diff --git a/.github/workflows/checks.yaml b/.github/workflows/checks.yaml
index f293852d..4d19651c 100644
--- a/.github/workflows/checks.yaml
+++ b/.github/workflows/checks.yaml
@@ -63,10 +63,13 @@ jobs:
               if: steps.cache.outputs.cache-hit != 'true'
             - name: Compile
               run: yarn build
-            - name: Run node in background for integration tests
-              run: npx hardhat --tsconfig tsconfig.testing.json node --hostname 127.0.0.1 --fork https://mainnet.infura.io/v3/${{ secrets.INFURA }} &
+            - name: Run mainnet node in background for integration tests
+              run: npx hardhat --tsconfig tsconfig.testing.json node --hostname 127.0.0.1 --fork ${{ secrets.RPC_URL_MAINNET }} &
+            - name: Run Polygon node in background for integration tests
+              run: npx hardhat --tsconfig tsconfig.testing.json --config hardhat.config.polygon.ts node --hostname 127.0.0.1 --fork ${{ secrets.RPC_URL_POLYGON }} --port 8137 &
             - name: Test
               run: yarn test
 env:
     CI: true
-    INFURA: ${{ secrets.INFURA }}
+    RPC_URL_MAINNET: ${{ secrets.RPC_URL_MAINNET }}
+    RPC_URL_POLYGON: ${{ secrets.RPC_URL_POLYGON }}