Fix two redefined test methods.
diff --git a/Lib/test/test_csv.py b/Lib/test/test_csv.py
index bb354b9..196d18c 100644
--- a/Lib/test/test_csv.py
+++ b/Lib/test/test_csv.py
@@ -549,10 +549,10 @@
     def test_null(self):
         self.writerAssertEqual([], '')
 
-    def test_single(self):
+    def test_single_writer(self):
         self.writerAssertEqual([['abc']], 'abc\r\n')
 
-    def test_simple(self):
+    def test_simple_writer(self):
         self.writerAssertEqual([[1, 2, 'abc', 3, 4]], '1,2,abc,3,4\r\n')
 
     def test_quotes(self):