Neaten the environment modification using triple-quotes and dict.update

test/02_test/cibuildwheel_test.py

@@ -6,11 +6,13 @@ def test():
     project_dir = os.path.dirname(__file__)
     # set up the environment
     env = os.environ.copy()
-    env['CIBW_TEST_REQUIRES'] = 'nose'
-    # the 'false ||' bit is to ensure this command runs in a shell on
-    # mac/linux.
-    env['CIBW_TEST_COMMAND'] = 'false || nosetests {project}/test'
-    env['CIBW_TEST_COMMAND_WINDOWS'] = 'nosetests {project}/test'
+    env.update({
+        'CIBW_TEST_REQUIRES': 'nose',
+        # the 'false ||' bit is to ensure this command runs in a shell on
+        # mac/linux.
+        'CIBW_TEST_COMMAND': 'false || nosetests {project}/test',
+        'CIBW_TEST_COMMAND_WINDOWS': 'nosetests {project}/test',
+    })
 
     # build & test the wheels
     subprocess.check_call([sys.executable, '-m', 'cibuildwheel', project_dir], env=env)