adding method to url tests

tests/test_requests.py

@@ -2265,7 +2265,7 @@ class TestPreparingURLs(object):
         )
     )
     def test_preparing_url(self, url, expected):
-        r = requests.Request(url=url)
+        r = requests.Request('GET', url=url)
         p = r.prepare()
         assert p.url == expected
 
@@ -2279,6 +2279,6 @@ class TestPreparingURLs(object):
         )
     )
     def test_preparing_bad_url(self, url):
-        r = requests.Request(url=url)
+        r = requests.Request('GET', url=url)
         with pytest.raises(requests.exceptions.InvalidURL):
             r.prepare()