diff --git a/ports/stm8/atomport-tests.h b/ports/stm8/atomport-tests.h
index ca8b29d..b157a48 100644
--- a/ports/stm8/atomport-tests.h
+++ b/ports/stm8/atomport-tests.h
@@ -46,7 +46,7 @@
 #define _STR
 
 /* Default thread stack size (in bytes) */
-#define TEST_THREAD_STACK_SIZE      128
+#define TEST_THREAD_STACK_SIZE      192
 
 /* Uncomment to enable logging of stack usage to UART */
 #define TESTS_LOG_STACK_USAGE