diff --git a/tests/ch341a_spi.c b/tests/ch341a_spi.c
index 1cb265249..50b3d11db 100644
--- a/tests/ch341a_spi.c
+++ b/tests/ch341a_spi.c
@@ -13,6 +13,8 @@
  * GNU General Public License for more details.
  */
 
+#include <stdlib.h>
+
 #include "lifecycle.h"
 
 #if CONFIG_CH341A_SPI == 1
diff --git a/tests/chip_wp.c b/tests/chip_wp.c
index 1fa6bb9c8..4f0162d33 100644
--- a/tests/chip_wp.c
+++ b/tests/chip_wp.c
@@ -16,6 +16,7 @@
 
 #include <include/test.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "chipdrivers.h"
diff --git a/tests/erase_func_algo.c b/tests/erase_func_algo.c
index b2a09dce2..d947eb965 100644
--- a/tests/erase_func_algo.c
+++ b/tests/erase_func_algo.c
@@ -13,6 +13,7 @@
 
 #include <include/test.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "tests.h"
diff --git a/tests/flashrom.c b/tests/flashrom.c
index cc8883132..52cc9c85a 100644
--- a/tests/flashrom.c
+++ b/tests/flashrom.c
@@ -13,9 +13,10 @@
  * GNU General Public License for more details.
  */
 
+#include <stdlib.h>
+
 #include <include/test.h>
 #include "tests.h"
-
 #include "programmer.h"
 
 #define assert_equal_and_free(text, expected)	\
diff --git a/tests/helpers.c b/tests/helpers.c
index 271fb4831..95a161994 100644
--- a/tests/helpers.c
+++ b/tests/helpers.c
@@ -19,6 +19,7 @@
 #include "flash.h"
 
 #include <stdint.h>
+#include <stdlib.h>
 
 void address_to_bits_test_success(void **state)
 {
diff --git a/tests/linux_mtd.c b/tests/linux_mtd.c
index 3aaa5abda..0cee7857c 100644
--- a/tests/linux_mtd.c
+++ b/tests/linux_mtd.c
@@ -13,6 +13,8 @@
  * GNU General Public License for more details.
  */
 
+#include <stdlib.h>
+
 #include "lifecycle.h"
 
 #if CONFIG_LINUX_MTD == 1
diff --git a/tests/raiden_debug_spi.c b/tests/raiden_debug_spi.c
index 4f0bdd3f9..8ec0617dc 100644
--- a/tests/raiden_debug_spi.c
+++ b/tests/raiden_debug_spi.c
@@ -13,6 +13,8 @@
  * GNU General Public License for more details.
  */
 
+#include <stdlib.h>
+
 #include "lifecycle.h"
 
 #if CONFIG_RAIDEN_DEBUG_SPI == 1
diff --git a/tests/tests.c b/tests/tests.c
index 8a9dc6b4f..3fee05681 100644
--- a/tests/tests.c
+++ b/tests/tests.c
@@ -20,6 +20,7 @@
 #include "io_real.h"
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
 #include <pthread.h>