diff --git a/charts/k8s-gerrit/tests/helpers/git_callbacks.py b/charts/k8s-gerrit/tests/helpers/git_callbacks.py
new file mode 100644
index 0000000..3922a24
--- /dev/null
+++ b/charts/k8s-gerrit/tests/helpers/git_callbacks.py
@@ -0,0 +1,20 @@
+# Copyright (C) 2019 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import pygit2 as git
+
+
+class TestRemoteCallbacks(git.RemoteCallbacks):
+    def certificate_check(self, certificate, valid, host):
+        return True
diff --git a/charts/k8s-gerrit/tests/helpers/mock_ssl.py b/charts/k8s-gerrit/tests/helpers/mock_ssl.py
new file mode 100644
index 0000000..46d766c
--- /dev/null
+++ b/charts/k8s-gerrit/tests/helpers/mock_ssl.py
@@ -0,0 +1,49 @@
+# Copyright (C) 2019 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from OpenSSL import crypto
+
+
+class MockSSLKeyPair:
+    def __init__(self, common_name, subject_alt_name):
+        self.common_name = common_name
+        self.subject_alt_name = subject_alt_name
+        self.cert = None
+        self.key = None
+
+        self._create_keypair()
+
+    def _create_keypair(self):
+        self.key = crypto.PKey()
+        self.key.generate_key(crypto.TYPE_RSA, 2048)
+
+        self.cert = crypto.X509()
+        self.cert.set_version(2)
+        self.cert.get_subject().O = "Gerrit"
+        self.cert.get_subject().CN = self.common_name
+        san = f"DNS:{self.subject_alt_name}"
+        self.cert.add_extensions(
+            [crypto.X509Extension(b"subjectAltName", False, san.encode())]
+        )
+        self.cert.gmtime_adj_notBefore(0)
+        self.cert.gmtime_adj_notAfter(10 * 365 * 24 * 60 * 60)
+        self.cert.set_issuer(self.cert.get_subject())
+        self.cert.set_pubkey(self.key)
+        self.cert.sign(self.key, "sha256")
+
+    def get_key(self):
+        return crypto.dump_privatekey(crypto.FILETYPE_PEM, self.key)
+
+    def get_cert(self):
+        return crypto.dump_certificate(crypto.FILETYPE_PEM, self.cert)
diff --git a/charts/k8s-gerrit/tests/helpers/utils.py b/charts/k8s-gerrit/tests/helpers/utils.py
new file mode 100644
index 0000000..804217e
--- /dev/null
+++ b/charts/k8s-gerrit/tests/helpers/utils.py
@@ -0,0 +1,41 @@
+# Copyright (C) 2018 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import random
+import string
+
+
+def check_if_ancestor_image_is_inherited(image, ancestor):
+    """Helper function that looks for a given ancestor image in the layers of a
+      provided image. It can be used to check, whether an image uses the expected
+      FROM-statement
+
+    Arguments:
+      image {docker.images.Image} -- Docker image object to be checked
+      ancestor {str} -- Complete name of the expected ancestor image
+
+    Returns:
+      boolean -- True, if ancestor is inherited by image
+    """
+
+    contains_tag = False
+    for layer in image.history():
+        contains_tag = layer["Tags"] is not None and ancestor in layer["Tags"]
+        if contains_tag:
+            break
+    return contains_tag
+
+
+def create_random_string(length=8):
+    return "".join([random.choice(string.ascii_letters) for n in range(length)]).lower()