diff --git a/code/__DEFINES/_ss220.dm b/code/__DEFINES/_ss220.dm
index 0cf3257d7da9..157be2bea08b 100644
--- a/code/__DEFINES/_ss220.dm
+++ b/code/__DEFINES/_ss220.dm
@@ -1,5 +1,14 @@
 #define MODPACK_CHAT_BADGES
 
+#define SEC_LEVEL_GREEN		0
+#define SEC_LEVEL_BLUE		1
+#define SEC_LEVEL_VIOLET	2
+#define SEC_LEVEL_ORANGE	3
+#define SEC_LEVEL_RED		4
+#define SEC_LEVEL_GAMMA		5
+#define SEC_LEVEL_EPSILON	6
+#define SEC_LEVEL_DELTA		7
+
 // TODO: someday preferences will use TGUI and you will probably be able to move it to modular_ss220\_defines220\code\preferences_defines.dm
 /// Interacts with the toggles220 bitflag
 #define PREFTOGGLE_TOGGLE220 220
diff --git a/code/__DEFINES/misc_defines.dm b/code/__DEFINES/misc_defines.dm
index 3397cd677170..2f95a33c6e64 100644
--- a/code/__DEFINES/misc_defines.dm
+++ b/code/__DEFINES/misc_defines.dm
@@ -4,12 +4,10 @@
 //Security levels
 #define SEC_LEVEL_GREEN		0
 #define SEC_LEVEL_BLUE		1
-#define SEC_LEVEL_VIOLET	2
-#define SEC_LEVEL_ORANGE	3
-#define SEC_LEVEL_RED		4
-#define SEC_LEVEL_GAMMA		5
-#define SEC_LEVEL_EPSILON	6
-#define SEC_LEVEL_DELTA		7
+#define SEC_LEVEL_RED		2
+#define SEC_LEVEL_GAMMA		3
+#define SEC_LEVEL_EPSILON	4
+#define SEC_LEVEL_DELTA		5
 
 //Click cooldowns, in tenths of a second
 #define CLICK_CD_MELEE 8
diff --git a/modular_ss220/modular_ss220.dme b/modular_ss220/modular_ss220.dme
index fbb18418eb6d..b706d43c3dfe 100644
--- a/modular_ss220/modular_ss220.dme
+++ b/modular_ss220/modular_ss220.dme
@@ -108,3 +108,8 @@
  ---------------------------------------------------------------------*/
 
 // #include "crit_rework/_crit_rework.dme"
+
+// --- TESTING --- //
+#ifdef UNIT_TESTS
+#include "unit_tests/_unit_tests.dme"
+#endif
diff --git a/modular_ss220/unit_tests/_unit_tests.dm b/modular_ss220/unit_tests/_unit_tests.dm
new file mode 100644
index 000000000000..8f2f60e3a195
--- /dev/null
+++ b/modular_ss220/unit_tests/_unit_tests.dm
@@ -0,0 +1,4 @@
+/datum/modpack/unit_tests
+	name = "Тестирование"
+	desc = "Здесь тестируется все, что стоит протестировать"
+	author = "Maxiemar"
diff --git a/modular_ss220/unit_tests/_unit_tests.dme b/modular_ss220/unit_tests/_unit_tests.dme
new file mode 100644
index 000000000000..914dcab04345
--- /dev/null
+++ b/modular_ss220/unit_tests/_unit_tests.dme
@@ -0,0 +1,3 @@
+#include "_unit_tests.dm"
+
+#include "code/security_levels.dm"
diff --git a/modular_ss220/unit_tests/code/security_levels.dm b/modular_ss220/unit_tests/code/security_levels.dm
new file mode 100644
index 000000000000..fe23d671bcc2
--- /dev/null
+++ b/modular_ss220/unit_tests/code/security_levels.dm
@@ -0,0 +1,19 @@
+/datum/unit_test/security_levels
+
+/datum/unit_test/security_levels/Run()
+	security_levels_order()
+
+/datum/unit_test/security_levels/proc/security_levels_order()
+	var/list/expected = list(
+		new /datum/security_level/green,
+		new /datum/security_level/blue,
+		new /datum/security_level/violet,
+		new /datum/security_level/orange,
+		new /datum/security_level/red,
+		new /datum/security_level/gamma,
+		new /datum/security_level/epsilon,
+		new /datum/security_level/delta
+	)
+	var/list/actual = SSsecurity_level.available_levels
+	if(!compare_list(expected, actual))
+		Fail("Security levels order is invalid.\nExpected: [expected]\nActual: [actual]")