diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 3e55b5800..e388a61f6 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -15,15 +15,9 @@
 name: CI
 
 on:
-  pull_request:
-    types:
-      - opened
-      - synchronize
-    branches:
-      - main
-      - release-*
   push:
     branches:
+      - "pull-request/[0-9]+"
       - main
       - release-*
 
@@ -213,7 +207,7 @@ jobs:
   ### e2e tests ###
   e2e-tests-containerd:
     needs: [build-gpu-operator, build-gpu-operator-validator]
-    runs-on: ubuntu-latest
+    runs-on: linux-amd64-cpu4
     steps:
       - uses: actions/checkout@v4
         name: Check out code
@@ -265,7 +259,7 @@ jobs:
 
   e2e-tests-nvidiadriver:
     needs: [build-gpu-operator, build-gpu-operator-validator]
-    runs-on: ubuntu-latest
+    runs-on: linux-amd64-cpu4
     steps:
       - uses: actions/checkout@v4
         name: Check out code
diff --git a/tests/holodeck.yaml b/tests/holodeck.yaml
index 5cbdae24b..ef890fdf2 100644
--- a/tests/holodeck.yaml
+++ b/tests/holodeck.yaml
@@ -12,7 +12,12 @@ spec:
     type: g4dn.xlarge
     region: us-west-1
     ingressIpRanges:
-      - 0.0.0.0/0
+    - 18.190.12.32/32
+    - 3.143.46.93/32
+    - 52.15.119.136/32
+    - 35.155.108.162/32
+    - 35.162.190.51/32
+    - 54.201.61.24/32
     image:
       architecture: amd64
       imageId: ami-0ce2cb35386fc22e9