diff --git a/csst_common/file.py b/csst_common/file.py
index 5fa0e5623c359f78b48719dbfe1687f41987cb1f..0197136e376fb07404776b7d9b620294cd35ef73 100644
--- a/csst_common/file.py
+++ b/csst_common/file.py
@@ -86,7 +86,7 @@ class File:
             f"{self.obs_id if obs_id is None else str(obs_id)}_"
             f"{self.detector if detector is None else str(detector)}_"
             f"L{self.level if level is None else str(level)}_"
-            f"V{self.version if version is None else str(version)}"
+            f"V{self.version if version is None else str(version).zfill(2)}"
             f"{self.ext if ext is None else str(ext)}",
         )
 
diff --git a/tests/test_file.py b/tests/test_file.py
index 97fed43f890d7f737dedf202f39c2ee39db301c9..4c051f82b1a0b955e23a865277782777c17fdf32 100644
--- a/tests/test_file.py
+++ b/tests/test_file.py
@@ -21,3 +21,41 @@ class TestFile(unittest.TestCase):
         )
         file = File(file_path, new_dir="/pipeline/output")
         self.assertTrue(file.mo.groupdict() is not None)
+        self.assertEqual(
+            file.derive0(),
+            (
+                "/pipeline/output/"
+                "CSST_MSC_MS_SCIE_20270719043315_20270719043545_10160000072_07_L0_V01.fits"
+            ),
+        )
+
+        self.assertEqual(
+            file.derive1(),
+            (
+                "/pipeline/output/"
+                "CSST_MSC_MS_SCIE_20270719043315_20270719043545_10160000072_07_L1_V01.fits"
+            ),
+        )
+        self.assertEqual(
+            file.derive1(version=2),
+            (
+                "/pipeline/output/"
+                "CSST_MSC_MS_SCIE_20270719043315_20270719043545_10160000072_07_L1_V02.fits"
+            ),
+        )
+
+        self.assertEqual(
+            file.derive2(),
+            (
+                "/pipeline/output/"
+                "CSST_MSC_MS_SCIE_20270719043315_20270719043545_10160000072_07_L2_V01.fits"
+            ),
+        )
+
+        self.assertEqual(
+            file.derive2(ext=".cat"),
+            (
+                "/pipeline/output/"
+                "CSST_MSC_MS_SCIE_20270719043315_20270719043545_10160000072_07_L2_V01.cat"
+            ),
+        )