diff --git a/kernel/os/selftest/src/testcases/os_mutex_test_basic.c b/kernel/os/selftest/src/testcases/os_mutex_test_basic.c
index 53169a279f..08bf1ad7b8 100644
--- a/kernel/os/selftest/src/testcases/os_mutex_test_basic.c
+++ b/kernel/os/selftest/src/testcases/os_mutex_test_basic.c
@@ -25,5 +25,5 @@ TEST_CASE_TASK(os_mutex_test_basic)
     os_mutex_init(&g_mutex1);
     taskpool_alloc_assert(mutex_test_basic_handler,
                           MYNEWT_VAL(OS_MAIN_TASK_PRIO) + 2);
-    taskpool_wait_assert(200);
+    taskpool_wait_assert(400);
 }
diff --git a/kernel/os/selftest/src/testcases/os_mutex_test_case_1.c b/kernel/os/selftest/src/testcases/os_mutex_test_case_1.c
index c83911c9cb..22ac3bc1d3 100644
--- a/kernel/os/selftest/src/testcases/os_mutex_test_case_1.c
+++ b/kernel/os/selftest/src/testcases/os_mutex_test_case_1.c
@@ -42,5 +42,5 @@ TEST_CASE_TASK(os_mutex_test_case_1)
     taskpool_alloc_assert(mutex_task3_handler,
                           MYNEWT_VAL(OS_MAIN_TASK_PRIO) + 4);
 
-    taskpool_wait_assert(200);
+    taskpool_wait_assert(400);
 }
diff --git a/kernel/os/selftest/src/testcases/os_mutex_test_case_2.c b/kernel/os/selftest/src/testcases/os_mutex_test_case_2.c
index 7a00de57ad..ce10d1325e 100644
--- a/kernel/os/selftest/src/testcases/os_mutex_test_case_2.c
+++ b/kernel/os/selftest/src/testcases/os_mutex_test_case_2.c
@@ -39,5 +39,5 @@ TEST_CASE_TASK(os_mutex_test_case_2)
     taskpool_alloc_assert(mutex_task4_handler,
                           MYNEWT_VAL(OS_MAIN_TASK_PRIO) + 5);
 
-    taskpool_wait_assert(200);
+    taskpool_wait_assert(400);
 }