diff --git a/packages/reffuse/src/tests.ts b/packages/reffuse/src/tests.ts
new file mode 100644
index 0000000..c5c9791
--- /dev/null
+++ b/packages/reffuse/src/tests.ts
@@ -0,0 +1,23 @@
+import { Console, Effect, Fiber, Ref, Stream, SubscriptionRef } from "effect"
+
+
+await Effect.gen(function*() {
+    const ref = yield* SubscriptionRef.make("juif")
+    const stream = ref.changes
+
+    const f1 = yield* Stream.runForEach(stream, v => Console.log(`observer 1: ${ v }`)).pipe(
+        Effect.fork,
+    )
+    const f2 = yield* Effect.sleep("200 millis").pipe(
+        Effect.andThen(Stream.runForEach(stream, v => Console.log(`observer 2: ${ v }`))),
+        Effect.fork,
+    )
+    const f3 = yield* Effect.sleep("100 millis").pipe(
+        Effect.andThen(Ref.set(ref, "adolf")),
+        Effect.fork,
+    )
+
+    yield* Fiber.joinAll([f1, f2, f3])
+}).pipe(
+    Effect.runPromise
+)