diff --git a/models/Notification.test.ts b/models/Notification.test.ts
new file mode 100644
index 000000000..be4ec0b45
--- /dev/null
+++ b/models/Notification.test.ts
@@ -0,0 +1,83 @@
+import mongoose from 'mongoose';
+import { describe, it, expect } from 'vitest';
+import { Notification } from './Notification';
+
+describe('Notification Model', () => {
+  it('is compiled properly and exposed', () => {
+    expect(Notification).toBeDefined();
+    expect(Notification.modelName).toBe('Notification');
+  });
+
+  it('enforces required, unique, and lowercase fields on username', () => {
+    const usernamePath = Notification.schema.path('username') as mongoose.SchemaType & {
+      options: Record<string, unknown>;
+    };
+
+    expect(usernamePath).toBeDefined();
+    expect(usernamePath.options.required).toBe(true);
+    expect(usernamePath.options.unique).toBe(true);
+    expect(usernamePath.options.lowercase).toBe(true);
+    expect(usernamePath.options.trim).toBe(true);
+  });
+
+  it('enforces required, lowercase, and trim fields on email', () => {
+    const emailPath = Notification.schema.path('email') as mongoose.SchemaType & {
+      options: Record<string, unknown>;
+    };
+
+    expect(emailPath).toBeDefined();
+    expect(emailPath.options.required).toBe(true);
+    expect(emailPath.options.lowercase).toBe(true);
+    expect(emailPath.options.trim).toBe(true);
+  });
+
+  it('validates frequency field and its defaults and enums', () => {
+    const frequencyPath = Notification.schema.path('frequency') as mongoose.SchemaType & {
+      options: Record<string, unknown>;
+      enumValues: string[];
+    };
+
+    expect(frequencyPath).toBeDefined();
+    expect(frequencyPath.options.default).toBe('daily');
+    expect(frequencyPath.enumValues).toContain('realtime');
+    expect(frequencyPath.enumValues).toContain('daily');
+    expect(frequencyPath.enumValues).toContain('weekly');
+  });
+
+  it('checks boolean notification switches have default value as true', () => {
+    const notifyOnCommitPath = Notification.schema.path('notifyOnCommit') as mongoose.SchemaType & {
+      options: Record<string, unknown>;
+    };
+    const notifyOnStreakPath = Notification.schema.path('notifyOnStreak') as mongoose.SchemaType & {
+      options: Record<string, unknown>;
+    };
+    const notifyOnMilestonePath = Notification.schema.path(
+      'notifyOnMilestone'
+    ) as mongoose.SchemaType & {
+      options: Record<string, unknown>;
+    };
+
+    expect(notifyOnCommitPath.options.default).toBe(true);
+    expect(notifyOnStreakPath.options.default).toBe(true);
+    expect(notifyOnMilestonePath.options.default).toBe(true);
+  });
+
+  it('checks isActive default value is true', () => {
+    const isActivePath = Notification.schema.path('isActive') as mongoose.SchemaType & {
+      options: Record<string, unknown>;
+    };
+    expect(isActivePath.options.default).toBe(true);
+  });
+
+  it('checks createdAt and updatedAt have default values', () => {
+    const createdAtPath = Notification.schema.path('createdAt') as mongoose.SchemaType & {
+      options: Record<string, unknown>;
+    };
+    const updatedAtPath = Notification.schema.path('updatedAt') as mongoose.SchemaType & {
+      options: Record<string, unknown>;
+    };
+
+    expect(createdAtPath.options.default).toBeDefined();
+    expect(updatedAtPath.options.default).toBeDefined();
+  });
+});
diff --git a/vercel.json b/vercel.json
index 0fe65fc85..87597cf1c 100644
--- a/vercel.json
+++ b/vercel.json
@@ -1,3 +1,10 @@
 {
-  "ignoreCommand": "bash vercel-ignore.sh"
+  "ignoreCommand": "bash vercel-ignore.sh",
+  "git": {
+    "deploymentEnabled": {
+      "main": true,
+      "fix/issue-*": false,
+      "test/*": false
+    }
+  }
 }