diff --git a/api/src/unraid-api/unraid-file-modifier/__snapshots__/unraid-file-modifier.spec.ts.snap b/api/src/unraid-api/unraid-file-modifier/__snapshots__/unraid-file-modifier.spec.ts.snap
new file mode 100644
index 000000000..6fc335f7f
--- /dev/null
+++ b/api/src/unraid-api/unraid-file-modifier/__snapshots__/unraid-file-modifier.spec.ts.snap
@@ -0,0 +1,3 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`FileModificationService > should apply modifications 1`] = `[Error: Application not implemented.]`;
diff --git a/api/src/unraid-api/unraid-file-modifier/unraid-file-modifier.spec.ts b/api/src/unraid-api/unraid-file-modifier/unraid-file-modifier.spec.ts
index 5b9d9e66a..f8c1096ad 100644
--- a/api/src/unraid-api/unraid-file-modifier/unraid-file-modifier.spec.ts
+++ b/api/src/unraid-api/unraid-file-modifier/unraid-file-modifier.spec.ts
@@ -1,11 +1,59 @@
+import { Logger } from '@nestjs/common';
 import { Test, TestingModule } from '@nestjs/testing';
 
-import { UnraidFileModificationService } from '@app/unraid-api/unraid-file-modifier/unraid-file-modifier.service';
+import { beforeAll, beforeEach, describe, expect, it, vi } from 'vitest';
+
+import {
+    FileModification,
+    UnraidFileModificationService,
+} from '@app/unraid-api/unraid-file-modifier/unraid-file-modifier.service';
+
+class TestFileModification implements FileModification {
+    constructor(
+        public applyImplementation?: () => Promise<void>,
+        public rollbackImplementation?: () => Promise<void>
+    ) {}
+    id = 'test';
+    async apply() {
+        if (this.applyImplementation) {
+            return this.applyImplementation();
+        }
+        throw new Error('Application not implemented.');
+    }
+    async rollback() {
+        if (this.rollbackImplementation) {
+            return this.rollbackImplementation();
+        }
+        throw new Error('Rollback not implemented.');
+    }
+    async shouldApply() {
+        return { shouldApply: true, reason: 'Always Apply this mod' };
+    }
+}
 
 describe('FileModificationService', () => {
+    let mockLogger: {
+        log: ReturnType<typeof vi.fn>;
+        error: ReturnType<typeof vi.fn>;
+        warn: ReturnType<typeof vi.fn>;
+        debug: ReturnType<typeof vi.fn>;
+        verbose: ReturnType<typeof vi.fn>;
+    };
     let service: UnraidFileModificationService;
-
     beforeEach(async () => {
+        mockLogger = {
+            log: vi.fn(),
+            error: vi.fn(),
+            warn: vi.fn(),
+            debug: vi.fn(),
+            verbose: vi.fn(),
+        };
+        // Mock the Logger constructor
+        vi.spyOn(Logger.prototype, 'log').mockImplementation(mockLogger.log);
+        vi.spyOn(Logger.prototype, 'error').mockImplementation(mockLogger.error);
+        vi.spyOn(Logger.prototype, 'warn').mockImplementation(mockLogger.warn);
+        vi.spyOn(Logger.prototype, 'debug').mockImplementation(mockLogger.debug);
+        vi.spyOn(Logger.prototype, 'verbose').mockImplementation(mockLogger.verbose);
         const module: TestingModule = await Test.createTestingModule({
             providers: [UnraidFileModificationService],
         }).compile();
@@ -20,5 +68,35 @@ describe('FileModificationService', () => {
     it('should load modifications', async () => {
         const mods = await service.loadModifications();
         expect(mods).toHaveLength(2);
-    })
+    });
+
+    it('should apply modifications', async () => {
+        await expect(
+            service.applyModification(new TestFileModification())
+        ).rejects.toThrowErrorMatchingSnapshot();
+    });
+
+    it('should not rollback any mods without loaded', async () => {
+        await expect(service.rollbackAll()).resolves.toBe(undefined);
+    });
+
+    it('should rollback all mods', async () => {
+        await service.loadModifications();
+        const applyFn = vi.fn();
+        const rollbackFn = vi.fn();
+        await service.applyModification(new TestFileModification(applyFn, rollbackFn));
+        await expect(service.rollbackAll()).resolves.toBe(undefined);
+        expect(mockLogger.error).not.toHaveBeenCalled();
+        expect(mockLogger.log).toHaveBeenCalledTimes(5);
+        expect(applyFn).toHaveBeenCalled();
+        expect(rollbackFn).toHaveBeenCalled();
+        expect(mockLogger.log).toHaveBeenNthCalledWith(1, 'RootTestModule dependencies initialized');
+        expect(mockLogger.log).toHaveBeenNthCalledWith(
+            2,
+            'Applying modification: test - Always Apply this mod'
+        );
+        expect(mockLogger.log).toHaveBeenNthCalledWith(3, 'Modification applied successfully: test');
+        expect(mockLogger.log).toHaveBeenNthCalledWith(4, 'Rolling back modification: test');
+        expect(mockLogger.log).toHaveBeenNthCalledWith(5, 'Modification rolled back successfully: test');
+    });
 });