diff --git a/core/host/stack_trace.c b/core/host/stack_trace.c
index 67ceac5891..2d63efd625 100644
--- a/core/host/stack_trace.c
+++ b/core/host/stack_trace.c
@@ -84,7 +84,6 @@ static void __attribute__((noinline)) _task_dump_trace_dispatch(int sig)
 		pthread_kill(task_get_thread(running), SIGNAL_TRACE_DUMP);
 	} else {
 		_task_dump_trace_impl(SIGNAL_TRACE_OFFSET);
-		udelay(100 * MSEC); /* Leave time for stderr to flush */
 		exit(1);
 	}
 }
diff --git a/core/host/timer.c b/core/host/timer.c
index ff17ddf068..124f17c14f 100644
--- a/core/host/timer.c
+++ b/core/host/timer.c
@@ -15,14 +15,25 @@
 #include "util.h"
 
 /*
- * For test that need to test for longer than 10 seconds, adjust
- * its time scale in test/build.mk by specifying
+ * For test that need to test for longer than the default time limit,
+ * adjust its time scale in test/build.mk by specifying
  * <test_name>-scale=<new scale>.
  */
 #ifndef TEST_TIME_SCALE
 #define TEST_TIME_SCALE 1
 #endif
 
+/*
+ * To increase the stability of timing sensitive unit tests, slow
+ * down the time by 10x. This only affects active run time (including
+ * udelay() calls). To an unit test, the only effect is increased code
+ * execution speed. However, this comes at the cost of prolonged test
+ * run time for tests that use udelay(). Fortunately, most of our tests
+ * use usleep/msleep, and for tests that use udelay(), we can scale
+ * the time as mentioned above.
+ */
+#define TEST_TIME_SLOW_DOWN 10
+
 static timestamp_t boot_time;
 static int time_set;
 
@@ -45,7 +56,7 @@ timestamp_t _get_time(void)
 	timestamp_t ret;
 	clock_gettime(CLOCK_MONOTONIC, &ts);
 	ret.val = (1000000000 * (uint64_t)ts.tv_sec + ts.tv_nsec) *
-		  TEST_TIME_SCALE / 1000;
+		  TEST_TIME_SCALE / 1000 / TEST_TIME_SLOW_DOWN;
 	return ret;
 }
 
diff --git a/test/build.mk b/test/build.mk
index a2094ba112..f503188410 100644
--- a/test/build.mk
+++ b/test/build.mk
@@ -44,6 +44,7 @@ hooks-y=hooks.o
 host_command-y=host_command.o
 inductive_charging-y=inductive_charging.o
 interrupt-y=interrupt.o
+interrupt-scale=10
 kb_8042-y=kb_8042.o
 kb_mkbp-y=kb_mkbp.o
 kb_scan-y=kb_scan.o