diff --git a/tests/pipe/main.c b/tests/pipe/main.c
index f1edc2a20d..4a14daa907 100644
--- a/tests/pipe/main.c
+++ b/tests/pipe/main.c
@@ -29,7 +29,6 @@
 #include <inttypes.h>
 
 #include "thread.h"
-#include "flags.h"
 #include "kernel.h"
 #include "pipe.h"
 #include "pipe.h"
diff --git a/tests/unittests/tests-core/tests-core-ringbuffer.c b/tests/unittests/tests-core/tests-core-ringbuffer.c
index 694aa20157..d3f5413172 100644
--- a/tests/unittests/tests-core/tests-core-ringbuffer.c
+++ b/tests/unittests/tests-core/tests-core-ringbuffer.c
@@ -17,7 +17,6 @@
  */
 
 #include "thread.h"
-#include "flags.h"
 #include "kernel.h"
 #include "ringbuffer.h"
 #include "mutex.h"