diff --git a/setup.py b/setup.py
index 110441dca..548e2bc93 100644
--- a/setup.py
+++ b/setup.py
@@ -44,6 +44,7 @@ install_requires = [
 
 
 tests_require = [
+    'ddt >= 1.2.2, < 2',
     'pytest < 6',
 ]
 
@@ -59,6 +60,7 @@ extras_require = {
                                 'ipaddress >= 1.0.16, < 2'],
     ':sys_platform == "win32"': ['colorama >= 0.4, < 1'],
     'socks': ['PySocks >= 1.5.6, != 1.5.7, < 2'],
+    'tests': tests_require,
 }