diff --git a/auto_tests/TCP_test.c b/auto_tests/TCP_test.c
index 8e75fae0..25827df3 100644
--- a/auto_tests/TCP_test.c
+++ b/auto_tests/TCP_test.c
@@ -14,6 +14,8 @@
 
 #include "../toxcore/util.h"
 
+#include "helpers.h"
+
 #if defined(_WIN32) || defined(__WIN32__) || defined (WIN32)
 #define c_sleep(x) Sleep(1*x)
 #else
@@ -489,14 +491,6 @@ START_TEST(test_client_invalid)
 }
 END_TEST
 
-#define DEFTESTCASE(NAME) \
-    TCase *tc_##NAME = tcase_create(#NAME); \
-    tcase_add_test(tc_##NAME, test_##NAME); \
-    suite_add_tcase(s, tc_##NAME);
-
-#define DEFTESTCASE_SLOW(NAME, TIMEOUT) \
-    DEFTESTCASE(NAME) \
-    tcase_set_timeout(tc_##NAME, TIMEOUT);
 Suite *TCP_suite(void)
 {
     Suite *s = suite_create("TCP");
diff --git a/auto_tests/assoc_test.c b/auto_tests/assoc_test.c
index 5f496ece..b377cadf 100644
--- a/auto_tests/assoc_test.c
+++ b/auto_tests/assoc_test.c
@@ -1,4 +1,3 @@
-
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
@@ -14,6 +13,8 @@
 
 #include <check.h>
 
+#include "helpers.h"
+
 START_TEST(test_basics)
 {
     /* TODO: real test */
@@ -132,15 +133,6 @@ START_TEST(test_fillup)
 }
 END_TEST
 
-#define DEFTESTCASE(NAME) \
-    TCase *tc_##NAME = tcase_create(#NAME); \
-    tcase_add_test(tc_##NAME, test_##NAME); \
-    suite_add_tcase(s, tc_##NAME);
-
-#define DEFTESTCASE_SLOW(NAME, TIMEOUT) \
-    DEFTESTCASE(NAME) \
-    tcase_set_timeout(tc_##NAME, TIMEOUT);
-
 Suite *Assoc_suite(void)
 {
     Suite *s = suite_create("Assoc");
diff --git a/auto_tests/crypto_test.c b/auto_tests/crypto_test.c
index 252f7275..2fb08b8b 100644
--- a/auto_tests/crypto_test.c
+++ b/auto_tests/crypto_test.c
@@ -10,6 +10,8 @@
 #include <stdlib.h>
 #include <time.h>
 
+#include "helpers.h"
+
 void rand_bytes(uint8_t *b, size_t blen)
 {
     size_t i;
@@ -270,16 +272,6 @@ START_TEST(test_large_data_symmetric)
 }
 END_TEST
 
-
-#define DEFTESTCASE(NAME) \
-    TCase *NAME = tcase_create(#NAME); \
-    tcase_add_test(NAME, test_##NAME); \
-    suite_add_tcase(s, NAME);
-
-#define DEFTESTCASE_SLOW(NAME, TIMEOUT) \
-    DEFTESTCASE(NAME) \
-    tcase_set_timeout(NAME, TIMEOUT);
-
 Suite *crypto_suite(void)
 {
     Suite *s = suite_create("Crypto");
diff --git a/auto_tests/helpers.h b/auto_tests/helpers.h
new file mode 100644
index 00000000..30fb7c8c
--- /dev/null
+++ b/auto_tests/helpers.h
@@ -0,0 +1,15 @@
+#ifndef TOXCORE_TEST_HELPERS_H
+#define TOXCORE_TEST_HELPERS_H
+
+#include <check.h>
+
+#define DEFTESTCASE(NAME)                   \
+    TCase *tc_##NAME = tcase_create(#NAME); \
+    tcase_add_test(tc_##NAME, test_##NAME); \
+    suite_add_tcase(s, tc_##NAME);
+
+#define DEFTESTCASE_SLOW(NAME, TIMEOUT) \
+    DEFTESTCASE(NAME) \
+    tcase_set_timeout(tc_##NAME, TIMEOUT);
+
+#endif // TOXCORE_TEST_HELPERS_H
\ No newline at end of file
diff --git a/auto_tests/messenger_test.c b/auto_tests/messenger_test.c
index 7ab7d674..3024ed1a 100644
--- a/auto_tests/messenger_test.c
+++ b/auto_tests/messenger_test.c
@@ -21,6 +21,8 @@
 #include <string.h>
 #include <check.h>
 
+#include "helpers.h"
+
 #define REALLY_BIG_NUMBER ((1) << (sizeof(uint16_t) * 7))
 #define STRINGS_EQUAL(X, Y) (strcmp(X, Y) == 0)
 
@@ -298,11 +300,6 @@ START_TEST(test_messenger_state_saveloadsave)
 }
 END_TEST
 
-#define DEFTESTCASE(NAME) \
-    TCase *tc_##NAME = tcase_create(#NAME); \
-    tcase_add_test(tc_##NAME, test_##NAME); \
-    suite_add_tcase(s, tc_##NAME);
-
 Suite *messenger_suite(void)
 {
     Suite *s = suite_create("Messenger");
diff --git a/auto_tests/network_test.c b/auto_tests/network_test.c
index afd90e7a..9d07fbb4 100644
--- a/auto_tests/network_test.c
+++ b/auto_tests/network_test.c
@@ -11,6 +11,8 @@
 
 #include "../toxcore/network.h"
 
+#include "helpers.h"
+
 START_TEST(test_addr_resolv_localhost)
 {
 #ifdef __CYGWIN__
@@ -141,11 +143,6 @@ START_TEST(test_struct_sizes)
 }
 END_TEST
 
-#define DEFTESTCASE(NAME) \
-    TCase *tc_##NAME = tcase_create(#NAME); \
-    tcase_add_test(tc_##NAME, test_##NAME); \
-    suite_add_tcase(s, tc_##NAME);
-
 Suite *network_suite(void)
 {
     Suite *s = suite_create("Network");
diff --git a/auto_tests/onion_test.c b/auto_tests/onion_test.c
index 2394e03d..ed297022 100644
--- a/auto_tests/onion_test.c
+++ b/auto_tests/onion_test.c
@@ -14,6 +14,8 @@
 #include "../toxcore/onion_client.h"
 #include "../toxcore/util.h"
 
+#include "helpers.h"
+
 #if defined(_WIN32) || defined(__WIN32__) || defined (WIN32)
 #define c_sleep(x) Sleep(1*x)
 #else
@@ -335,14 +337,6 @@ START_TEST(test_announce)
 }
 END_TEST
 
-#define DEFTESTCASE(NAME) \
-    TCase *tc_##NAME = tcase_create(#NAME); \
-    tcase_add_test(tc_##NAME, test_##NAME); \
-    suite_add_tcase(s, tc_##NAME);
-
-#define DEFTESTCASE_SLOW(NAME, TIMEOUT) \
-    DEFTESTCASE(NAME) \
-    tcase_set_timeout(tc_##NAME, TIMEOUT);
 Suite *onion_suite(void)
 {
     Suite *s = suite_create("Onion");
diff --git a/auto_tests/skeleton_test.c b/auto_tests/skeleton_test.c
index 89ef1b8b..27c9123a 100644
--- a/auto_tests/skeleton_test.c
+++ b/auto_tests/skeleton_test.c
@@ -9,6 +9,8 @@
 #include <stdlib.h>
 #include <time.h>
 
+#include "helpers.h"
+
 /*
 #include "../<stuff to test>"
 */
@@ -20,12 +22,6 @@ START_TEST(test_creativetestnamegoeshere)
 }
 END_TEST
 
-
-#define DEFTESTCASE(NAME) \
-    TCase *tc_##NAME = tcase_create(#NAME); \
-    tcase_add_test(tc_##NAME, test_##NAME); \
-    suite_add_tcase(s, tc_##NAME);
-
 Suite *creativesuitenamegoeshere_suite(void)
 {
     Suite *s = suite_create("creativesuitedescritptiongoeshere");
diff --git a/auto_tests/tox_test.c b/auto_tests/tox_test.c
index 43fb7a1c..f765fcd3 100644
--- a/auto_tests/tox_test.c
+++ b/auto_tests/tox_test.c
@@ -12,6 +12,8 @@
 
 #include "../toxcore/tox.h"
 
+#include "helpers.h"
+
 #if defined(_WIN32) || defined(__WIN32__) || defined (WIN32)
 #define c_sleep(x) Sleep(1*x)
 #else
@@ -360,14 +362,6 @@ loop_top:
 }
 END_TEST
 
-#define DEFTESTCASE(NAME) \
-    TCase *tc_##NAME = tcase_create(#NAME); \
-    tcase_add_test(tc_##NAME, test_##NAME); \
-    suite_add_tcase(s, tc_##NAME);
-
-#define DEFTESTCASE_SLOW(NAME, TIMEOUT) \
-    DEFTESTCASE(NAME) \
-    tcase_set_timeout(tc_##NAME, TIMEOUT);
 Suite *tox_suite(void)
 {
     Suite *s = suite_create("Tox");
diff --git a/auto_tests/toxav_basic_test.c b/auto_tests/toxav_basic_test.c
index 57685bfc..c6481366 100644
--- a/auto_tests/toxav_basic_test.c
+++ b/auto_tests/toxav_basic_test.c
@@ -16,6 +16,8 @@
 #include "../toxcore/crypto_core.h"
 #include "../toxav/toxav.h"
 
+#include "helpers.h"
+
 #if defined(_WIN32) || defined(__WIN32__) || defined (WIN32)
 #define c_sleep(x) Sleep(1*x)
 #else
@@ -214,7 +216,6 @@ case 3: /* Wait for Both to have status ended */\
 if (status_control.Alice.status == Ended && status_control.Bob.status == Ended) running = 0; break; } c_sleep(20); } } printf("\n");
 
 START_TEST(test_AV_flows)
-// int test_AV_flows()
 {
     long long unsigned int cur_time = time(NULL);
     Tox *bootstrap_node = tox_new(0);
@@ -574,10 +575,7 @@ Suite *tox_suite(void)
 {
     Suite *s = suite_create("ToxAV");
 
-    TCase *tc_av_flows = tcase_create("AV_flows");
-    tcase_add_test(tc_av_flows, test_AV_flows);
-    tcase_set_timeout(tc_av_flows, 200);
-    suite_add_tcase(s, tc_av_flows);
+    DEFTESTCASE_SLOW(AV_flows, 200);
 
     return s;
 }