diff --git a/packages/backend/src/models/__snapshots__/connection.test.js.snap b/packages/backend/src/models/__snapshots__/connection.test.js.snap
new file mode 100644
index 00000000..9fc77caf
--- /dev/null
+++ b/packages/backend/src/models/__snapshots__/connection.test.js.snap
@@ -0,0 +1,51 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`Connection model > jsonSchema should have correct validations 1`] = `
+{
+  "properties": {
+    "appAuthClientId": {
+      "format": "uuid",
+      "type": "string",
+    },
+    "createdAt": {
+      "type": "string",
+    },
+    "data": {
+      "type": "string",
+    },
+    "deletedAt": {
+      "type": "string",
+    },
+    "draft": {
+      "type": "boolean",
+    },
+    "formattedData": {
+      "type": "object",
+    },
+    "id": {
+      "format": "uuid",
+      "type": "string",
+    },
+    "key": {
+      "maxLength": 255,
+      "minLength": 1,
+      "type": "string",
+    },
+    "updatedAt": {
+      "type": "string",
+    },
+    "userId": {
+      "format": "uuid",
+      "type": "string",
+    },
+    "verified": {
+      "default": false,
+      "type": "boolean",
+    },
+  },
+  "required": [
+    "key",
+  ],
+  "type": "object",
+}
+`;
diff --git a/packages/backend/src/models/connection.js b/packages/backend/src/models/connection.js
index 26d139e7..225d31c6 100644
--- a/packages/backend/src/models/connection.js
+++ b/packages/backend/src/models/connection.js
@@ -160,35 +160,6 @@ class Connection extends Base {
     return this;
   }
 
-  // TODO: Make another abstraction like beforeSave instead of using
-  // beforeInsert and beforeUpdate separately for the same operation.
-  async $beforeInsert(queryContext) {
-    await super.$beforeInsert(queryContext);
-
-    await this.checkEligibilityForCreation();
-
-    this.encryptData();
-  }
-
-  async $beforeUpdate(opt, queryContext) {
-    await super.$beforeUpdate(opt, queryContext);
-    this.encryptData();
-  }
-
-  async $afterFind() {
-    this.decryptData();
-  }
-
-  async $afterInsert(queryContext) {
-    await super.$afterInsert(queryContext);
-    Telemetry.connectionCreated(this);
-  }
-
-  async $afterUpdate(opt, queryContext) {
-    await super.$afterUpdate(opt, queryContext);
-    Telemetry.connectionUpdated(this);
-  }
-
   async getApp() {
     if (!this.key) return null;
 
@@ -278,6 +249,35 @@ class Connection extends Base {
       },
     });
   }
+
+  // TODO: Make another abstraction like beforeSave instead of using
+  // beforeInsert and beforeUpdate separately for the same operation.
+  async $beforeInsert(queryContext) {
+    await super.$beforeInsert(queryContext);
+
+    await this.checkEligibilityForCreation();
+
+    this.encryptData();
+  }
+
+  async $beforeUpdate(opt, queryContext) {
+    await super.$beforeUpdate(opt, queryContext);
+    this.encryptData();
+  }
+
+  async $afterFind() {
+    this.decryptData();
+  }
+
+  async $afterInsert(queryContext) {
+    await super.$afterInsert(queryContext);
+    Telemetry.connectionCreated(this);
+  }
+
+  async $afterUpdate(opt, queryContext) {
+    await super.$afterUpdate(opt, queryContext);
+    Telemetry.connectionUpdated(this);
+  }
 }
 
 export default Connection;
diff --git a/packages/backend/src/models/connection.test.js b/packages/backend/src/models/connection.test.js
new file mode 100644
index 00000000..d9ce4795
--- /dev/null
+++ b/packages/backend/src/models/connection.test.js
@@ -0,0 +1,163 @@
+import { describe, it, expect, vi } from 'vitest';
+import AES from 'crypto-js/aes.js';
+import enc from 'crypto-js/enc-utf8.js';
+import appConfig from '../config/app.js';
+import AppAuthClient from './app-auth-client.js';
+import AppConfig from './app-config.js';
+import Base from './base.js';
+import Connection from './connection';
+import Step from './step.js';
+import User from './user.js';
+
+describe('Connection model', () => {
+  it('tableName should return correct name', () => {
+    expect(Connection.tableName).toBe('connections');
+  });
+
+  it('jsonSchema should have correct validations', () => {
+    expect(Connection.jsonSchema).toMatchSnapshot();
+  });
+
+  it('virtualAttributes should return correct attributes', () => {
+    const virtualAttributes = Connection.virtualAttributes;
+
+    const expectedAttributes = ['reconnectable'];
+
+    expect(virtualAttributes).toStrictEqual(expectedAttributes);
+  });
+
+  it('relationMappings should return correct associations', () => {
+    const relationMappings = Connection.relationMappings();
+
+    const expectedRelations = {
+      user: {
+        relation: Base.BelongsToOneRelation,
+        modelClass: User,
+        join: {
+          from: 'connections.user_id',
+          to: 'users.id',
+        },
+      },
+      steps: {
+        relation: Base.HasManyRelation,
+        modelClass: Step,
+        join: {
+          from: 'connections.id',
+          to: 'steps.connection_id',
+        },
+      },
+      triggerSteps: {
+        relation: Base.HasManyRelation,
+        modelClass: Step,
+        join: {
+          from: 'connections.id',
+          to: 'steps.connection_id',
+        },
+        filter: expect.any(Function),
+      },
+      appConfig: {
+        relation: Base.BelongsToOneRelation,
+        modelClass: AppConfig,
+        join: {
+          from: 'connections.key',
+          to: 'app_configs.key',
+        },
+      },
+      appAuthClient: {
+        relation: Base.BelongsToOneRelation,
+        modelClass: AppAuthClient,
+        join: {
+          from: 'connections.app_auth_client_id',
+          to: 'app_auth_clients.id',
+        },
+      },
+    };
+
+    expect(relationMappings).toStrictEqual(expectedRelations);
+  });
+
+  describe.todo('reconnectable');
+
+  describe('encryptData', () => {
+    it('should return undefined if eligibleForEncryption is not true', async () => {
+      vi.spyOn(Connection.prototype, 'eligibleForEncryption').mockReturnValue(
+        false
+      );
+
+      const connection = new Connection();
+
+      expect(connection.encryptData()).toBeUndefined();
+    });
+
+    it('should encrypt formattedData and set it to data', async () => {
+      vi.spyOn(Connection.prototype, 'eligibleForEncryption').mockReturnValue(
+        true
+      );
+
+      const formattedData = {
+        key: 'value',
+      };
+
+      const connection = new Connection();
+      connection.formattedData = formattedData;
+      connection.encryptData();
+
+      const expectedDecryptedValue = JSON.parse(
+        AES.decrypt(connection.data, appConfig.encryptionKey).toString(enc)
+      );
+
+      expect(formattedData).toStrictEqual(expectedDecryptedValue);
+      expect(connection.data).not.toEqual(formattedData);
+    });
+
+    it('should encrypt formattedData and remove formattedData', async () => {
+      vi.spyOn(Connection.prototype, 'eligibleForEncryption').mockReturnValue(
+        true
+      );
+
+      const formattedData = {
+        key: 'value',
+      };
+
+      const connection = new Connection();
+      connection.formattedData = formattedData;
+      connection.encryptData();
+
+      expect(connection.formattedData).not.toBeDefined();
+    });
+  });
+
+  describe('decryptData', () => {
+    it('should return undefined if eligibleForDecryption is not true', () => {
+      vi.spyOn(Connection.prototype, 'eligibleForDecryption').mockReturnValue(
+        false
+      );
+
+      const connection = new Connection();
+
+      expect(connection.decryptData()).toBeUndefined();
+    });
+
+    it('should decrypt data and set it to formattedData', async () => {
+      vi.spyOn(Connection.prototype, 'eligibleForDecryption').mockReturnValue(
+        true
+      );
+
+      const formattedData = {
+        key: 'value',
+      };
+
+      const data = AES.encrypt(
+        JSON.stringify(formattedData),
+        appConfig.encryptionKey
+      ).toString();
+
+      const connection = new Connection();
+      connection.data = data;
+      connection.decryptData();
+
+      expect(connection.formattedData).toStrictEqual(formattedData);
+      expect(connection.data).not.toEqual(formattedData);
+    });
+  });
+});