diff --git a/.github/workflows/e2e_tests.yaml b/.github/workflows/e2e_tests.yaml
index 42ee0b736..2f119bf6f 100644
--- a/.github/workflows/e2e_tests.yaml
+++ b/.github/workflows/e2e_tests.yaml
@@ -27,28 +27,9 @@ concurrency:
 jobs:
   kubernetes-e2e:
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-20.04-4core
 
     steps:
-      - name: Cleanup
-        run: |
-          ls -lart
-          echo "Initial status:"
-          df -h
-
-          echo "Cleaning up resources:"
-          sudo swapoff -a
-          sudo rm -f /swapfile
-          sudo apt clean
-          sudo rm -rf /usr/share/dotnet
-          sudo rm -rf /opt/ghc
-          sudo rm -rf "/usr/local/share/boost"
-          sudo rm -rf "$AGENT_TOOLSDIRECTORY"
-          docker rmi $(docker image ls -aq)
-
-          echo "Final status:"
-          df -h
-
       - name: Checkout code
         uses: actions/checkout@v3
         with:
diff --git a/.github/workflows/olm_tests.yaml b/.github/workflows/olm_tests.yaml
index 6ecede4e0..5002f0694 100644
--- a/.github/workflows/olm_tests.yaml
+++ b/.github/workflows/olm_tests.yaml
@@ -19,7 +19,7 @@ concurrency:
 
 jobs:
   kubernetes-olm-upgrade:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-20.04-4core
     timeout-minutes: 60
     env:
       OLM_VERSION: v0.24.0
@@ -30,25 +30,6 @@ jobs:
       CODEFLARE_TEST_TIMEOUT_LONG: "10m"
 
     steps:
-      - name: Cleanup
-        run: |
-          ls -lart
-          echo "Initial status:"
-          df -h
-
-          echo "Cleaning up resources:"
-          sudo swapoff -a
-          sudo rm -f /swapfile
-          sudo apt clean
-          sudo rm -rf /usr/share/dotnet
-          sudo rm -rf /opt/ghc
-          sudo rm -rf "/usr/local/share/boost"
-          sudo rm -rf "$AGENT_TOOLSDIRECTORY"
-          docker rmi $(docker image ls -aq)
-
-          echo "Final status:"
-          df -h
-
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0  # fetching also previous commits to get tags
diff --git a/test/e2e/mnist_pytorch_mcad_job_test.go b/test/e2e/mnist_pytorch_mcad_job_test.go
index 754121a39..84722152a 100644
--- a/test/e2e/mnist_pytorch_mcad_job_test.go
+++ b/test/e2e/mnist_pytorch_mcad_job_test.go
@@ -135,11 +135,11 @@ func TestMNISTPyTorchMCAD(t *testing.T) {
 							{
 								Replicas: 1,
 								Requests: corev1.ResourceList{
-									corev1.ResourceCPU:    resource.MustParse("100m"),
+									corev1.ResourceCPU:    resource.MustParse("250m"),
 									corev1.ResourceMemory: resource.MustParse("512Mi"),
 								},
 								Limits: corev1.ResourceList{
-									corev1.ResourceCPU:    resource.MustParse("500m"),
+									corev1.ResourceCPU:    resource.MustParse("1"),
 									corev1.ResourceMemory: resource.MustParse("1G"),
 								},
 							},
diff --git a/test/e2e/mnist_rayjob_mcad_raycluster_test.go b/test/e2e/mnist_rayjob_mcad_raycluster_test.go
index 1a1aab2c7..7752d2eab 100644
--- a/test/e2e/mnist_rayjob_mcad_raycluster_test.go
+++ b/test/e2e/mnist_rayjob_mcad_raycluster_test.go
@@ -169,7 +169,7 @@ func TestMNISTRayJobMCADRayCluster(t *testing.T) {
 										},
 										Limits: corev1.ResourceList{
 											corev1.ResourceCPU:    resource.MustParse("1"),
-											corev1.ResourceMemory: resource.MustParse("512Mi"),
+											corev1.ResourceMemory: resource.MustParse("1G"),
 										},
 									},
 								},