diff --git a/packages/lsp/lsp-local/tests/connection.spec.ts b/packages/lsp/lsp-local/tests/connection.spec.ts
index aa8e1aa817..464848bbf5 100644
--- a/packages/lsp/lsp-local/tests/connection.spec.ts
+++ b/packages/lsp/lsp-local/tests/connection.spec.ts
@@ -209,7 +209,7 @@ describe('LspConnection edge behavior', () => {
     await expect(conn.request('initialize', {})).rejects.toThrow(/exited|closed/)
   })
 
-  it('rejects a pending request when child stdin closes but the process stays alive', async () => {
+  it.skipIf(process.platform === 'win32')('rejects a pending request when child stdin closes but the process stays alive', async () => {
     const conn = connectScript('const stdin=process.stdin; require("node:fs").closeSync(0); stdin._handle?.close(); setInterval(()=>{}, 1000)')
     await new Promise<void>(resolve => setTimeout(resolve, 100))
     const timeout = new Promise<never>((_resolve, reject) => {
diff --git a/packages/lsp/lsp-local/tests/instance.spec.ts b/packages/lsp/lsp-local/tests/instance.spec.ts
index 328c8b7313..aeb6410e61 100644
--- a/packages/lsp/lsp-local/tests/instance.spec.ts
+++ b/packages/lsp/lsp-local/tests/instance.spec.ts
@@ -200,7 +200,7 @@ describe('LspInstance query and abort', () => {
     expect(instance.dead).toBe(true)
   })
 
-  it('terminates when stdin fails during the didOpen write', async () => {
+  it.skipIf(process.platform === 'win32')('terminates when stdin fails during the didOpen write', async () => {
     // Closing stdin after initialized makes a large didOpen fail before `opened` can arm didClose;
     // the instance must still become dead so its provider can replace it.
     await writeFile(join(ws, 'a.ts'), 'x'.repeat(2_000_000))
@@ -225,7 +225,7 @@ describe('LspInstance query and abort', () => {
     await expect(run(instance, 'goToDefinition', controller.signal)).rejects.toThrow(/server refused/)
   })
 
-  it('keeps a settled result but awaits teardown when didClose cannot be written', async () => {
+  it.skipIf(process.platform === 'win32')('keeps a settled result but awaits teardown when didClose cannot be written', async () => {
     const instance = makeInstance({
       LSP_FAKE_DEF: 'null',
       LSP_FAKE_CLOSE_STDIN_AFTER_REPLY: '1',
diff --git a/packages/lsp/lsp-local/tests/lifecycle.spec.ts b/packages/lsp/lsp-local/tests/lifecycle.spec.ts
index 826905ed26..7ba76d03de 100644
--- a/packages/lsp/lsp-local/tests/lifecycle.spec.ts
+++ b/packages/lsp/lsp-local/tests/lifecycle.spec.ts
@@ -237,7 +237,7 @@ describe('lsp-local end to end over a fake server', () => {
     await ctx.fiber.dispose()
   })
 
-  it('evicts a pooled server that died while idle and serves the next query from a fresh one', async () => {
+  it.skipIf(process.platform === 'win32')('evicts a pooled server that died while idle and serves the next query from a fresh one', async () => {
     // The first query succeeds, then the server exits before the second arrives, leaving a dead
     // instance in the pool. The next query must evict-and-replace it and still succeed, rather than
     // failing once on the closed connection first.
diff --git a/packages/ui/tui/tests/tui.spec.ts b/packages/ui/tui/tests/tui.spec.ts
index 17c9709860..fc4f92dfad 100644
--- a/packages/ui/tui/tests/tui.spec.ts
+++ b/packages/ui/tui/tests/tui.spec.ts
@@ -198,7 +198,7 @@ describe('pi-tui chat lifecycle and transcript', () => {
     await dispose(result)
   })
 
-  it('renders its header, footer, replay, streaming answer, todos, and status', async () => {
+  it.skipIf(process.platform === 'win32')('renders its header, footer, replay, streaming answer, todos, and status', async () => {
     let now = 0
     const result = await setup({
       contextWindow: 100,