diff --git a/test/tarantool-c-tests/fix-yield-c-hook.test.c b/test/tarantool-c-tests/fix-yield-c-hook.test.c
index 0e9fa5d6bd..aff4a37175 100644
--- a/test/tarantool-c-tests/fix-yield-c-hook.test.c
+++ b/test/tarantool-c-tests/fix-yield-c-hook.test.c
@@ -3,8 +3,6 @@
 #include "test.h"
 #include "utils.h"
 
-#define UNUSED(x) ((void)(x))
-
 /*
  * This test demonstrates LuaJIT's incorrect behaviour, when
  * calling `lua_yield()` inside a C hook.
diff --git a/test/tarantool-c-tests/gh-8594-sysprof-ffunc-crash.test.c b/test/tarantool-c-tests/gh-8594-sysprof-ffunc-crash.test.c
index 769d333a87..2550f43c26 100644
--- a/test/tarantool-c-tests/gh-8594-sysprof-ffunc-crash.test.c
+++ b/test/tarantool-c-tests/gh-8594-sysprof-ffunc-crash.test.c
@@ -46,8 +46,6 @@
  * * https://github.com/tarantool/tarantool/issues/9387
  */
 
-#define UNUSED(x) ((void)(x))
-
 #define MESSAGE "Canary is alive"
 #define LUACALL "local a = tostring('" MESSAGE "') return a"
 
diff --git a/test/tarantool-c-tests/lj-1168-unmarked-finalizer-tab.test.c b/test/tarantool-c-tests/lj-1168-unmarked-finalizer-tab.test.c
index 9e57efb853..2d54da8902 100644
--- a/test/tarantool-c-tests/lj-1168-unmarked-finalizer-tab.test.c
+++ b/test/tarantool-c-tests/lj-1168-unmarked-finalizer-tab.test.c
@@ -3,8 +3,6 @@
 
 #include "test.h"
 
-#define UNUSED(x) ((void)(x))
-
 /*
  * This test demonstrates LuaJIT's incorrect behaviour on
  * loading Lua chunk with cdata numbers.
diff --git a/test/tarantool-c-tests/lj-549-lua-load.test.c b/test/tarantool-c-tests/lj-549-lua-load.test.c
index 42a14be5bc..b0e94f6fe7 100644
--- a/test/tarantool-c-tests/lj-549-lua-load.test.c
+++ b/test/tarantool-c-tests/lj-549-lua-load.test.c
@@ -3,8 +3,6 @@
 
 #include "lj_def.h"
 
-#define UNUSED(x) ((void)(x))
-
 /*
  * XXX: In C language, objects with static storage duration have
  * to be initialized with constant expressions or with aggregate
diff --git a/test/tarantool-c-tests/misclib-sysprof-capi.test.c b/test/tarantool-c-tests/misclib-sysprof-capi.test.c
index 21e40d22d1..f0dc44057e 100644
--- a/test/tarantool-c-tests/misclib-sysprof-capi.test.c
+++ b/test/tarantool-c-tests/misclib-sysprof-capi.test.c
@@ -18,8 +18,6 @@
 /* Need for skipcond for OS and ARCH. */
 #include "lj_arch.h"
 
-#define UNUSED(x) ((void)(x))
-
 /* --- utils -------------------------------------------------- */
 
 #define SYSPROF_INTERVAL_DEFAULT 100
diff --git a/test/tarantool-c-tests/test.h b/test/tarantool-c-tests/test.h
index 3b22fb9285..d5966e4047 100644
--- a/test/tarantool-c-tests/test.h
+++ b/test/tarantool-c-tests/test.h
@@ -4,6 +4,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#ifndef UNUSED
+#define UNUSED(x) ((void)(x))
+#endif
+
 /*
  * Test module, based on TAP 14 specification [1].
  * [1]: https://testanything.org/tap-version-14-specification.html
diff --git a/test/tarantool-c-tests/unit-tap.test.c b/test/tarantool-c-tests/unit-tap.test.c
index ca0709ca94..1f9a37ef5a 100644
--- a/test/tarantool-c-tests/unit-tap.test.c
+++ b/test/tarantool-c-tests/unit-tap.test.c
@@ -1,7 +1,5 @@
 #include "test.h"
 
-#define UNUSED(x) ((void)(x))
-
 static int test_ok(void *test_state)
 {
 	UNUSED(test_state);