diff --git a/glib/gmain.c b/glib/gmain.c
index 329e6d399..ded5dccbf 100644
--- a/glib/gmain.c
+++ b/glib/gmain.c
@@ -5670,9 +5670,6 @@ ref_unix_signal_handler_unlocked (int signum)
       action.sa_flags = SA_RESTART | SA_NOCLDSTOP;
 #else
       action.sa_flags = SA_NOCLDSTOP;
-#endif
-#ifdef SA_ONSTACK
-      action.sa_flags |= SA_ONSTACK;
 #endif
       sigaction (signum, &action, NULL);
     }
diff --git a/glib/tests/unix.c b/glib/tests/unix.c
index 08c36c929..1defb3de0 100644
--- a/glib/tests/unix.c
+++ b/glib/tests/unix.c
@@ -30,7 +30,6 @@
 #include "glib-unix.h"
 #include "gstdio.h"
 
-#include <signal.h>
 #include <string.h>
 #include <pwd.h>
 #include <unistd.h>
@@ -508,7 +507,6 @@ on_sig_received_2 (gpointer data)
 static void
 test_signal (int signum)
 {
-  struct sigaction action;
   GMainLoop *mainloop;
   int id;
 
@@ -517,17 +515,6 @@ test_signal (int signum)
   sig_received = FALSE;
   sig_counter = 0;
   g_unix_signal_add (signum, on_sig_received, mainloop);
-
-  g_assert_no_errno (sigaction (signum, NULL, &action));
-
-  g_assert_true (action.sa_flags & SA_NOCLDSTOP);
-#ifdef SA_RESTART
-  g_assert_true (action.sa_flags & SA_RESTART);
-#endif
-#ifdef SA_ONSTACK
-  g_assert_true (action.sa_flags & SA_ONSTACK);
-#endif
-
   kill (getpid (), signum);
   g_assert (!sig_received);
   id = g_timeout_add (5000, on_sig_timeout, mainloop);
@@ -567,46 +554,6 @@ test_sigterm (void)
   test_signal (SIGTERM);
 }
 
-static void
-test_signal_alternate_stack (int signal)
-{
-#ifndef SA_ONSTACK
-  g_test_skip ("alternate stack is not supported");
-#else
-  guint8 stack_memory[MINSIGSTKSZ];
-  guint8 zero_mem[MINSIGSTKSZ];
-  stack_t stack = { .ss_sp = stack_memory, .ss_size = MINSIGSTKSZ };
-  stack_t old_stack = { 0 };
-
-  memset (stack_memory, 0, MINSIGSTKSZ);
-  memset (zero_mem, 0, MINSIGSTKSZ);
-  g_assert_cmpmem (stack_memory, MINSIGSTKSZ, zero_mem, MINSIGSTKSZ);
-
-  g_assert_no_errno (sigaltstack (&stack, &old_stack));
-
-  test_signal (signal);
-
-  /* Very stupid check to ensure that the alternate stack is used instead of
-   * the default one. This test would fail if SA_ONSTACK wouldn't be set.
-   */
-  g_assert_cmpint (memcmp (stack_memory, zero_mem, MINSIGSTKSZ), !=, 0);
-
-  g_assert_no_errno (sigaltstack (&old_stack, NULL));
-#endif
-}
-
-static void
-test_sighup_alternate_stack (void)
-{
-  test_signal_alternate_stack (SIGHUP);
-}
-
-static void
-test_sigterm_alternate_stack (void)
-{
-  test_signal_alternate_stack (SIGTERM);
-}
-
 static void
 test_sighup_add_remove (void)
 {
@@ -860,9 +807,6 @@ main (int   argc,
   g_test_add_func ("/glib-unix/sighup", test_sighup);
   g_test_add_func ("/glib-unix/sigterm", test_sigterm);
   g_test_add_func ("/glib-unix/sighup_again", test_sighup);
-  g_test_add_func ("/glib-unix/sighup/alternate-stack", test_sighup_alternate_stack);
-  g_test_add_func ("/glib-unix/sigterm/alternate-stack", test_sigterm_alternate_stack);
-  g_test_add_func ("/glib-unix/sighup_again/alternate-stack", test_sighup_alternate_stack);
   g_test_add_func ("/glib-unix/sighup_add_remove", test_sighup_add_remove);
   g_test_add_func ("/glib-unix/sighup_nested", test_sighup_nested);
   g_test_add_func ("/glib-unix/callback_after_signal", test_callback_after_signal);