diff --git a/tests/test_plugins/test_provided_validators/__init__.py b/tests/test_plugins/test_provided_validators/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/test_plugins/test_provided_validators/test_is_json.py b/tests/test_plugins/test_provided_validators/test_is_json.py
new file mode 100644
index 000000000..b9533c3da
--- /dev/null
+++ b/tests/test_plugins/test_provided_validators/test_is_json.py
@@ -0,0 +1,73 @@
+from django.core.exceptions import ValidationError
+from django.test import TestCase, override_settings
+from rest_framework import serializers
+from Squest.utils.plugin_controller import PluginController
+
+
+class TestSSHPublicKeyValidator(TestCase):
+    def test_with_text(self):
+        json_text = "aaaabbbbcccc"
+        loaded_module = PluginController.get_ui_field_validator_def("is_json")
+        with self.assertRaises(ValidationError):
+            loaded_module(json_text)
+        loaded_module = PluginController.get_api_field_validator_def("is_json")
+        with self.assertRaises(serializers.ValidationError):
+            loaded_module(json_text)
+
+    def test_with_empty_text(self):
+        json_text = ""
+        loaded_module = PluginController.get_ui_field_validator_def("is_json")
+        with self.assertRaises(ValidationError):
+            loaded_module(json_text)
+        loaded_module = PluginController.get_api_field_validator_def("is_json")
+        with self.assertRaises(serializers.ValidationError):
+            loaded_module(json_text)
+
+    def test_with_double_json(self):
+        json_text = '{"my_json": "is_ok", other_json: {"in_side": 13}}{"outside": "is_not_ok"}'
+        loaded_module = PluginController.get_ui_field_validator_def("is_json")
+        with self.assertRaises(ValidationError):
+            loaded_module(json_text)
+        loaded_module = PluginController.get_api_field_validator_def("is_json")
+        with self.assertRaises(serializers.ValidationError):
+            loaded_module(json_text)
+
+    def test_with_single_quote(self):
+        json_text = "{'my_json': 'is_ok', other_json: {'in_side': 13}}"
+        loaded_module = PluginController.get_ui_field_validator_def("is_json")
+        with self.assertRaises(ValidationError):
+            loaded_module(json_text)
+        loaded_module = PluginController.get_api_field_validator_def("is_json")
+        with self.assertRaises(serializers.ValidationError):
+            loaded_module(json_text)
+
+    def test_with_missing_quote(self):
+        json_text = '{"my_json": "is_ok", other_json: {"in_side": 13}}'
+        loaded_module = PluginController.get_ui_field_validator_def("is_json")
+        with self.assertRaises(ValidationError):
+            loaded_module(json_text)
+        loaded_module = PluginController.get_api_field_validator_def("is_json")
+        with self.assertRaises(serializers.ValidationError):
+            loaded_module(json_text)
+
+    def test_with_additional_comma(self):
+        json_text = '{"my_json": "is_ok", "other_json": {"in_side": 13},}'
+        loaded_module = PluginController.get_ui_field_validator_def("is_json")
+        with self.assertRaises(ValidationError):
+            loaded_module(json_text)
+        loaded_module = PluginController.get_api_field_validator_def("is_json")
+        with self.assertRaises(serializers.ValidationError):
+            loaded_module(json_text)
+
+    def test_with_json(self):
+        json_text = '{"my_json": "is_ok", "other_json": {"in_side": 13}}'
+        loaded_module = PluginController.get_api_field_validator_def("is_json")
+        try:
+            loaded_module(json_text)
+        except ValidationError:
+            self.fail("UI validator fail")
+        loaded_module = PluginController.get_api_field_validator_def("is_json")
+        try:
+            loaded_module(json_text)
+        except serializers.ValidationError:
+            self.fail("API validator fail")
diff --git a/tests/test_plugins/test_provided_validators/test_is_public_ssh_key.py b/tests/test_plugins/test_provided_validators/test_is_public_ssh_key.py
new file mode 100644
index 000000000..825f93a0e
--- /dev/null
+++ b/tests/test_plugins/test_provided_validators/test_is_public_ssh_key.py
@@ -0,0 +1,43 @@
+from django.core.exceptions import ValidationError
+from django.test import TestCase, override_settings
+from rest_framework import serializers
+from Squest.utils.plugin_controller import PluginController
+
+
+class TestSSHPublicKeyValidator(TestCase):
+    def test_with_wrong_ssh_key(self):
+        public_ssh_key = "aaaa bbbb cccc"
+        loaded_module = PluginController.get_ui_field_validator_def("is_public_ssh_key")
+        with self.assertRaises(ValidationError):
+            loaded_module(public_ssh_key)
+        loaded_module = PluginController.get_api_field_validator_def("is_public_ssh_key")
+        with self.assertRaises(serializers.ValidationError):
+            loaded_module(public_ssh_key)
+
+    def test_with_rsa(self):
+        public_ssh_key = "ssh-rsa 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 squest@fake"
+        loaded_module = PluginController.get_api_field_validator_def("is_public_ssh_key")
+        try:
+            loaded_module(public_ssh_key)
+        except ValidationError:
+            self.fail("UI validator fail")
+        loaded_module = PluginController.get_api_field_validator_def("is_public_ssh_key")
+        try:
+            loaded_module(public_ssh_key)
+        except serializers.ValidationError:
+            self.fail("API validator fail")
+
+    def test_with_ed25519(self):
+        public_ssh_key = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPYqhDwOvBaWrGC257fdxfy1iMM6ZY2VwgmP+XlRRMT8 squest@fake"
+        loaded_module = PluginController.get_api_field_validator_def("is_public_ssh_key")
+        try:
+            loaded_module(public_ssh_key)
+        except ValidationError:
+            self.fail("UI validator fail")
+        loaded_module = PluginController.get_api_field_validator_def("is_public_ssh_key")
+        try:
+            loaded_module(public_ssh_key)
+        except serializers.ValidationError:
+            self.fail("API validator fail")
+
+