diff --git a/ci/jenkins/jobs/projects.yaml b/ci/jenkins/jobs/projects.yaml
index 7fc03ca8e41..59b314e4a67 100644
--- a/ci/jenkins/jobs/projects.yaml
+++ b/ci/jenkins/jobs/projects.yaml
@@ -556,7 +556,7 @@
                 variable: CODECOV_TOKEN
           - timeout:
               fail: true
-              timeout: 150
+              timeout: 240
               type: absolute
           - credentials-binding:
             - text:
diff --git a/ci/jenkins/test-vmc.sh b/ci/jenkins/test-vmc.sh
index 4a3e9be5d66..1b6e0ad3028 100755
--- a/ci/jenkins/test-vmc.sh
+++ b/ci/jenkins/test-vmc.sh
@@ -590,20 +590,23 @@ function garbage_collection() {
     echo "=== Auto cleanup starts ==="
     export KUBECONFIG=$KUBECONFIG_PATH
 
-    kubectl get ns -l antrea-ci -o custom-columns=Name:.metadata.name,DATE:.metadata.creationTimestamp --no-headers=true | awk '{cmd="echo $(( $(date +%s) - $(date -d "$2" +%s) ))"; cmd | getline t ; print $1, t}' | awk '$1 ~ "matrix" && $2 > 14400 {print $1}' | while read cluster; do
-        echo "=== Currently ${cluster} has been live for more than 4h ==="
+    kubectl get ns -l antrea-ci -o custom-columns=Name:.metadata.name,DATE:.metadata.creationTimestamp --no-headers=true | awk '{cmd="echo $(( $(date +%s) - $(date -d "$2" +%s) ))"; cmd | getline t ; print $1, t}' | awk '$1 ~ "matrix" && $2 > 36000 {print $1}' | while read cluster; do
+        # Matrix tests
+        echo "=== Currently ${cluster} has been live for more than 10h ==="
         kubectl delete ns ${cluster}
         echo "=== Old namespace ${cluster} has been deleted !!! ==="
     done
 
-    kubectl get ns -l antrea-ci -o custom-columns=Name:.metadata.name,DATE:.metadata.creationTimestamp --no-headers=true | awk '{cmd="echo $(( $(date +%s) - $(date -d "$2" +%s) ))"; cmd | getline t ; print $1, t}' | awk '$1 ~ "whole-conformance" && $2 > 10800 {print $1}' | while read cluster; do
-        echo "=== Currently ${cluster} has been live for more than 3h ==="
+    kubectl get ns -l antrea-ci -o custom-columns=Name:.metadata.name,DATE:.metadata.creationTimestamp --no-headers=true | awk '{cmd="echo $(( $(date +%s) - $(date -d "$2" +%s) ))"; cmd | getline t ; print $1, t}' | awk '$1 ~ "whole-conformance" && $2 > 14400 {print $1}' | while read cluster; do
+        # Whole-conformance test
+        echo "=== Currently ${cluster} has been live for more than 4h ==="
         kubectl delete ns ${cluster}
         echo "=== Old namespace ${cluster} has been deleted !!! ==="
     done
 
-    kubectl get ns -l antrea-ci -o custom-columns=Name:.metadata.name,DATE:.metadata.creationTimestamp --no-headers=true | awk '{cmd="echo $(( $(date +%s) - $(date -d "$2" +%s) ))"; cmd | getline t ; print $1, t}' | awk '$1 !~ "matrix" && $1 !~ "whole-conformance" && $2 > 5400 {print $1}' | while read cluster; do
-        echo "=== Currently ${cluster} has been live for more than 1.5h ==="
+    kubectl get ns -l antrea-ci -o custom-columns=Name:.metadata.name,DATE:.metadata.creationTimestamp --no-headers=true | awk '{cmd="echo $(( $(date +%s) - $(date -d "$2" +%s) ))"; cmd | getline t ; print $1, t}' | awk '$1 !~ "matrix" && $1 !~ "whole-conformance" && $2 > 9000 {print $1}' | while read cluster; do
+        # e2e, conformance, networkpolicy tests
+        echo "=== Currently ${cluster} has been live for more than 2.5h ==="
         kubectl delete ns ${cluster}
         echo "=== Old namespace ${cluster} has been deleted !!! ==="
     done
@@ -618,6 +621,7 @@ function clean_tmp() {
         "kustomize-*"
         "*antrea*"
         "go-build*"
+        "codecov.*.gz"
     )
     for item in "${CLEAN_LIST[@]}"; do
         find /tmp -name "${item}" -mtime +7 -exec rm -rf {} \; 2>&1 | grep -v "Permission denied" || true