diff --git a/tests/include/test.h b/tests/include/test.h
index bf8c4f7bd..88ac16d93 100644
--- a/tests/include/test.h
+++ b/tests/include/test.h
@@ -29,6 +29,8 @@
 
 #define NON_ZERO (0xf000baaa)
 
+#define MOCK_FD (0x10ec)
+
 /*
  * Having this as function allows to set a breakpoint on the address,
  * as it has a named symbol associated with the address number.
diff --git a/tests/lifecycle.c b/tests/lifecycle.c
index 282a6b5d9..c37f3b99a 100644
--- a/tests/lifecycle.c
+++ b/tests/lifecycle.c
@@ -370,18 +370,16 @@ void linux_spi_probe_lifecycle_test_success(void **state)
 #endif
 }
 
-#define REALTEK_MST_MOCK_FD 0x10ec
-
 static int realtek_mst_open(void *state, const char *pathname, int flags)
 {
 	assert_string_equal(pathname, "/dev/i2c-254");
 	assert_int_equal(flags & O_RDWR, O_RDWR);
-	return REALTEK_MST_MOCK_FD;
+	return MOCK_FD;
 }
 
 static int realtek_mst_ioctl(void *state, int fd, unsigned long request, va_list args)
 {
-	assert_int_equal(fd, REALTEK_MST_MOCK_FD);
+	assert_int_equal(fd, MOCK_FD);
 	assert_int_equal(request, I2C_SLAVE);
 	/* Only access to I2C address 0x4a is expected */
 	unsigned long addr = va_arg(args, unsigned long);
@@ -392,14 +390,14 @@ static int realtek_mst_ioctl(void *state, int fd, unsigned long request, va_list
 
 static int realtek_mst_read(void *state, int fd, void *buf, size_t sz)
 {
-	assert_int_equal(fd, REALTEK_MST_MOCK_FD);
+	assert_int_equal(fd, MOCK_FD);
 	assert_int_equal(sz, 1);
 	return sz;
 }
 
 static int realtek_mst_write(void *state, int fd, const void *buf, size_t sz)
 {
-	assert_int_equal(fd, REALTEK_MST_MOCK_FD);
+	assert_int_equal(fd, MOCK_FD);
 	const LargestIntegralType accepted_sizes[] = {1, 2};
 	assert_in_set(sz, accepted_sizes, ARRAY_SIZE(accepted_sizes));
 	return sz;
diff --git a/tests/tests.c b/tests/tests.c
index 33b2ea207..f32c14dab 100644
--- a/tests/tests.c
+++ b/tests/tests.c
@@ -79,7 +79,7 @@ int __wrap_open(const char *pathname, int flags)
 	LOG_ME;
 	if (get_io() && get_io()->open)
 		return get_io()->open(get_io()->state, pathname, flags);
-	return NON_ZERO;
+	return MOCK_FD;
 }
 
 int __wrap_open64(const char *pathname, int flags)
@@ -87,7 +87,7 @@ int __wrap_open64(const char *pathname, int flags)
 	LOG_ME;
 	if (get_io() && get_io()->open)
 		return get_io()->open(get_io()->state, pathname, flags);
-	return NON_ZERO;
+	return MOCK_FD;
 }
 
 int __wrap___open64_2(const char *pathname, int flags)
@@ -95,7 +95,7 @@ int __wrap___open64_2(const char *pathname, int flags)
 	LOG_ME;
 	if (get_io() && get_io()->open)
 		return get_io()->open(get_io()->state, pathname, flags);
-	return NON_ZERO;
+	return MOCK_FD;
 }
 
 int __wrap_ioctl(int fd, unsigned long int request, ...)