diff --git a/tests/frametest.c b/tests/frametest.c
index 01f1300..7d69ff7 100644
--- a/tests/frametest.c
+++ b/tests/frametest.c
@@ -41,8 +41,11 @@
 #include <string.h>     /* strcmp */
 #include <time.h>       /* clock_t, clock(), CLOCKS_PER_SEC */
 #include <assert.h>
+#include "lz4frame.h"   /* include multiple times to test correctness/safety */
+#include "lz4frame.h"
 #define LZ4F_STATIC_LINKING_ONLY
 #include "lz4frame.h"
+#include "lz4frame.h"
 #include "lz4.h"        /* LZ4_VERSION_STRING */
 #define XXH_STATIC_LINKING_ONLY
 #include "xxhash.h"     /* XXH64 */