diff --git a/.ats/main.yaml b/.ats/main.yaml
new file mode 100644
index 0000000..7f52e45
--- /dev/null
+++ b/.ats/main.yaml
@@ -0,0 +1,36 @@
+app-tests-app-config-file: tests/test-values.yaml
+app-tests-deploy-namespace: monitoring
+
+smoke-tests-cluster-type: kind
+
+upgrade-tests-cluster-type: kind
+upgrade-tests-app-catalog-url: https://giantswarm.github.io/control-plane-catalog
+upgrade-tests-app-config-file: tests/test-values.yaml
+
+skip-steps: [functional]
+
+# --------
+# Uncomment values below this line to be able to execute app-test-suite against an externally created
+# Kubernetes cluster.
+# Comment out everything above
+
+# If you  want to create a kind cluster, use the line below
+# kind create cluster --config tests/kind-config.yaml --kubeconfig kube.config
+# --------
+
+# app-tests-app-config-file: tests/test-values.yaml
+# app-tests-deploy-namespace: loki
+
+# upgrade-tests-app-catalog-url: https://giantswarm.github.io/giantswarm-catalog
+# upgrade-tests-app-config-file: tests/test-values.yaml
+
+# skip-steps: [functional, upgrade]
+
+# smoke-tests-cluster-type: external
+# functional-tests-cluster-type: external
+# upgrade-tests-cluster-type: external
+# external-cluster-kubeconfig-path: kube.config
+# external-cluster-type: kind
+# external-cluster-version: 1.24.0
+
+# app-tests-skip-app-delete: "Yes"
diff --git a/.circleci/config.yml b/.circleci/config.yml
index cd597bd..a8c4d11 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,44 +3,62 @@ version: 2.1
 orbs:
   architect: giantswarm/architect@5.8.0
 
+jobs:
+  template-chart:
+    docker:
+      - image: giantswarm/helm-chart-testing:v3.11.0
+    steps:
+      - checkout
+      - run: |-
+          cd helm/sloth
+          helm dep up
+          helm template .
+
 workflows:
   build:
     jobs:
+      - template-chart:
+          name: "template-chart-test"
+          filters:
+            branches:
+              ignore:
+                - main
+
       # Ensure that for every commit to master and for every
       # release tag, there is an app version in the catalog.
       - architect/push-to-app-catalog:
           context: architect
-          name: push-sloth-app-to-control-plane-catalog-master
+          executor: app-build-suite
+          name: package-and-push-chart
           app_catalog: "control-plane-catalog"
           app_catalog_test: "control-plane-test-catalog"
           chart: "sloth"
+          persist_chart_archive: true
           filters:
             tags:
               only: /^v.*/
-      - architect/push-to-app-collection:
-          name: aws-app-collection
-          context: "architect"
-          app_catalog: control-plane-catalog
-          app_name: "sloth"
-          app_namespace: monitoring
-          app_collection_repo: "aws-app-collection"
+
+      - architect/run-tests-with-ats:
+          name: run-tests-with-ats
+          ## TODO Remove once new architect orb is released
+          app-test-suite_version: "v0.8.0"
+          app-test-suite_container_tag: "0.8.0"
           requires:
-            - push-sloth-app-to-control-plane-catalog-master
+            - "package-and-push-chart"
           filters:
             branches:
-              ignore: /.*/
-            tags:
-              only: /^v.*/
+              ignore:
+                - main
 
       - architect/push-to-app-collection:
-          name: azure-app-collection
+          name: aws-app-collection
           context: "architect"
           app_catalog: control-plane-catalog
           app_name: "sloth"
           app_namespace: monitoring
-          app_collection_repo: "azure-app-collection"
+          app_collection_repo: "aws-app-collection"
           requires:
-            - push-sloth-app-to-control-plane-catalog-master
+            - run-tests-with-ats
           filters:
             branches:
               ignore: /.*/
@@ -55,7 +73,7 @@ workflows:
           app_namespace: monitoring
           app_collection_repo: "vsphere-app-collection"
           requires:
-            - push-sloth-app-to-control-plane-catalog-master
+            - run-tests-with-ats
           filters:
             branches:
               ignore: /.*/
@@ -70,7 +88,7 @@ workflows:
           app_namespace: monitoring
           app_collection_repo: "cloud-director-app-collection"
           requires:
-            - push-sloth-app-to-control-plane-catalog-master
+            - run-tests-with-ats
           filters:
             branches:
               ignore: /.*/
@@ -85,7 +103,7 @@ workflows:
           app_namespace: monitoring
           app_collection_repo: "capa-app-collection"
           requires:
-            - push-sloth-app-to-control-plane-catalog-master
+            - run-tests-with-ats
           filters:
             branches:
               ignore: /.*/
@@ -100,24 +118,10 @@ workflows:
           app_namespace: monitoring
           app_collection_repo: "capz-app-collection"
           requires:
-            - push-sloth-app-to-control-plane-catalog-master
+            - run-tests-with-ats
           filters:
             branches:
               ignore: /.*/
             tags:
               only: /^v.*/
 
-      - architect/push-to-app-collection:
-          context: architect
-          name: push-to-gcp-app-collection
-          app_catalog: control-plane-catalog
-          app_name: "sloth"
-          app_namespace: monitoring
-          app_collection_repo: "gcp-app-collection"
-          requires:
-            - push-sloth-app-to-control-plane-catalog-master
-          filters:
-            branches:
-              ignore: /.*/
-            tags:
-              only: /^v.*/()
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 421dc49..b8e3546 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project's packages adheres to [Semantic Versioning](http://semver.org/s
 
 ## [Unreleased]
 
+### Added
+
+- Add helm chart templating test in ci pipeline.
+- Add tests with ats in ci pipeline.
+
 ## [1.4.5] - 2024-06-12
 
 ### Changed
diff --git a/helm/sloth/Chart.yaml b/helm/sloth/Chart.yaml
index 75860e9..394b4ec 100644
--- a/helm/sloth/Chart.yaml
+++ b/helm/sloth/Chart.yaml
@@ -1,9 +1,10 @@
 apiVersion: v2
 name: sloth
 description: Base chart for Sloth.
+icon: https://s.giantswarm.io/app-icons/sloth/1/light-icon.svg
 type: application
 home: https://github.com/slok/sloth
 kubeVersion: ">= 1.19.0-0"
-version: [[ .Version ]]
+version: 1.4.5
 annotations:
   application.giantswarm.io/team: "atlas"
diff --git a/helm/sloth/templates/deployment.yaml b/helm/sloth/templates/deployment.yaml
index d34e21e..564cb64 100644
--- a/helm/sloth/templates/deployment.yaml
+++ b/helm/sloth/templates/deployment.yaml
@@ -100,6 +100,9 @@ spec:
             - name: sloth-common-sli-plugins
               # Default path for git-sync.
               mountPath: /git
+            - name: tmp
+              # Default path for git files to be created.
+              mountPath: /tmp
           {{- with .Values.securityContext.container }}
           securityContext:
             {{- toYaml . | nindent 12 }}
@@ -109,10 +112,12 @@ spec:
         {{- end }}
       {{- if .Values.imagePullSecrets }}
       imagePullSecrets:
-{{ include "sloth.imagePullSecrets" . | trim | indent 8 }}
+        {{ include "sloth.imagePullSecrets" . | trim | nindent 8 }}
       {{- end }}
       {{- if or .Values.commonPlugins.enabled .Values.customSloConfig.enabled }}
       volumes:
+        - name: tmp
+          emptyDir: {}
       {{- if .Values.commonPlugins.enabled }}
         - name: sloth-common-sli-plugins
           emptyDir: {}
diff --git a/helm/sloth/values.yaml b/helm/sloth/values.yaml
index 81019d6..f1c1f16 100644
--- a/helm/sloth/values.yaml
+++ b/helm/sloth/values.yaml
@@ -80,6 +80,7 @@ securityContext:
       type: RuntimeDefault
   container:
     allowPrivilegeEscalation: false
+    readOnlyRootFilesystem: true
     seccompProfile:
       type: RuntimeDefault
     capabilities:
diff --git a/tests/ats/Pipfile b/tests/ats/Pipfile
new file mode 100644
index 0000000..977a904
--- /dev/null
+++ b/tests/ats/Pipfile
@@ -0,0 +1,12 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+pytest-helm-charts = ">=1.0.2"
+pytest = ">=6.2.5"
+pykube-ng = ">=22.1.0"
+
+[requires]
+python_version = "3.9"
diff --git a/tests/ats/Pipfile.lock b/tests/ats/Pipfile.lock
new file mode 100644
index 0000000..c9083a5
--- /dev/null
+++ b/tests/ats/Pipfile.lock
@@ -0,0 +1,359 @@
+{
+  "_meta": {
+      "hash": {
+          "sha256": "5773e715b0013edff328bf43351daa2cc4e94bf83adb158a3246e7f43ed206b2"
+      },
+      "pipfile-spec": 6,
+      "requires": {
+          "python_version": "3.9"
+      },
+      "sources": [
+          {
+              "name": "pypi",
+              "url": "https://pypi.org/simple",
+              "verify_ssl": true
+          }
+      ]
+  },
+  "default": {
+      "certifi": {
+          "hashes": [
+              "sha256:922820b53db7a7257ffbda3f597266d435245903d80737e34f8a45ff3e3230d8",
+              "sha256:bec941d2aa8195e248a60b31ff9f0558284cf01a52591ceda73ea9afffd69fd9"
+          ],
+          "markers": "python_version >= '3.6'",
+          "version": "==2024.8.30"
+      },
+      "charset-normalizer": {
+          "hashes": [
+              "sha256:06435b539f889b1f6f4ac1758871aae42dc3a8c0e24ac9e60c2384973ad73027",
+              "sha256:06a81e93cd441c56a9b65d8e1d043daeb97a3d0856d177d5c90ba85acb3db087",
+              "sha256:0a55554a2fa0d408816b3b5cedf0045f4b8e1a6065aec45849de2d6f3f8e9786",
+              "sha256:0b2b64d2bb6d3fb9112bafa732def486049e63de9618b5843bcdd081d8144cd8",
+              "sha256:10955842570876604d404661fbccbc9c7e684caf432c09c715ec38fbae45ae09",
+              "sha256:122c7fa62b130ed55f8f285bfd56d5f4b4a5b503609d181f9ad85e55c89f4185",
+              "sha256:1ceae2f17a9c33cb48e3263960dc5fc8005351ee19db217e9b1bb15d28c02574",
+              "sha256:1d3193f4a680c64b4b6a9115943538edb896edc190f0b222e73761716519268e",
+              "sha256:1f79682fbe303db92bc2b1136016a38a42e835d932bab5b3b1bfcfbf0640e519",
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+              "sha256:efcb3f6676480691518c177e3b465bcddf57cea040302f9f4e6e191af91174d4",
+              "sha256:f27273b60488abe721a075bcca6d7f3964f9f6f067c8c4c605743023d7d3944f",
+              "sha256:f30c3cb33b24454a82faecaf01b19c18562b1e89558fb6c56de4d9118a032fd5",
+              "sha256:fb69256e180cb6c8a894fee62b3afebae785babc1ee98b81cdf68bbca1987f33",
+              "sha256:fd1abc0d89e30cc4e02e4064dc67fcc51bd941eb395c502aac3ec19fab46b519",
+              "sha256:ff8fa367d09b717b2a17a052544193ad76cd49979c805768879cb63d9ca50561"
+          ],
+          "markers": "python_full_version >= '3.7.0'",
+          "version": "==3.3.2"
+      },
+      "deprecated": {
+          "hashes": [
+              "sha256:6fac8b097794a90302bdbb17b9b815e732d3c4720583ff1b198499d78470466c",
+              "sha256:e5323eb936458dccc2582dc6f9c322c852a775a27065ff2b0c4970b9d53d01b3"
+          ],
+          "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+          "version": "==1.2.14"
+      },
+      "exceptiongroup": {
+          "hashes": [
+              "sha256:3111b9d131c238bec2f8f516e123e14ba243563fb135d3fe885990585aa7795b",
+              "sha256:47c2edf7c6738fafb49fd34290706d1a1a2f4d1c6df275526b62cbb4aa5393cc"
+          ],
+          "markers": "python_version < '3.11'",
+          "version": "==1.2.2"
+      },
+      "idna": {
+          "hashes": [
+              "sha256:050b4e5baadcd44d760cedbd2b8e639f2ff89bbc7a5730fcc662954303377aac",
+              "sha256:d838c2c0ed6fced7693d5e8ab8e734d5f8fda53a039c0164afb0b82e771e3603"
+          ],
+          "markers": "python_version >= '3.6'",
+          "version": "==3.8"
+      },
+      "iniconfig": {
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+          "version": "==23.6.0"
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+          ],
+          "markers": "python_version >= '3.8'",
+          "version": "==6.0.2"
+      },
+      "requests": {
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+          ],
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+      },
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+          ],
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+      },
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+      },
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+              "sha256:f2058f813d4f2b5e3a9eb2eb3faf8f1d99b81c3e51aeda4b168406443e8ba809",
+              "sha256:f6b2d0c6703c988d334f297aa5df18c45e97b0af3679bb75059e0e0bd8b1069d",
+              "sha256:f8212564d49c50eb4565e502814f694e240c55551a5f1bc841d4fcaabb0a9b8a",
+              "sha256:ffa565331890b90056c01db69c0fe634a776f8019c143a5ae265f9c6bc4bd6d4"
+          ],
+          "markers": "python_version >= '3.6'",
+          "version": "==1.16.0"
+      }
+  },
+  "develop": {}
+}
diff --git a/tests/ats/pytest.ini b/tests/ats/pytest.ini
new file mode 100644
index 0000000..8511972
--- /dev/null
+++ b/tests/ats/pytest.ini
@@ -0,0 +1,6 @@
+[pytest]
+markers =
+    smoke
+    functional
+    upgrade
+    flaky
diff --git a/tests/ats/test_sloth.py b/tests/ats/test_sloth.py
new file mode 100644
index 0000000..fddbf25
--- /dev/null
+++ b/tests/ats/test_sloth.py
@@ -0,0 +1,144 @@
+import logging
+
+from typing import List
+import yaml
+import requests
+from pathlib import Path
+
+import pytest
+import pykube
+from pytest_helm_charts.clusters import Cluster
+from pytest_helm_charts.k8s.deployment import wait_for_deployments_to_run
+from pytest_helm_charts.utils import wait_for_objects_condition
+
+logger = logging.getLogger(__name__)
+
+namespace_name = "monitoring"
+deployment_name = "sloth"
+
+timeout: int = 300
+
+prometheusRuleCRDURL = "https://github.com/prometheus-operator/prometheus-operator/blob/main/example/prometheus-operator-crd/monitoring.coreos.com_prometheusrules.yaml"
+
+class PrometheusServiceLevel(pykube.objects.NamespacedAPIObject):
+    version = "sloth.slok.dev/v1"
+    endpoint = "prometheusservicelevels"
+    kind = "PrometheusServiceLevel"
+
+class PrometheusRules(pykube.objects.NamespacedAPIObject):
+    version = "monitoring.coreos.com/v1"
+    endpoint = "prometheusrules"
+    kind = "PrometheusRule"
+
+@pytest.mark.smoke
+def test_api_working(kube_cluster: Cluster) -> None:
+    """Very minimalistic example of using the [kube_cluster](pytest_helm_charts.fixtures.kube_cluster)
+    fixture to get an instance of [Cluster](pytest_helm_charts.clusters.Cluster) under test
+    and access its [kube_client](pytest_helm_charts.clusters.Cluster.kube_client) property
+    to get access to Kubernetes API of cluster under test.
+    Please refer to [pykube](https://pykube.readthedocs.io/en/latest/api/pykube.html) to get docs
+    for [HTTPClient](https://pykube.readthedocs.io/en/latest/api/pykube.html#pykube.http.HTTPClient).
+    """
+    assert kube_cluster.kube_client is not None
+    assert len(pykube.Node.objects(kube_cluster.kube_client)) >= 1
+
+# scope "module" means this is run only once, for the first test case requesting! It might be tricky
+# if you want to assert this multiple times
+# -- Checking that sloth's deployment is present on the cluster
+@pytest.fixture(scope="module")
+def deployments(kube_cluster: Cluster) -> List[pykube.Deployment]:
+    logger.info("Waiting for sloth to be deployed..")
+
+    deployments = wait_for_deployments(kube_cluster)
+
+    logger.info("sloth is deployed..")
+
+    return deployments
+
+def wait_for_deployments(kube_cluster: Cluster) -> List[pykube.Deployment]:
+    deployments = wait_for_deployments_to_run(
+        kube_cluster.kube_client,
+        [deployment_name],
+        namespace_name,
+        timeout,
+    )
+    return (deployments)
+
+# when we start the tests on circleci, we have to wait for pods to be available, hence
+# this additional delay and retries
+# -- Checking that sloth pods are available
+@pytest.mark.smoke
+def test_sloth_creates_prometheus_rules(kube_cluster: Cluster, deployments: List[pykube.Deployment]):
+    # loop over the list of deployments to make sure the pods are running
+    for d in deployments:
+        assert int(d.obj["status"]["readyReplicas"]) == int(d.obj["spec"]["replicas"])
+
+    sloName = "test-slo"
+    logger.info("Creating PrometheusServiceLevel..")
+    prometheusservicelevel = {
+      "apiVersion": "sloth.slok.dev/v1",
+      "kind": "PrometheusServiceLevel",
+      "metadata": {
+        "name": sloName,
+        "namespace": namespace_name,
+      },
+      "spec": {
+        "labels": {
+          "owner": "slo",
+        },
+        "service": "test-service",
+        "slos": [
+          {
+            "alerting": {
+              "labels": {
+                "team": "slo",
+              },
+              "name": sloName,
+              "pageAlert": {
+                "disable": False,
+                "labels": {
+                  "team": "slo",
+                },
+              },
+              "ticketAlert": {
+                "disable": False,
+                "labels": {
+                  "severity": "notify",
+                  "slack_channel": "#team-slo",
+                },
+              },
+            },
+            "description": "Test slo",
+            "name": sloName,
+            "objective": 95,
+            "sli": {
+              "events": {
+                "errorQuery": "avg_over_time(up{cluster_id=\"test\"}[{{.window}}]) > 80",
+                "totalQuery": "avg_over_time(up{cluster_id=\"test\"}[{{.window}}])",
+              },
+            },
+          },
+        ],
+      },
+    }
+    PrometheusServiceLevel(kube_cluster.kube_client, prometheusservicelevel).create()
+    logger.info("PrometheusServiceLevel created..")
+    logger.info("Waiting for PrometheusRules to be created..")
+    result = wait_for_objects_condition(
+      kube_cluster.kube_client,
+      PrometheusRules,
+      [sloName],
+      namespace_name,
+      _prometheus_rules_running,
+      timeout,
+      True,
+    )
+    logging.info("PrometheusRule created successfully..")
+    logging.info(result)
+    assert len(result) == 1
+
+def _prometheus_rules_running(rule: PrometheusRules) -> bool:
+    complete = (
+      "metadata" in rule.obj
+    )
+    return complete
diff --git a/tests/test-values.yaml b/tests/test-values.yaml
new file mode 100644
index 0000000..e69de29