diff --git a/js/tests/verydisco-reverso_test.mjs b/js/tests/verydisco-reverso_test.mjs
new file mode 100644
index 000000000..924593b6f
--- /dev/null
+++ b/js/tests/verydisco-reverso_test.mjs
@@ -0,0 +1,42 @@
+import fs from 'fs/promises'
+const readFile = fs.readFile
+const writeFile = fs.writeFile
+import { promisify } from 'util'
+import * as cp from 'child_process'
+
+const exec = promisify(cp.exec)
+
+export const tests = []
+const name = 'verydisco-reverso'
+const hasContentAndExpect = async ({ content, expect, path, eq }) => {
+  const cwd = `${path
+    .split('/')
+    .slice(0, -1)
+    .join('/')}/`
+
+  await writeFile(`${cwd}${name}.txt`, content, 'utf8')
+  const { stdout } = await exec(`node ${name}.mjs "${name}.txt"`, { cwd })
+  await exec(`rm ${name}.txt`, { cwd })
+
+  return eq(stdout.trim(), expect)
+}
+
+tests.push(async ({ path, eq }) =>
+  hasContentAndExpect({
+    path,
+    eq,
+    content: `deNo si omeawes`,
+    expect: 'Node is awesome',
+  }),
+)
+
+// tests.push(async ({ path, eq }) => {
+//   await hasContentAndExpect({
+//     path,
+//     eq,
+//     content: // newfilename,
+//     expect: // reverso
+//   })
+// })
+
+Object.freeze(tests)
diff --git a/subjects/verydisco-reverso/README.md b/subjects/verydisco-reverso/README.md
new file mode 100644
index 000000000..c6829686c
--- /dev/null
+++ b/subjects/verydisco-reverso/README.md
@@ -0,0 +1,24 @@
+## verydisco-reverso
+
+### Instructions
+
+Create a `verydisco-reverso.mjs` script that:
+- takes the name of a file (with extension) in argument
+- read this file
+- discover the content of this file by reversing it from the `very disco` mode
+- print the result in console
+
+For example:
+- Reading the `verydisco` content of your `verydisco.txt` file would print `discovery` in console.
+
+### Notions
+
+- [Node file system: `readFile`](https://nodejs.org/api/fs.html#fs_fspromises_writefile_file_data_options)
+<!-- and also Math.floors ? -->
+<!--
+  again?
+- [Node path: `resolve`](https://nodejs.org/api/path.html#path_path_resolve_paths)
+- [Node path: `join`](https://nodejs.org/api/path.html#path_path_join_paths)
+-->
+
+