diff --git a/tests/mcp/annotate.spec.ts b/tests/mcp/annotate.spec.ts
index ded999196d90f..78f171d4f6e37 100644
--- a/tests/mcp/annotate.spec.ts
+++ b/tests/mcp/annotate.spec.ts
@@ -443,7 +443,8 @@ test('should cancel browser_annotate when the MCP client disconnects', async ({
});
-test('should switch screencast to -s session on show --annotate', async ({ connectToDashboard, cli, server }) => {
+test('should switch screencast to -s session on show --annotate', async ({ connectToDashboard, cli, server, mcpBrowser }) => {
+ test.fixme(mcpBrowser === 'firefox' && process.platform === 'win32', 'Flaky on Firefox/Windows: the bound show server occasionally never registers, so connectToDashboard times out with "reading \'endpoint\'".');
test.slow();
server.setContent('/red', '', 'text/html');
server.setContent('/green', '', 'text/html');