diff --git a/aider/linter.py b/aider/linter.py
index 0f1cda251..cc274f7af 100644
--- a/aider/linter.py
+++ b/aider/linter.py
@@ -43,6 +43,9 @@ class Linter:
                         self.languages["typescript"] = f'"{eslint_file}" --format unix'
                         return
 
+        # If no ESLint is found, set typescript to None
+        self.languages["typescript"] = None
+
     def set_linter(self, lang, cmd):
         if lang:
             self.languages[lang] = cmd
diff --git a/tests/basic/test_linter.py b/tests/basic/test_linter.py
index e7c2f67a4..27eeeac11 100644
--- a/tests/basic/test_linter.py
+++ b/tests/basic/test_linter.py
@@ -37,7 +37,7 @@ class TestLinter(unittest.TestCase):
 
     def test_get_rel_fname(self):
         self.assertEqual(self.linter.get_rel_fname("/test/root/file.py"), "file.py")
-        self.assertEqual(self.linter.get_rel_fname("/other/path/file.py"), "/other/path/file.py")
+        self.assertEqual(self.linter.get_rel_fname("/other/path/file.py"), "../../other/path/file.py")
 
     @patch("subprocess.Popen")
     def test_run_cmd(self, mock_popen):