diff --git a/Makefile b/Makefile
index 279f0d4..2392d8d 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,9 @@ host_deps:
 python_lint:
 	./m.py mypy -- -f vscode 2>&1 | less
 
+python_tests:
+	./m.py tests
+
 #python_clean_online_fxreader_vpn:
 #	rm -fr \
 #		deps/com.github.aiortc.aiortc/src/online_fxreader/vpn/dist;
diff --git a/python/cli.py b/python/cli.py
index 26a704e..3e9e031 100644
--- a/python/cli.py
+++ b/python/cli.py
@@ -26,6 +26,7 @@ logger = logging.getLogger(__name__)
 class Command(enum.StrEnum):
     mypy = 'mypy'
     deploy_wheel = 'deploy:wheel'
+    tests = 'tests'
 
 @dataclasses.dataclass
 class Settings(
@@ -145,8 +146,17 @@ class CLI(_cli.CLI):
             self.mypy(
                 argv=args,
             )
+        elif options.command is Command.tests:
+            for k, v in self.projects.items():
+                subprocess.check_call([
+                    sys.executable,
+                    '-m',
+                    'unittest',
+                    'online.fxreader.pr34.tests.test_crypto',
+                    *args,
+                ], cwd=str(v.source_dir))
         else:
             raise NotImplementedError
 
 if __name__ == '__main__':
-    CLI().run()
\ No newline at end of file
+    CLI().run()
diff --git a/python/online/fxreader/pr34/commands_typed/crypto.py b/python/online/fxreader/pr34/commands_typed/crypto.py
index 721d81d..fb20856 100644
--- a/python/online/fxreader/pr34/commands_typed/crypto.py
+++ b/python/online/fxreader/pr34/commands_typed/crypto.py
@@ -45,7 +45,7 @@ class PasswordUtils:
       return (salt, hashed_secret)
     elif mode == 'base64':
       res_tuple = tuple((
-        base64.b64encode(o, width=0).decode('utf-8')
+        base64.b64encode(o).decode('utf-8')
         for o in (salt, hashed_secret,)
       ))
       return (res_tuple[0], res_tuple[1])
diff --git a/python/online/fxreader/pr34/tests/__init__.py b/python/online/fxreader/pr34/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/python/online/fxreader/pr34/tests/test_crypto.py b/python/online/fxreader/pr34/tests/test_crypto.py
new file mode 100644
index 0000000..f4da055
--- /dev/null
+++ b/python/online/fxreader/pr34/tests/test_crypto.py
@@ -0,0 +1,19 @@
+from online.fxreader.pr34.commands_typed import crypto
+import unittest
+
+
+class TestCrypto(unittest.TestCase):
+    def test_password_utils(self):
+        salt = b'asdfasdfasdf'
+
+        self.assertEqual(
+            crypto.PasswordUtils.encrypt(
+                'blah',
+                mode='bytes',
+                salt=salt,
+            ),
+            [
+                salt,
+                b'asdfasdf',
+            ]
+        )