diff --git a/infra/config/generated/builders/ci/Cast Linux Debug/properties.json b/infra/config/generated/builders/ci/Cast Linux Debug/properties.json
index 07adf83b2de7f5..9702adcdec58d1 100644
--- a/infra/config/generated/builders/ci/Cast Linux Debug/properties.json	
+++ b/infra/config/generated/builders/ci/Cast Linux Debug/properties.json	
@@ -1,4 +1,51 @@
 {
+  "$build/chromium_tests_builder_config": {
+    "builder_config": {
+      "builder_db": {
+        "entries": [
+          {
+            "builder_id": {
+              "bucket": "ci",
+              "builder": "Cast Linux Debug",
+              "project": "chromium"
+            },
+            "builder_spec": {
+              "build_gs_bucket": "chromium-linux-archive",
+              "builder_group": "chromium.linux",
+              "execution_mode": "COMPILE_AND_TEST",
+              "legacy_chromium_config": {
+                "apply_configs": [
+                  "mb"
+                ],
+                "build_config": "Debug",
+                "config": "chromium_clang",
+                "target_bits": 64
+              },
+              "legacy_gclient_config": {
+                "apply_configs": [
+                  "enable_reclient"
+                ],
+                "config": "chromium"
+              }
+            }
+          }
+        ]
+      },
+      "builder_ids": [
+        {
+          "bucket": "ci",
+          "builder": "Cast Linux Debug",
+          "project": "chromium"
+        }
+      ],
+      "mirroring_builder_group_and_names": [
+        {
+          "builder": "cast_shell_linux_dbg",
+          "group": "tryserver.chromium.linux"
+        }
+      ]
+    }
+  },
   "$build/reclient": {
     "instance": "rbe-chromium-trusted",
     "jobs": 500,
diff --git a/infra/config/generated/builders/try/cast_shell_linux_dbg/properties.json b/infra/config/generated/builders/try/cast_shell_linux_dbg/properties.json
index 19e0479dcafb80..37d151089b9bb3 100644
--- a/infra/config/generated/builders/try/cast_shell_linux_dbg/properties.json
+++ b/infra/config/generated/builders/try/cast_shell_linux_dbg/properties.json
@@ -1,4 +1,45 @@
 {
+  "$build/chromium_tests_builder_config": {
+    "builder_config": {
+      "builder_db": {
+        "entries": [
+          {
+            "builder_id": {
+              "bucket": "ci",
+              "builder": "Cast Linux Debug",
+              "project": "chromium"
+            },
+            "builder_spec": {
+              "build_gs_bucket": "chromium-linux-archive",
+              "builder_group": "chromium.linux",
+              "execution_mode": "COMPILE_AND_TEST",
+              "legacy_chromium_config": {
+                "apply_configs": [
+                  "mb"
+                ],
+                "build_config": "Debug",
+                "config": "chromium_clang",
+                "target_bits": 64
+              },
+              "legacy_gclient_config": {
+                "apply_configs": [
+                  "enable_reclient"
+                ],
+                "config": "chromium"
+              }
+            }
+          }
+        ]
+      },
+      "builder_ids": [
+        {
+          "bucket": "ci",
+          "builder": "Cast Linux Debug",
+          "project": "chromium"
+        }
+      ]
+    }
+  },
   "$build/goma": {
     "enable_ats": true,
     "rpc_extra_params": "?prod",
diff --git a/infra/config/subprojects/chromium/ci/chromium.linux.star b/infra/config/subprojects/chromium/ci/chromium.linux.star
index d81cde19cea6eb..7a34ea05b629dc 100644
--- a/infra/config/subprojects/chromium/ci/chromium.linux.star
+++ b/infra/config/subprojects/chromium/ci/chromium.linux.star
@@ -58,6 +58,23 @@ ci.builder(
 ci.builder(
     name = "Cast Linux Debug",
     branch_selector = branches.STANDARD_MILESTONE,
+    builder_spec = builder_config.builder_spec(
+        gclient_config = builder_config.gclient_config(
+            config = "chromium",
+            apply_configs = [
+                "enable_reclient",
+            ],
+        ),
+        chromium_config = builder_config.chromium_config(
+            config = "chromium_clang",
+            apply_configs = [
+                "mb",
+            ],
+            build_config = builder_config.build_config.DEBUG,
+            target_bits = 64,
+        ),
+        build_gs_bucket = "chromium-linux-archive",
+    ),
     console_view_entry = consoles.console_view_entry(
         category = "cast",
         short_name = "dbg",
diff --git a/infra/config/subprojects/chromium/try/tryserver.chromium.linux.star b/infra/config/subprojects/chromium/try/tryserver.chromium.linux.star
index f505d52bd2e507..7e558485dcd12e 100644
--- a/infra/config/subprojects/chromium/try/tryserver.chromium.linux.star
+++ b/infra/config/subprojects/chromium/try/tryserver.chromium.linux.star
@@ -47,6 +47,9 @@ try_.builder(
 try_.builder(
     name = "cast_shell_linux_dbg",
     branch_selector = branches.STANDARD_MILESTONE,
+    mirrors = [
+        "ci/Cast Linux Debug",
+    ],
     main_list_view = "try",
     tryjob = try_.job(
         location_regexp = [