diff --git a/.github/workflows/dafny-interop.yml b/.github/workflows/dafny-interop.yml
index da395dbfa..2dde2f744 100644
--- a/.github/workflows/dafny-interop.yml
+++ b/.github/workflows/dafny-interop.yml
@@ -4,6 +4,21 @@
 name: Dafny Interoperability Test
 
 on:
+  workflow_call:
+    inputs:
+      mpl-dafny:
+        description: "The Dafny version to compile the MPL with (4.2.0, nightly-latest, etc..)"
+        required: true
+        type: string
+      mpl-commit:
+        description: "The MPL branch/commit to use"
+        required: false
+        default: "main"
+        type: string
+      dbesdk-dafny:
+        description: "The Dafny version to compile the DBESDK with (4.2.0, nightly-latest, etc..)"
+        required: true
+        type: string
   workflow_dispatch:
     inputs:
       mpl-dafny:
@@ -67,3 +82,9 @@ jobs:
       mpl-dafny: ${{inputs.mpl-dafny}}
       mpl-commit: ${{inputs.mpl-commit}}
       dbesdk-dafny: ${{inputs.dbesdk-dafny}}
+  dafny-interop-go:
+    uses: ./.github/workflows/dafny_interop_go_tests.yml
+    with:
+      mpl-dafny: ${{inputs.mpl-dafny}}
+      mpl-commit: ${{inputs.mpl-commit}}
+      dbesdk-dafny: ${{inputs.dbesdk-dafny}}
diff --git a/.github/workflows/dafny_interop_go_tests.yml b/.github/workflows/dafny_interop_go_tests.yml
new file mode 100644
index 000000000..a48a133ea
--- /dev/null
+++ b/.github/workflows/dafny_interop_go_tests.yml
@@ -0,0 +1,127 @@
+# This workflow performs tests in Go with nightly latest versions for mpl or esdk.
+name: Library Go Backwards Interop Tests
+
+on:
+  workflow_call:
+    inputs:
+      mpl-dafny:
+        description: "The Dafny version to compile the MPL with (4.2.0, dafny-nightly, etc..)"
+        required: true
+        type: string
+      mpl-commit:
+        description: "The MPL commit to use"
+        required: false
+        default: "main"
+        type: string
+      dbesdk-dafny:
+        description: "The Dafny version to compile the DBESDK with (4.2.0, dafny-nightly, etc..)"
+        required: true
+        type: string
+
+jobs:
+  testGo:
+    strategy:
+      fail-fast: false
+      matrix:
+        library: [TestVectors]
+        os: [ubuntu-22.04, macos-13]
+        go-version: ["1.23", "1.24"]
+    runs-on: ${{ matrix.os }}
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - name: Setup Docker
+        if: matrix.os == 'macos-13' && matrix.library == 'TestVectors'
+        uses: douglascamata/setup-docker-macos-action@v1-alpha
+
+      - name: Setup DynamoDB Local
+        if: matrix.library == 'TestVectors'
+        uses: rrainn/dynamodb-action@v4.0.0
+        with:
+          port: 8000
+          cors: "*"
+
+      - name: Support longpaths
+        run: |
+          git config --global core.longpaths true
+
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          aws-region: us-west-2
+          role-to-assume: arn:aws:iam::370957321024:role/GitHub-CI-DDBEC-Dafny-Role-us-west-2
+          role-session-name: DDBEC-Dafny-Java-Tests
+
+      - uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - name: Setup MPL Dafny
+        uses: ./submodules/MaterialProviders/.github/actions/setup_dafny
+        with:
+          dafny-version: ${{ inputs.mpl-dafny }}
+
+      - name: Create temporary global.json
+        run: echo '{"sdk":{"rollForward":"latestFeature","version":"6.0.0"}}' > ./global.json
+
+      - name: Setup Java 17 for codegen
+        uses: actions/setup-java@v3
+        with:
+          distribution: "corretto"
+          java-version: "17"
+
+      - name: Update MPL submodule
+        working-directory: submodules/MaterialProviders
+        run: |
+          git fetch
+          git checkout ${{inputs.mpl-commit}}
+          git pull
+          git submodule update --init --recursive
+          git rev-parse HEAD
+
+      - uses: actions/checkout@v3
+      - name: Init Submodules
+        shell: bash
+        run: |
+          git submodule update --init --recursive submodules/smithy-dafny
+          git submodule update --init --recursive submodules/MaterialProviders
+
+      - name: Install Smithy-Dafny codegen dependencies
+        uses: ./.github/actions/install_smithy_dafny_codegen_dependencies
+
+      - name: Install Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go-version }}
+
+      - name: Install Go imports
+        shell: bash
+        run: |
+          go install golang.org/x/tools/cmd/goimports@latest
+
+      - name: Compile MPL with Dafny ${{inputs.mpl-dafny}}
+        shell: bash
+        working-directory: submodules/MaterialProviders/TestVectorsAwsCryptographicMaterialProviders
+        run: |
+          # This works because `node` is installed by default on GHA runners
+          CORES=$(node -e 'console.log(os.cpus().length)')
+          make transpile_go CORES=$CORES
+
+      - name: Setup DBESDK Dafny
+        uses: ./submodules/MaterialProviders/.github/actions/setup_dafny
+        with:
+          dafny-version: ${{ inputs.dbesdk-dafny}}
+
+      - name: Build DBESDK implementation
+        shell: bash
+        working-directory: ./${{ matrix.library }}
+        run: |
+          # This works because `node` is installed by default on GHA runners
+          CORES=$(node -e 'console.log(os.cpus().length)')
+          make transpile_go CORES=$CORES
+
+      - name: Test ${{ matrix.library }}
+        working-directory: ./${{ matrix.library }}
+        run: |
+          make test_go
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index eb4bc6e20..bf89178cb 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -9,6 +9,7 @@ on:
     # but this might need to be tweaked:
     # https://github.com/dafny-lang/dafny/blob/master/.github/workflows/deep-tests.yml#L16
     - cron: "30 16 * * *"
+  workflow_dispatch:
 
 jobs:
   getVersion:
@@ -64,6 +65,22 @@ jobs:
     with:
       dafny: "nightly-latest"
       regenerate-code: true
+  dafny_nightly_backwards_interop_dbesdk:
+    if: github.event_name != 'schedule' || github.repository_owner == 'aws'
+    needs: getVersion
+    uses: ./.github/workflows/dafny-interop.yml
+    with:
+      mpl-dafny: ${{needs.getVersion.outputs.version}}
+      mpl-commit: "main"
+      dbesdk-dafny: "nightly-latest"
+  dafny_nightly_backwards_interop_mpl:
+    if: github.event_name != 'schedule' || github.repository_owner == 'aws'
+    needs: getVersion
+    uses: ./.github/workflows/dafny-interop.yml
+    with:
+      mpl-dafny: "nightly-latest"
+      mpl-commit: "main"
+      dbesdk-dafny: ${{needs.getVersion.outputs.version}}
 
   cut-issue-on-failure:
     runs-on: ubuntu-22.04