Both tests rely on JS-level spies that the upstream Workspace refactor bypasses:
1. spyOn(globalThis, "fetch") doesn't intercept anymore. The Effect FetchHttpClient layer holds fetch as a fiber-ref with defaultValue: () => globalThis.fetch, captured at fiber start. The spy descriptor isn't observed through that ref — calls go to the original fetch and produce Transport errors against workspace.test.
2. spyOn(SyncEvent, "replayAll") spies the module-level wrapper. Upstream's Workspace.Service now yields SyncEvent.Service inside the layer and calls sync.replayAll(events) on the Service directly, never touching the module-level export.
Restoring coverage requires injecting Effect-side mock layers (custom HttpClient + SyncEvent.Service). Out of scope for the merge resolution. Tracked for follow-up.
Mark IJbema
0c1be058e3