diff --git a/test/rt/configuration.xml b/test/rt/configuration.xml
index 261321440..fda3392ee 100644
--- a/test/rt/configuration.xml
+++ b/test/rt/configuration.xml
@@ -411,6 +411,9 @@ chSysEnable();]]></value>
                     <code>
                       <value><![CDATA[systime_t time = chVTGetSystemTimeX();
 while (time == chVTGetSystemTimeX()) {
+#if defined(SIMULATOR)
+  _sim_check_for_interrupts();
+#endif
 }]]></value>
                     </code>
                   </step>
@@ -3918,7 +3921,7 @@ test_assert(threads[1] != NULL, "thread creation failed");]]></value>
                     </tags>
                     <code>
                       <value><![CDATA[threads[2] = chThdCreateFromHeap(&heap1,
-                                 THD_WORKING_AREA_SIZE(THREADS_STACK_SIZE * 16),
+                                 THD_WORKING_AREA_SIZE(THREADS_STACK_SIZE * 1024),
                                  "dyn3",
                                  prio-3, dyn_thread1, "C");
 test_assert(threads[2] == NULL, "thread creation not failed");]]></value>
diff --git a/test/rt/source/test/test_sequence_001.c b/test/rt/source/test/test_sequence_001.c
index 5f6ec1e5d..fa50d05f3 100644
--- a/test/rt/source/test/test_sequence_001.c
+++ b/test/rt/source/test/test_sequence_001.c
@@ -252,6 +252,9 @@ static void test_001_004_execute(void) {
   {
     systime_t time = chVTGetSystemTimeX();
     while (time == chVTGetSystemTimeX()) {
+#if defined(SIMULATOR)
+      _sim_check_for_interrupts();
+#endif
     }
   }
 }
diff --git a/test/rt/source/test/test_sequence_011.c b/test/rt/source/test/test_sequence_011.c
index 3094a0225..6361b8202 100644
--- a/test/rt/source/test/test_sequence_011.c
+++ b/test/rt/source/test/test_sequence_011.c
@@ -138,7 +138,7 @@ static void test_011_001_execute(void) {
   test_set_step(5);
   {
     threads[2] = chThdCreateFromHeap(&heap1,
-                                     THD_WORKING_AREA_SIZE(THREADS_STACK_SIZE * 16),
+                                     THD_WORKING_AREA_SIZE(THREADS_STACK_SIZE * 1024),
                                      "dyn3",
                                      prio-3, dyn_thread1, "C");
     test_assert(threads[2] == NULL, "thread creation not failed");