diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 50233aa5..3edb1da5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,9 +5,21 @@ on:
     branches:
       - main
   pull_request:
+  workflow_call:
+    inputs:
+      test_data_branch:
+        type: string
+        description: The branch in sdk-test-data to target for testcase files
+        required: false
+      sdk_branch:
+        type: string
+        description: The branch of the SDK to test
+        required: false
 
 env:
   CARGO_TERM_COLOR: always
+  SDK_BRANCH: ${{ inputs.sdk_branch  || github.ref || 'main' }}
+  TEST_DATA_BRANCH: ${{ inputs.test_data_branch || 'main' }}
 
 jobs:
   cargo_build_and_test:
@@ -20,7 +32,17 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          submodules: true
+          submodules: ${{ !inputs.test_data_branch }}
+          repository: Eppo-exp/eppo-multiplatform
+          ref: ${{ env.SDK_BRANCH }}
+
+      - uses: actions/checkout@v4
+        if: ${{ inputs.test_data_branch }}
+        with:
+          repository: Eppo-exp/sdk-test-data
+          ref: ${{ inputs.test_data_branch }}
+          path: sdk-test-data
+
       - run: npm ci
       - run: rustup update ${{ matrix.toolchain }} && rustup default ${{ matrix.toolchain }}
       # Add WASM target