lets see if this works

.github/workflows/workflow-run.yml

@@ -0,0 +1,58 @@
+name: workflow-run-test
+
+on:
+  workflow_run:
+    workflows: ["downstreams"] # Use the name of your main workflow here
+    types:
+      - completed
+
+jobs:
+  unit-test-terraform-google-conversion:
+    # This job will run if the main workflow was successful.
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    runs-on: ubuntu-22.04
+
+    steps:
+      - name: Download built artifacts (TGC)
+        uses: actions/download-artifact@v2
+        with:
+          name: artifact-terraform-google-conversion
+          path: artifacts-tgc
+
+      - name: Download built artifacts (TPGB)
+        uses: actions/download-artifact@v2
+        with:
+          name: artifact-terraform-google-conversion
+          path: artifacts-tpgb
+
+      - name: Unzip the artifacts and delete the zip
+        run: |
+          unzip artifacts-tgc/output.zip -d ./tgc
+          unzip artifacts-tpgb/output.zip -d ./tgc
+          rm artifacts-tgc/output.zip
+          rm artifacts-tpgb/output.zip
+
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: '^1.19'
+
+      - name: Cache Go modules and build cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-test-terraform-google-conversion-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-test-terraform-google-conversion-${{ hashFiles('**/go.sum') }}
+            ${{ runner.os }}-test-terraform-google-conversion-
+
+      - name: Build Terraform Google Conversion
+        run: |
+          go mod edit -replace=github.com/hashicorp/terraform-provider-google-beta=../tpgb
+          go mod tidy
+          make build
+
+      - name: Run Unit Tests
+        run: |
+          make test