diff --git a/connexion/__init__.py b/connexion/__init__.py
index 902e0be..8009f4a 100755
--- a/connexion/__init__.py
+++ b/connexion/__init__.py
@@ -37,14 +37,13 @@ except ImportError:  # pragma: no cover
 App = FlaskApp
 Api = FlaskApi
 
-if sys.version_info >= (3, 5, 3):  # pragma: no cover
-    try:
-        from .apis.aiohttp_api import AioHttpApi
-        from .apps.aiohttp_app import AioHttpApp
-    except ImportError:  # pragma: no cover
-        _aiohttp_not_installed_error = not_installed_error()
-        AioHttpApi = _aiohttp_not_installed_error
-        AioHttpApp = _aiohttp_not_installed_error
+try:
+    from .apis.aiohttp_api import AioHttpApi
+    from .apps.aiohttp_app import AioHttpApp
+except ImportError:  # pragma: no cover
+    _aiohttp_not_installed_error = not_installed_error()
+    AioHttpApi = _aiohttp_not_installed_error
+    AioHttpApp = _aiohttp_not_installed_error
 
 # This version is replaced during release process.
 __version__ = '2018.0.dev1'
diff --git a/setup.py b/setup.py
index 2de1a6a..f2895cf 100755
--- a/setup.py
+++ b/setup.py
@@ -47,10 +47,9 @@ tests_require = [
     swagger_ui_require
 ]
 
-if sys.version_info >= (3, 5, 3):
-    tests_require.extend(aiohttp_require)
-    tests_require.append('pytest-aiohttp')
-    tests_require.append('aiohttp-remotes')
+tests_require.extend(aiohttp_require)
+tests_require.append('pytest-aiohttp')
+tests_require.append('aiohttp-remotes')
 
 
 class PyTest(TestCommand):
@@ -60,14 +59,8 @@ class PyTest(TestCommand):
     def initialize_options(self):
         TestCommand.initialize_options(self)
         self.cov = None
-        self.pytest_args = ['--cov', 'connexion', '--cov-report', 'term-missing', '-v']
-
-        if sys.version_info < (3, 5, 3):
-            self.pytest_args.append('--cov-config=py2-coveragerc')
-            self.pytest_args.append('--ignore=tests/aiohttp')
-        else:
-            self.pytest_args.append('--cov-config=py3-coveragerc')
-
+        self.pytest_args = ['--cov', 'connexion', '--cov-report', 'term-missing',
+                            '--cov-config=py3-coveragerc', '-v']
         self.cov_html = False
 
     def finalize_options(self):