diff --git a/packages/cli/src/ui/components/shared/text-buffer.test.ts b/packages/cli/src/ui/components/shared/text-buffer.test.ts
index 85754f9f62..43f9e53700 100644
--- a/packages/cli/src/ui/components/shared/text-buffer.test.ts
+++ b/packages/cli/src/ui/components/shared/text-buffer.test.ts
@@ -1023,7 +1023,7 @@ describe('useTextBuffer', () => {
         useTextBuffer({ viewport, escapePastedPaths: true }),
       );
       act(() => result.current.insert(filePath, { paste: true }));
-      expect(getBufferState(result).text).toBe(`@${filePath} `);
+      expect(getBufferState(result).text).toBe(`@${escapePath(filePath)} `);
     });
 
     it('should not prepend @ to an invalid file path on insert', () => {
@@ -1042,7 +1042,7 @@ describe('useTextBuffer', () => {
       );
       const quotedPath = `'${filePath}'`;
       act(() => result.current.insert(quotedPath, { paste: true }));
-      expect(getBufferState(result).text).toBe(`@${filePath} `);
+      expect(getBufferState(result).text).toBe(`@${escapePath(filePath)} `);
     });
 
     it('should not prepend @ to short text that is not a path', () => {
@@ -1065,7 +1065,9 @@ describe('useTextBuffer', () => {
       );
       const filePaths = `${file1} ${file2}`;
       act(() => result.current.insert(filePaths, { paste: true }));
-      expect(getBufferState(result).text).toBe(`@${file1} @${file2} `);
+      expect(getBufferState(result).text).toBe(
+        `@${escapePath(file1)} @${escapePath(file2)} `,
+      );
     });
 
     it('should handle multiple paths with escaped spaces', () => {
@@ -1083,7 +1085,7 @@ describe('useTextBuffer', () => {
 
       act(() => result.current.insert(filePaths, { paste: true }));
       expect(getBufferState(result).text).toBe(
-        `@${escapePath(file1)} @${file2} `,
+        `@${escapePath(file1)} @${escapePath(file2)} `,
       );
     });
 
diff --git a/packages/cli/src/ui/hooks/atCommandProcessor.test.ts b/packages/cli/src/ui/hooks/atCommandProcessor.test.ts
index 76848ea821..9e925364c2 100644
--- a/packages/cli/src/ui/hooks/atCommandProcessor.test.ts
+++ b/packages/cli/src/ui/hooks/atCommandProcessor.test.ts
@@ -285,6 +285,16 @@ describe('handleAtCommand', () => {
   });
 
   it('should correctly unescape paths with escaped spaces', async () => {
+    // Mock platform to linux so unescapePath handles backslash escapes
+    vi.stubGlobal(
+      'process',
+      Object.create(process, {
+        platform: {
+          get: () => 'linux',
+        },
+      }),
+    );
+
     const fileContent = 'This is the file content.';
     const filePath = await createTestFile(
       path.join(testRootDir, 'path', 'to', 'my file.txt'),
@@ -955,6 +965,16 @@ describe('handleAtCommand', () => {
     });
 
     it('should still handle escaped spaces in paths before punctuation', async () => {
+      // Mock platform to linux so unescapePath handles backslash escapes
+      vi.stubGlobal(
+        'process',
+        Object.create(process, {
+          platform: {
+            get: () => 'linux',
+          },
+        }),
+      );
+
       const fileContent = 'Spaced file content';
       const filePath = await createTestFile(
         path.join(testRootDir, 'spaced file.txt'),
diff --git a/packages/cli/src/ui/hooks/useAtCompletion.test.ts b/packages/cli/src/ui/hooks/useAtCompletion.test.ts
index 7c41b7593d..518a27d30b 100644
--- a/packages/cli/src/ui/hooks/useAtCompletion.test.ts
+++ b/packages/cli/src/ui/hooks/useAtCompletion.test.ts
@@ -13,6 +13,7 @@ import type { Config, FileSearch } from '@google/gemini-cli-core';
 import {
   FileSearchFactory,
   FileDiscoveryService,
+  escapePath,
 } from '@google/gemini-cli-core';
 import type { FileSystemStructure } from '@google/gemini-cli-test-utils';
 import { createTmpDir, cleanupTmpDir } from '@google/gemini-cli-test-utils';
@@ -64,6 +65,7 @@ describe('useAtCompletion', () => {
       await cleanupTmpDir(testRootDir);
     }
     vi.restoreAllMocks();
+    vi.unstubAllGlobals();
   });
 
   describe('File Search Logic', () => {
@@ -90,7 +92,7 @@ describe('useAtCompletion', () => {
         'src/',
         'src/components/',
         'file.txt',
-        'src/components/Button\\ with\\ spaces.tsx',
+        escapePath('src/components/Button with spaces.tsx'),
         'src/components/Button.tsx',
         'src/index.js',
       ]);