diff --git a/test/shader_io/shared_struct_helper_function.wgsl.expected.hlsl b/test/shader_io/shared_struct_helper_function.wgsl.expected.hlsl
new file mode 100644
index 0000000..46dca7e
--- /dev/null
+++ b/test/shader_io/shared_struct_helper_function.wgsl.expected.hlsl
@@ -0,0 +1,23 @@
+struct VertexOutput {
+  float4 pos;
+  int loc0;
+};
+
+VertexOutput foo(float x) {
+  const VertexOutput tint_symbol = {float4(x, x, x, 1.0f), 42};
+  return tint_symbol;
+}
+
+VertexOutput vert_main1() {
+  return foo(0.5f);
+}
+
+VertexOutput vert_main2() {
+  return foo(0.25f);
+}
+
+[numthreads(1, 1, 1)]
+void unused_entry_point() {
+  return;
+}
+