diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index aacdbf8..1b18e1a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,8 +3,6 @@ name: faucet tests
 on:
   push:
     branches: [main]
-  pull_request:
-    branches: [main]
 
 jobs:
   test:
@@ -61,3 +59,10 @@ jobs:
 
       - name: Deploy contracts
         run: yarn hardhat deploy --network hardhat
+        # This shouldn't be needed but because forking
+        # mode is always enabled in the hardhat config
+        # we need to define the mumbai URL here.
+        # TODO: Make forking mode configurable and
+        # remove this from here.
+        env:
+          MUMBAI_URL: ${{ secrets.MUMBAI_RPC_URL }}