diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index cc9473115..f8dca9fcf 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -79,7 +79,8 @@ jobs:
             --image-replacements workspace/just.containerlookup \
             --namespace-file workspace/e2e.namespace \
             --platform ${{ inputs.platform }} \
-            --skip-undeploy="${{ inputs.skip-undeploy && 'true' || 'false' }}"
+            --skip-undeploy="${{ inputs.skip-undeploy && 'true' || 'false' }}" \
+            --namespace-suffix="-ci"
       - name: Download logs
         if: always()
         run: |
diff --git a/.github/workflows/e2e_aks_runtime.yml b/.github/workflows/e2e_aks_runtime.yml
index 4b3d10d15..54ee53995 100644
--- a/.github/workflows/e2e_aks_runtime.yml
+++ b/.github/workflows/e2e_aks_runtime.yml
@@ -87,7 +87,8 @@ jobs:
             --image-replacements workspace/just.containerlookup \
             --namespace-file workspace/e2e.namespace \
             --platform AKS-CLH-SNP \
-            --skip-undeploy="false"
+            --skip-undeploy="false" \
+            --namespace-suffix="-ci"
       - name: Download logs
         if: always()
         run: |
diff --git a/e2e/aks-runtime/aks_runtime_test.go b/e2e/aks-runtime/aks_runtime_test.go
index 04ef2fa34..6738d8492 100644
--- a/e2e/aks-runtime/aks_runtime_test.go
+++ b/e2e/aks-runtime/aks_runtime_test.go
@@ -34,7 +34,7 @@ func TestAKSRuntime(t *testing.T) {
 	require.NoError(err)
 	imageReplacements, err := kuberesource.ImageReplacementsFromFile(f)
 	require.NoError(err)
-	namespace := contrasttest.MakeNamespace(t)
+	namespace := contrasttest.MakeNamespace(t, contrasttest.Flags.NamespaceSuffix)
 
 	// Log versions
 	kataPolicyGenV, err := az.KataPolicyGenVersion()
diff --git a/e2e/internal/contrasttest/contrasttest.go b/e2e/internal/contrasttest/contrasttest.go
index be250608c..50b520a3e 100644
--- a/e2e/internal/contrasttest/contrasttest.go
+++ b/e2e/internal/contrasttest/contrasttest.go
@@ -40,6 +40,7 @@ type testFlags struct {
 	PlatformStr           string
 	ImageReplacementsFile string
 	NamespaceFile         string
+	NamespaceSuffix       string
 	SkipUndeploy          bool
 }
 
@@ -47,6 +48,7 @@ type testFlags struct {
 func RegisterFlags() {
 	flag.StringVar(&Flags.ImageReplacementsFile, "image-replacements", "", "path to image replacements file")
 	flag.StringVar(&Flags.NamespaceFile, "namespace-file", "", "file to store the namespace in")
+	flag.StringVar(&Flags.NamespaceSuffix, "namespace-suffix", "", "suffix to append to the namespace")
 	flag.StringVar(&Flags.PlatformStr, "platform", "", "Deployment platform")
 	flag.BoolVar(&Flags.SkipUndeploy, "skip-undeploy", false, "Skip undeploying the test namespace")
 }
diff --git a/justfile b/justfile
index 58e10e903..58642fd54 100644
--- a/justfile
+++ b/justfile
@@ -72,7 +72,8 @@ e2e target=default_deploy_target platform=default_platform: soft-clean coordinat
             --image-replacements ./{{ workspace_dir }}/just.containerlookup \
             --namespace-file ./{{ workspace_dir }}/just.namespace \
             --platform {{ platform }} \
-            --skip-undeploy=true
+            --skip-undeploy=true \
+            --namespace-suffix=${namespace_suffix-}
 
 # Generate policies, apply Kubernetes manifests.
 deploy target=default_deploy_target cli=default_cli platform=default_platform: (runtime target platform) (apply "runtime") (populate target platform) (generate cli platform) (apply target)