diff --git a/web/test-browser-wasm-smoke-opfs-mirror-sections.js b/web/test-browser-wasm-smoke-opfs-mirror-sections.js
index d36a6be..a52a05c 100644
--- a/web/test-browser-wasm-smoke-opfs-mirror-sections.js
+++ b/web/test-browser-wasm-smoke-opfs-mirror-sections.js
@@ -1,8 +1,11 @@
 export async function runBrowserOpfsMirrorSections(context, simulator) {
   const {
+    expectEvent,
     expectMissingWasmPath,
     expectText,
+    near,
     runSection,
+    withSmokeSimulator,
   } = context;
 
   await runSection("opfs wasm mirror persist file", async () => {
@@ -20,6 +23,25 @@ export async function runBrowserOpfsMirrorSections(context, simulator) {
       "persisted WASM filesystem file was not readable from OPFS");
   });
 
+  await runSection("opfs persisted wasm mirror parse in new instance", async () => {
+    await withSmokeSimulator(async (restoredMirrorSimulator) => {
+      // LinuxCNC source basis: rs274ngc_pre.cc read_text() reads
+      // program blocks after the OPFS file is mirrored into the WASM FS.
+      const persistedProgram = new TextDecoder().decode(
+        await restoredMirrorSimulator.fs.opfs.readFile("programs/browser-persisted.ngc"),
+      );
+      expectText(persistedProgram, "G21 G90\nG0 X2\n",
+        "persisted WASM mirror file was not restored from OPFS in a new instance");
+      const persistedEvents = await restoredMirrorSimulator.parseFile(
+        "programs/browser-persisted.ngc",
+        "linuxcnc",
+        { backend: "linuxcnc-rs274" },
+      );
+      expectEvent(persistedEvents, (event) => event.type === "rapid" && near(event.end.x, 2),
+        "persisted WASM mirror file was not parsed through LinuxCNC in a new instance");
+    });
+  });
+
   await runSection("opfs copy and move mirror files", async () => {
     // LinuxCNC source basis: rs274ngc_pre.cc save_parameters()
     // links the current parameter file to filename + ".bak", then