diff --git a/helm-chart/kube-hpa-scale-to-zero/templates/rbac.yaml b/helm-chart/kube-hpa-scale-to-zero/templates/rbac.yaml
index b96f8ab..e006cb6 100644
--- a/helm-chart/kube-hpa-scale-to-zero/templates/rbac.yaml
+++ b/helm-chart/kube-hpa-scale-to-zero/templates/rbac.yaml
@@ -29,6 +29,7 @@ metadata:
 subjects:
   - kind: ServiceAccount
     name: {{ include "kube-hpa-scale-to-zero.serviceAccountName" . }}
+    # namespace: {{ .Release.Namespace }}
 roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: Role
diff --git a/tests/e2e_test.py b/tests/e2e_test.py
index 250b635..46e60b4 100644
--- a/tests/e2e_test.py
+++ b/tests/e2e_test.py
@@ -9,6 +9,7 @@
 
 TESTS_PATH = Path(__file__).parent
 MANIFESTS_PATH = TESTS_PATH / "manifests"
+TEST_NS = "test-ns"
 
 TIMEOUT = SYNC_INTERVAL * 3
 
@@ -26,6 +27,7 @@ def run(*, command: list[str], **kw_args) -> str:
 @pytest.fixture(scope="session")
 def setup():
     try:
+        run(command=["kubectl", "create", "namespace", TEST_NS])
         run(
             command=[
                 "helm",
@@ -75,18 +77,19 @@ def setup():
             ]
         )
         run(command=["kubectl", "delete", "-f", f"{MANIFESTS_PATH}/metrics-generator.yaml"])
+        run(command=["kubectl", "delete", "namespace", TEST_NS])
 
 
 def deploy_target(manifest: str):
-    run(command=["kubectl", "apply", "-f", f"{MANIFESTS_PATH}/{manifest}"])
+    run(command=["kubectl", "apply", "-f", f"{MANIFESTS_PATH}/{manifest}", "--namespace", TEST_NS])
 
 
 def delete_target(manifest: str):
-    run(command=["kubectl", "delete", "-f", f"{MANIFESTS_PATH}/{manifest}"])
+    run(command=["kubectl", "delete", "-f", f"{MANIFESTS_PATH}/{manifest}", "--namespace", TEST_NS])
 
 
 def run_scaler():
-    return subprocess.Popen(["python", f"{TESTS_PATH.parent}/main.py"])
+    return subprocess.Popen(["python", f"{TESTS_PATH.parent}/main.py", "--hpa-namespace", TEST_NS])
 
 
 def set_foo_metric_value(value: int):
@@ -111,6 +114,8 @@ def wait_deployment_scale(*, name: str, replicas: int):
             f"--for=jsonpath={{.spec.replicas}}={replicas}",
             "deployment",
             name,
+            "--namespace",
+            TEST_NS,
             f"--timeout={TIMEOUT}s",
         ]
     )