diff --git a/tests/gdal_vsi/__init__.py b/tests/gdal_vsi/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/gdal_vsi/test_vsi_file_system.py b/tests/gdal_vsi/test_vsi_file_system.py
new file mode 100644
index 000000000..6223e8627
--- /dev/null
+++ b/tests/gdal_vsi/test_vsi_file_system.py
@@ -0,0 +1,146 @@
+from os.path import join
+import unittest
+
+from rastervision.pipeline.file_system import (get_tmp_dir, str_to_file,
+                                               LocalFileSystem)
+from rastervision.gdal_vsi.vsi_file_system import VsiFileSystem
+
+fs = VsiFileSystem
+
+
+class TestVsiFileSystem(unittest.TestCase):
+    def test_uri_to_vsi_path(self):
+        self.assertEqual(fs.uri_to_vsi_path('/a/b/c'), '/a/b/c')
+        self.assertEqual(fs.uri_to_vsi_path('http://a/b/c'), '/vsicurl/a/b/c')
+        self.assertEqual(fs.uri_to_vsi_path('https://a/b/c'), '/vsicurl/a/b/c')
+        self.assertEqual(fs.uri_to_vsi_path('ftp://a/b/c'), '/vsicurl/a/b/c')
+        self.assertEqual(fs.uri_to_vsi_path('s3://a/b/c'), '/vsis3/a/b/c')
+        self.assertEqual(fs.uri_to_vsi_path('gs://a/b/c'), '/vsigs/a/b/c')
+
+    def test_uri_to_vsi_path_archive(self):
+        with self.assertRaises(ValueError):
+            _ = fs.uri_to_vsi_path('wrongscheme+s3://a/b!c')
+
+        self.assertEqual(
+            fs.uri_to_vsi_path('zip+s3://a/b!c'), '/vsizip/vsis3/a/b/c')
+        self.assertEqual(
+            fs.uri_to_vsi_path('gzip+s3://a/b!c'), '/vsigzip/vsis3/a/b/c')
+        self.assertEqual(
+            fs.uri_to_vsi_path('tar+s3://a/b!c'), '/vsitar/vsis3/a/b/c')
+
+    def test_matches_uri(self):
+        self.assertFalse(fs.matches_uri('/a/b/c', 'r'))
+        self.assertTrue(fs.matches_uri('/vsis3/a/b/c', 'r'))
+        self.assertTrue(fs.matches_uri('/vsis3/a/b/c', 'w'))
+        self.assertTrue(fs.matches_uri('/vsicurl/a/b/c', 'r'))
+        self.assertFalse(fs.matches_uri('/vsicurl/a/b/c', 'w'))
+
+    def test_local_path(self):
+        vsipath = '/vsicurl/a/b/c'
+        self.assertEqual(fs.local_path(vsipath, '/'), '/c')
+
+    def test_read_write_bytes(self):
+        with get_tmp_dir() as tmp_dir:
+            path = join(tmp_dir, 'test.bin')
+            path_vsi = fs.uri_to_vsi_path(path)
+            bytes_in = bytes([0x00, 0x01, 0x02])
+            fs.write_bytes(path_vsi, bytes_in)
+            bytes_out = fs.read_bytes(path_vsi)
+            self.assertEqual(bytes_in, bytes_out)
+
+        with self.assertRaises(FileNotFoundError):
+            fs.read_bytes(path_vsi)
+
+    def test_read_write_str(self):
+        with get_tmp_dir() as tmp_dir:
+            path = join(tmp_dir, 'test.txt')
+            path_vsi = fs.uri_to_vsi_path(path)
+            str_in = 'abc'
+            fs.write_str(path_vsi, str_in)
+            str_out = fs.read_str(path_vsi)
+            self.assertEqual(str_in, str_out)
+
+    def test_list_paths(self):
+        with get_tmp_dir() as tmp_dir:
+            dir_vsi = fs.uri_to_vsi_path(tmp_dir)
+            str_to_file('abc', join(tmp_dir, '1.txt'))
+            str_to_file('def', join(tmp_dir, '2.txt'))
+            str_to_file('ghi', join(tmp_dir, '3.tiff'))
+            paths = fs.list_paths(dir_vsi, ext='txt')
+            self.assertListEqual(
+                paths, [join(tmp_dir, '1.txt'),
+                        join(tmp_dir, '2.txt')])
+
+    def test_sync_to_from(self):
+        with get_tmp_dir() as src, get_tmp_dir() as dst:
+            src_vsi = fs.uri_to_vsi_path(src)
+            dst_vsi = fs.uri_to_vsi_path(dst)
+            str_to_file('abc', join(src, '1.txt'))
+            str_to_file('def', join(src, '2.txt'))
+            str_to_file('ghi', join(src, 'subdir', '3.txt'))
+            fs.sync_to_dir(src_vsi, dst_vsi, delete=True)
+            paths = fs.list_paths(dst_vsi)
+            self.assertListEqual(paths, [
+                join(dst, 'subdir'),
+                join(dst, '1.txt'),
+                join(dst, '2.txt'),
+            ])
+            paths = fs.list_paths(dst_vsi, ext='txt')
+            self.assertListEqual(paths, [
+                join(dst, '1.txt'),
+                join(dst, '2.txt'),
+            ])
+            paths = fs.list_paths(join(dst_vsi, 'subdir'))
+            self.assertListEqual(paths, [join(dst, 'subdir', '3.txt')])
+
+            with self.assertRaises(FileExistsError):
+                fs.sync_to_dir(src_vsi, dst_vsi, delete=False)
+
+            with self.assertRaises(ValueError):
+                fs.sync_to_dir(join(src, '1.txt'), dst_vsi, delete=True)
+
+            fs.sync_from_dir(src_vsi, dst_vsi, delete=True)
+            paths = fs.list_paths(src_vsi)
+            self.assertListEqual(paths, [
+                join(src, 'subdir'),
+                join(src, '1.txt'),
+                join(src, '2.txt'),
+            ])
+            paths = fs.list_paths(src_vsi, ext='txt')
+            self.assertListEqual(paths, [
+                join(src, '1.txt'),
+                join(src, '2.txt'),
+            ])
+            paths = fs.list_paths(join(src, 'subdir'))
+            self.assertListEqual(paths, [join(src, 'subdir', '3.txt')])
+
+            with self.assertRaises(FileExistsError):
+                fs.sync_from_dir(src_vsi, dst_vsi, delete=False)
+
+            with self.assertRaises(ValueError):
+                fs.sync_from_dir(src_vsi, join(dst, '1.txt'), delete=True)
+
+            with self.assertRaises(ValueError):
+                fs.sync_from_dir(join(src, '1.txt'), dst_vsi, delete=True)
+
+    def test_last_modified(self):
+        with get_tmp_dir() as tmp_dir:
+            path = join(tmp_dir, '1.txt')
+            str_to_file('abc', path)
+            path_vsi = fs.uri_to_vsi_path(path)
+            self.assertEqual(
+                fs.last_modified(path_vsi).timestamp(),
+                int(LocalFileSystem.last_modified(path).timestamp()))
+
+    def test_file_exists(self):
+        with get_tmp_dir() as tmp_dir:
+            path = join(tmp_dir, '1.txt')
+            str_to_file('abc', path)
+            path_vsi = fs.uri_to_vsi_path(path)
+            self.assertTrue(fs.file_exists(path_vsi, include_dir=False))
+            dir_vsi = fs.uri_to_vsi_path(tmp_dir)
+            self.assertTrue(fs.file_exists(dir_vsi))
+
+
+if __name__ == '__main__':
+    unittest.main()