diff --git a/installers/charm/pol/tests/test_charm.py b/installers/charm/pol/tests/test_charm.py
index 089b6e5..330ecee 100644
--- a/installers/charm/pol/tests/test_charm.py
+++ b/installers/charm/pol/tests/test_charm.py
@@ -74,6 +74,7 @@
         self,
     ) -> NoReturn:
         "Test with relations and mongodb config (internal)"
+        self.initialize_mysql_relation()
         self.initialize_kafka_relation()
         self.initialize_mongo_config()
         # Verifying status
@@ -85,6 +86,7 @@
         "Test with relations (internal)"
         self.initialize_kafka_relation()
         self.initialize_mongo_relation()
+        self.initialize_mysql_relation()
         # Verifying status
         self.assertNotIsInstance(self.harness.charm.unit.status, BlockedStatus)
 
@@ -97,6 +99,35 @@
         # Verifying status
         self.assertIsInstance(self.harness.charm.unit.status, BlockedStatus)
 
+    def test_mysql_config_success(self):
+        self.initialize_kafka_relation()
+        self.initialize_mongo_relation()
+        self.initialize_mysql_config()
+        # Verifying status
+        self.assertNotIsInstance(self.harness.charm.unit.status, BlockedStatus)
+
+    def test_mysql_config_wrong_value(self):
+        self.initialize_kafka_relation()
+        self.initialize_mongo_relation()
+        self.initialize_mysql_config(uri="wrong_uri")
+        # Verifying status
+        self.assertIsInstance(self.harness.charm.unit.status, BlockedStatus)
+        self.assertIn(
+            "mysql_uri is not properly formed",
+            self.harness.charm.unit.status.message,
+        )
+
+    def test_mysql_config_and_relation(self):
+        self.initialize_mysql_relation()
+        self.initialize_mysql_config()
+        # Verifying status
+        self.assertIsInstance(self.harness.charm.unit.status, BlockedStatus)
+        # import pdb; pdb.set_trace()
+        self.assertIn(
+            "Mysql data cannot be provided via config and relation",
+            self.harness.charm.unit.status.message,
+        )
+
     def initialize_kafka_relation(self):
         kafka_relation_id = self.harness.add_relation("kafka", "kafka")
         self.harness.add_relation_unit(kafka_relation_id, "kafka/0")
@@ -116,6 +147,27 @@
             {"connection_string": "mongodb://mongo:27017"},
         )
 
+    def initialize_mysql_config(self, uri=None):
+        self.harness.update_config(
+            {"mysql_uri": uri or "mysql://user:pass@mysql-host:3306/database"}
+        )
+
+    def initialize_mysql_relation(self):
+        mongodb_relation_id = self.harness.add_relation("mysql", "mysql")
+        self.harness.add_relation_unit(mongodb_relation_id, "mysql/0")
+        self.harness.update_relation_data(
+            mongodb_relation_id,
+            "mysql/0",
+            {
+                "user": "user",
+                "password": "pass",
+                "host": "host",
+                "port": "1234",
+                "database": "pol",
+                "root_password": "root_password",
+            },
+        )
+
 
 if __name__ == "__main__":
     unittest.main()