diff --git a/tests_reg/test/framework/test_framework.c b/tests_reg/test/framework/test_framework.c
index f9a5c4d..b9693b1 100644
--- a/tests_reg/test/framework/test_framework.c
+++ b/tests_reg/test/framework/test_framework.c
@@ -8,7 +8,6 @@
 #include "test_framework.h"
 
 #include <assert.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/tests_reg/test/framework/test_framework.h b/tests_reg/test/framework/test_framework.h
index c01c34d..ef614df 100644
--- a/tests_reg/test/framework/test_framework.h
+++ b/tests_reg/test/framework/test_framework.h
@@ -10,7 +10,6 @@
 
 #include <stdarg.h>
 #include <stdint.h>
-#include <stdio.h>
 
 #include "test_log.h"
 #include "test_framework_helpers.h"
diff --git a/tests_reg/test/framework/test_framework_helpers.c b/tests_reg/test/framework/test_framework_helpers.c
index a467a04..25a010f 100644
--- a/tests_reg/test/framework/test_framework_helpers.c
+++ b/tests_reg/test/framework/test_framework_helpers.c
@@ -7,8 +7,6 @@
 
 #include "test_framework_helpers.h"
 
-#include <stdio.h>
-
 void printf_set_color(enum serial_color_t color_id)
 {
     TEST_LOG("\33[%dm", color_id);
diff --git a/tests_reg/test/framework/test_framework_integ_test_helper.c b/tests_reg/test/framework/test_framework_integ_test_helper.c
index 3d0eefd..18dba96 100644
--- a/tests_reg/test/framework/test_framework_integ_test_helper.c
+++ b/tests_reg/test/framework/test_framework_integ_test_helper.c
@@ -5,7 +5,7 @@
  *
  */
 
-#include <stdio.h>
+#include <stddef.h>
 
 #include "test_framework.h"
 #include "test_framework_integ_test_helper.h"
diff --git a/tests_reg/test/framework/test_log.h b/tests_reg/test/framework/test_log.h
index 1fc0b3d..995f726 100644
--- a/tests_reg/test/framework/test_log.h
+++ b/tests_reg/test/framework/test_log.h
@@ -10,6 +10,8 @@
 
 #ifdef USE_SP_LOG
 #include "tfm_sp_log.h"
+#elif defined USE_STDIO
+#include <stdio.h>
 #else
 #include "tfm_log_raw.h"
 #endif /* USE_SP_LOG */
@@ -18,7 +20,7 @@
 extern "C" {
 #endif
 
-#ifdef USE_SP_LOG
+#if defined USE_SP_LOG || USE_STDIO
 #define TEST_LOG(...) printf(__VA_ARGS__)
 #else
 #define TEST_LOG(...) tfm_log_printf(__VA_ARGS__)
diff --git a/tests_reg/test/ns_regression/CMakeLists.txt b/tests_reg/test/ns_regression/CMakeLists.txt
index 41208b2..95c55cf 100644
--- a/tests_reg/test/ns_regression/CMakeLists.txt
+++ b/tests_reg/test/ns_regression/CMakeLists.txt
@@ -41,6 +41,7 @@
     INTERFACE
         DOMAIN_NS=1
         $<$<BOOL:${CONFIG_TFM_ERPC_TEST_FRAMEWORK}>:CONFIG_TFM_ERPC_TEST_FRAMEWORK=1>
+        $<$<BOOL:${USE_STDIO}>:USE_STDIO>
 )
 
 target_link_libraries(tfm_test_framework_ns
diff --git a/tests_reg/test/secure_fw/suites/nsid/non_secure/nsid_svc_handler.h b/tests_reg/test/secure_fw/suites/nsid/non_secure/nsid_svc_handler.h
old mode 100755
new mode 100644
index 65621fd..2208c2f
--- a/tests_reg/test/secure_fw/suites/nsid/non_secure/nsid_svc_handler.h
+++ b/tests_reg/test/secure_fw/suites/nsid/non_secure/nsid_svc_handler.h
@@ -9,7 +9,6 @@
 #define __NSID_SVC_HANDLER_H__
 
 #include <stdint.h>
-// #include <stdio.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/tests_reg/test/secure_fw/suites/ps/non_secure/psa_ps_ns_interface_testsuite.c b/tests_reg/test/secure_fw/suites/ps/non_secure/psa_ps_ns_interface_testsuite.c
index 4e8b9d1..1731db7 100644
--- a/tests_reg/test/secure_fw/suites/ps/non_secure/psa_ps_ns_interface_testsuite.c
+++ b/tests_reg/test/secure_fw/suites/ps/non_secure/psa_ps_ns_interface_testsuite.c
@@ -7,7 +7,6 @@
 
 #include "ps_ns_tests.h"
 
-#include <stdio.h>
 #include <string.h>
 
 #include "config_tfm.h"
diff --git a/tests_reg/test/secure_fw/suites/ps/secure/ps_rollback_protection_testsuite.c b/tests_reg/test/secure_fw/suites/ps/secure/ps_rollback_protection_testsuite.c
index 2d37b64..25e9738 100644
--- a/tests_reg/test/secure_fw/suites/ps/secure/ps_rollback_protection_testsuite.c
+++ b/tests_reg/test/secure_fw/suites/ps/secure/ps_rollback_protection_testsuite.c
@@ -7,7 +7,6 @@
 
 #include "ps_tests.h"
 
-#include <stdio.h>
 #include <string.h>
 
 #include "nv_counters/ps_nv_counters.h"
diff --git a/tests_reg/test/secure_fw/suites/ps/secure/psa_ps_s_interface_testsuite.c b/tests_reg/test/secure_fw/suites/ps/secure/psa_ps_s_interface_testsuite.c
index db912b4..9bad008 100644
--- a/tests_reg/test/secure_fw/suites/ps/secure/psa_ps_s_interface_testsuite.c
+++ b/tests_reg/test/secure_fw/suites/ps/secure/psa_ps_s_interface_testsuite.c
@@ -7,7 +7,6 @@
 
 #include "ps_tests.h"
 
-#include <stdio.h>
 #include <string.h>
 
 #include "config_tfm.h"
diff --git a/tests_reg/test/secure_fw/suites/ps/secure/psa_ps_s_reliability_testsuite.c b/tests_reg/test/secure_fw/suites/ps/secure/psa_ps_s_reliability_testsuite.c
index 481a7a1..a807017 100644
--- a/tests_reg/test/secure_fw/suites/ps/secure/psa_ps_s_reliability_testsuite.c
+++ b/tests_reg/test/secure_fw/suites/ps/secure/psa_ps_s_reliability_testsuite.c
@@ -7,7 +7,6 @@
 
 #include "ps_tests.h"
 
-#include <stdio.h>
 #include <string.h>
 
 #include "psa/protected_storage.h"
diff --git a/tests_reg/test/secure_fw/suites/qcbor/non_secure/qcbor_ns_testsuite.c b/tests_reg/test/secure_fw/suites/qcbor/non_secure/qcbor_ns_testsuite.c
index b6877fd..cc46b19 100644
--- a/tests_reg/test/secure_fw/suites/qcbor/non_secure/qcbor_ns_testsuite.c
+++ b/tests_reg/test/secure_fw/suites/qcbor/non_secure/qcbor_ns_testsuite.c
@@ -5,8 +5,8 @@
  *
  */
 
+#include <stddef.h>
 #include "qcbor_ns_tests.h"
-#include <stdio.h>
 #include "run_tests.h"
 
 /*
diff --git a/tests_reg/test/secure_fw/suites/spm/ipc/non_secure/ipc_ns_interface_testsuite.c b/tests_reg/test/secure_fw/suites/spm/ipc/non_secure/ipc_ns_interface_testsuite.c
index 0452029..09b14b5 100644
--- a/tests_reg/test/secure_fw/suites/spm/ipc/non_secure/ipc_ns_interface_testsuite.c
+++ b/tests_reg/test/secure_fw/suites/spm/ipc/non_secure/ipc_ns_interface_testsuite.c
@@ -5,7 +5,6 @@
  *
  */
 
-#include <stdio.h>
 #include "ipc_ns_tests.h"
 #include "psa/client.h"
 #include "psa/framework_feature.h"
diff --git a/tests_reg/test/secure_fw/suites/spm/sfn/sfn_backend_tests.c b/tests_reg/test/secure_fw/suites/spm/sfn/sfn_backend_tests.c
index fc316b5..4eeb2b3 100644
--- a/tests_reg/test/secure_fw/suites/spm/sfn/sfn_backend_tests.c
+++ b/tests_reg/test/secure_fw/suites/spm/sfn/sfn_backend_tests.c
@@ -5,7 +5,6 @@
  *
  */
 
-#include <stdio.h>
 #include <string.h>
 
 #include "sfn_backend_tests.h"
diff --git a/tests_reg/test/secure_fw/suites/t_cose/non_secure/t_cose_ns_testsuite.c b/tests_reg/test/secure_fw/suites/t_cose/non_secure/t_cose_ns_testsuite.c
index ab60df8..0fadc94 100644
--- a/tests_reg/test/secure_fw/suites/t_cose/non_secure/t_cose_ns_testsuite.c
+++ b/tests_reg/test/secure_fw/suites/t_cose/non_secure/t_cose_ns_testsuite.c
@@ -5,8 +5,8 @@
  *
  */
 
+#include <stddef.h>
 #include "t_cose_ns_tests.h"
-#include <stdio.h>
 #include "run_tests.h"
 
 /*