diff --git a/sw/device/lib/testing/test_framework/BUILD b/sw/device/lib/testing/test_framework/BUILD
index 0b098b92b6b85..f95855df841ce 100644
--- a/sw/device/lib/testing/test_framework/BUILD
+++ b/sw/device/lib/testing/test_framework/BUILD
@@ -84,6 +84,7 @@ cc_library(
 
 OTTF_REGION_ALIAS = opentitan_select_top(
     {
+        "darjeeling": {"@@OTTF_REGION_ALIAS@@": "ctn"},
     },
     # Default configuration:
     {"@@OTTF_REGION_ALIAS@@": "eflash"},
diff --git a/sw/device/lib/testing/test_rom/BUILD b/sw/device/lib/testing/test_rom/BUILD
index bb59b1ead1b81..e818082a900ab 100644
--- a/sw/device/lib/testing/test_rom/BUILD
+++ b/sw/device/lib/testing/test_rom/BUILD
@@ -23,6 +23,10 @@ ld_library(
         "@@TOP_MEMORY_LD@@": "$(location //hw/top:top_ld)",
     } | opentitan_select_top(
         {
+            "darjeeling": {
+                "@@TEST_ROM_REGION@@": "rom0",
+                "@@TEST_CODE_REGION@@": "ctn",
+            },
         },
         # Default configuration:
         {