diff '--color=auto' -r -U3 sbcl-2.5.10.orig/contrib/sb-concurrency/tests/test-frlock.lisp sbcl-2.5.10/contrib/sb-concurrency/tests/test-frlock.lisp
--- sbcl-2.5.10.orig/contrib/sb-concurrency/tests/test-frlock.lisp	2025-10-28 00:13:20.000000000 +0700
+++ sbcl-2.5.10/contrib/sb-concurrency/tests/test-frlock.lisp	2025-11-01 19:10:56.810091410 +0700
@@ -83,7 +83,7 @@
 #+sb-thread
 (deftest frlock.1
     (handler-case
-        (sb-ext:with-timeout (* 40 #+gc-stress 10)
+        (sb-ext:with-timeout (* 240 #+gc-stress 10)
           (test-frlocks #+win32 :outer-write-pause #+win32 t ))
       (sb-ext:timeout (c)
         (error "~A" c)))