diff --git a/pkg/tweetnacl/src/randombytes.c b/pkg/tweetnacl/src/randombytes.c
index 853a26511a53c10ea3c694c23cca7c57c4ec9d10..ce3f938566ffb2b2a54678f72eda1cb47c32fdac 100644
--- a/pkg/tweetnacl/src/randombytes.c
+++ b/pkg/tweetnacl/src/randombytes.c
@@ -7,12 +7,8 @@
  */
 
 #include <stdint.h>
-#include <string.h>
-
 #include "random.h"
 
-#include <stdio.h>
-
 void randombytes(uint8_t *target, uint64_t n)
 {
     /* tweetnacl needs uint64_t as "n" parameter, random provides uint32 */
diff --git a/tests/unittests/tests-tweetnacl/tests-tweetnacl.c b/tests/unittests/tests-tweetnacl/tests-tweetnacl.c
index b10ddd899cbb043f1caab8a6e1a6e78b25860fed..bd94ac88f6855e0c398bf85013ebbf82dbfe6183 100644
--- a/tests/unittests/tests-tweetnacl/tests-tweetnacl.c
+++ b/tests/unittests/tests-tweetnacl/tests-tweetnacl.c
@@ -19,7 +19,6 @@
  * @}
  */
 
-#include <stdio.h>
 #include <string.h>
 
 #include <tweetnacl.h>
diff --git a/tests/unittests/tests-tweetnacl/tests-tweetnacl.h b/tests/unittests/tests-tweetnacl/tests-tweetnacl.h
index 2ae24c9c655ad2c03d17d212173ac262ad7ee00d..82eb3ca0e9e31a1848252ea26d5e3e9a00f140dd 100644
--- a/tests/unittests/tests-tweetnacl/tests-tweetnacl.h
+++ b/tests/unittests/tests-tweetnacl/tests-tweetnacl.h
@@ -25,24 +25,11 @@
 extern "C" {
 #endif
 
-/**
- * @brief MANDATORY function for collecting random Bytes
- *        required by the tweetnacl package
- */
-extern void randombytes(uint8_t *target, uint64_t n);
-
 /**
 *  @brief   The entry point of this test suite.
 */
 void tests_tweetnacl(void);
 
-/**
- * @brief   Generates tests for tweetnacl
- *
- * @return  embUnit tests if successful, NULL if not.
- */
-Test *tests_tweetnacl_tests(void);
-
 #ifdef __cplusplus
 }
 #endif