diff --git a/tests/pkg_micro-ecc/Makefile b/tests/pkg_micro-ecc/Makefile
index a1a70b69e8..7e246a00c7 100644
--- a/tests/pkg_micro-ecc/Makefile
+++ b/tests/pkg_micro-ecc/Makefile
@@ -4,3 +4,8 @@ USEMODULE += hashes
 USEPKG += micro-ecc
 
 include $(RIOTBASE)/Makefile.include
+
+# Increase Stack size for AVR
+ifneq (,$(filter avr8_common,$(USEMODULE)))
+  CFLAGS += -DTHREAD_STACKSIZE_MAIN=THREAD_STACKSIZE_LARGE
+endif