Fuzztest: AVR doesnt have enough RAM for 4kB buffers
diff --git a/tests/fuzztest/fuzztest.c b/tests/fuzztest/fuzztest.c
index 31e4769..93065ae 100644
--- a/tests/fuzztest/fuzztest.c
+++ b/tests/fuzztest/fuzztest.c
@@ -13,7 +13,11 @@
 #include "alltypes_static.pb.h"
 #include "alltypes_pointer.pb.h"
 
+#ifdef __AVR__
+#define BUFSIZE 2048
+#else
 #define BUFSIZE 4096
+#endif
 
 static uint64_t random_seed;