diff --git a/.github/actions/build/action.yaml b/.github/actions/build/action.yaml
index 32b5d5d43d3..cd60ee1c392 100644
--- a/.github/actions/build/action.yaml
+++ b/.github/actions/build/action.yaml
@@ -4,6 +4,9 @@ inputs:
   targets:
     description: "List of ninja targets for Cobalt build."
     required: true
+  test_root_target:
+    description: "The root target from which to deduce what tests to run."
+    required: true
   upload_on_host_test_artifacts:
     description: "Indicates if on-host test artifacts should be uploaded."
     required: true
@@ -50,7 +53,7 @@ runs:
       - name: Calculate test targets
         if: inputs.upload_on_host_test_artifacts == 'true' || inputs.upload_on_device_test_artifacts == 'true'
         env:
-          ROOT_TARGET: //url:url_unittests
+          ROOT_TARGET: ${{ inputs.test_root_target }}
           TEST_TARGETS_JSON_FILE: test_targets.json
         run: |
           set -x
diff --git a/.github/config/chromium_linux.json b/.github/config/chromium_linux.json
index 90b2df92bfb..bd5fa86ca2c 100644
--- a/.github/config/chromium_linux.json
+++ b/.github/config/chromium_linux.json
@@ -3,6 +3,7 @@
     "platforms": [
       "chromium_linux-x64x11"
     ],
+    "test_root_target": "//content/shell:content_shell",
     "test_on_host": true,
     "targets": [
         "content_shell"
diff --git a/.github/config/linux.json b/.github/config/linux.json
index 059984dca42..19b74dfd13f 100644
--- a/.github/config/linux.json
+++ b/.github/config/linux.json
@@ -1,5 +1,6 @@
 {
     "docker_service": "linux",
+    "test_root_target": "//cobalt:cobalt",
     "test_on_host": true,
     "platforms": [
       "linux-x64x11"
diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 1c907ba578b..cb1d30e2df3 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -70,6 +70,11 @@ jobs:
         run: |
           includes=$(cat ${GITHUB_WORKSPACE}/.github/config/${{ inputs.platform }}.json | jq -c '.includes')
           echo "includes=${includes}" >> $GITHUB_ENV
+      - id: set-test-root-target
+        shell: bash
+        run: |
+          test_root_target=$(cat ${GITHUB_WORKSPACE}/.github/config/${{ inputs.platform }}.json | jq -rc '.test_root_target')
+          echo "test_root_target=${test_root_target}" >> $GITHUB_ENV
       - id: set-test-on-host
         shell: bash
         run: |
@@ -90,6 +95,7 @@ jobs:
       targets: ${{ env.targets }}
       includes: ${{ env.includes }}
       docker_service: ${{ env.docker_service }}
+      test_root_target: ${{ env.test_root_target }}
       test_on_host: ${{ env.test_on_host }}
       test_on_device: ${{ env.test_on_device }}
 
@@ -168,6 +174,7 @@ jobs:
         with:
           targets: ${{ needs.initialize.outputs.targets }}
           test_artifacts_key: ${{ env.TEST_ARTIFACTS_KEY }}
+          test_root_target: ${{ needs.initialize.outputs.test_root_target }}
           upload_on_host_test_artifacts: ${{ matrix.config == 'devel' && needs.initialize.outputs.test_on_host }}
           upload_on_device_test_artifacts: ${{ matrix.config == 'devel' && needs.initialize.outputs.test_on_device }}