diff --git a/testing/cxxtest/Makefile b/testing/cxxtest/Makefile
index ea2af7640..d2bb10a3b 100644
--- a/testing/cxxtest/Makefile
+++ b/testing/cxxtest/Makefile
@@ -43,7 +43,7 @@ MAINSRC = cxxtest_main.cxx
 
 PROGNAME = cxxtest
 PRIORITY = SCHED_PRIORITY_DEFAULT
-STACKSIZE = 4096
+STACKSIZE = $(CONFIG_DEFAULT_TASK_STACKSIZE)
 MODULE = $(CONFIG_TESTING_CXXTEST)
 
 include $(APPDIR)/Application.mk