    let msg = {
+                    let msg = ::alloc::__export::must_use({
                         let res = ::alloc::fmt::format(
                             format_args!(
                                 "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -303,7 +303,7 @@ const _: () = {
                             ),
                         );
                         res
-                    };
+                    });
                     {
                         #[cold]
                         #[track_caller]
@@ -342,7 +342,7 @@ const _: () = {
                 Ok(js) => js.into(),
                 Err(err) => {
                     let loc = core::panic::Location::caller();
-                    let msg = {
+                    let msg = ::alloc::__export::must_use({
                         let res = ::alloc::fmt::format(
                             format_args!(
                                 "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -350,7 +350,7 @@ const _: () = {
                             ),
                         );
                         res
-                    };
+                    });
                     {
                         #[cold]
                         #[track_caller]
@@ -382,7 +382,7 @@ const _: () = {
                     Ok(js) => js.into(),
                     Err(err) => {
                         let loc = core::panic::Location::caller();
-                        let msg = {
+                        let msg = ::alloc::__export::must_use({
                             let res = ::alloc::fmt::format(
                                 format_args!(
                                     "(Converting type failed) {0} ({1}:{2}:{3})", err, loc
@@ -390,7 +390,7 @@ const _: () = {
                                 ),
                             );
                             res
-                        };
+                        });
                         {
                             #[cold]
                             #[track_caller]