maybe this-a-work?

code/modules/unit_tests/_unit_tests.dm

@@ -11,6 +11,7 @@
 #include "log_format.dm"
 #include "map_templates.dm"
 #include "map_tests.dm"
+#include "origin_tech.dm"
 #include "purchase_reference_test.dm"
 #include "reagent_id_typos.dm"
 #include "rustg_version.dm"

code/modules/unit_tests/origin_tech.dm

@@ -0,0 +1,11 @@
+/datum/unit_test/origin_tech_test/Run()
+	var/regex/nums = regex("^\[0-9]+")
+	for(var/tpath in subtypesof(/obj/item))
+    	var/obj/item/I = tpath
+    	var/tech_str = initial(I.origin_tech)
+
+    	var/list/tech_list = params2list(tech_str)
+
+    	for(var/k in tech_list)
+    	if(length(nums.Replace(tech_list[k], "")) > 0)
+        	Fail("Invalid origin tech for [tpath]: [tech_str]")