diff --git a/setup.py b/setup.py
index 5ba84e06..5cba5d9e 100644
--- a/setup.py
+++ b/setup.py
@@ -108,6 +108,10 @@ CLASSIFIERS = [
     "Topic :: Software Development :: Libraries :: Python Modules",
 ]
 
+PYTHON_VERSION = sys.version_info[0]
+PY3 = PYTHON_VERSION == 3
+PY2 = PYTHON_VERSION == 2
+
 extra_opts = {
     "packages": find_packages(exclude=["tests", "tests.*"]),
     "tests_require": [
@@ -116,9 +120,10 @@ extra_opts = {
         "coverage<5.0",  # recent coverage switched to sqlite format for the .coverage file which isn't handled properly by coveralls
         "blinker",
         "Pillow>=2.0.0, <7.0.0",  # 7.0.0 dropped Python2 support
+        "zipp<2.0.0",  # (dependency of pytest) dropped python2 support
     ],
 }
-if sys.version_info[0] == 3:
+if PY3:
     extra_opts["use_2to3"] = True
     if "test" in sys.argv:
         extra_opts["packages"] = find_packages()