diff -r 0d5da548b80a Lib/test/test_tracemalloc.py
--- a/Lib/test/test_tracemalloc.py	Mon Nov 25 05:16:09 2013 +0200
+++ b/Lib/test/test_tracemalloc.py	Mon Nov 25 14:42:19 2013 +0800
@@ -1,6 +1,4 @@
-import _tracemalloc
 import contextlib
-import datetime
 import os
 import sys
 import tracemalloc
@@ -89,7 +87,7 @@
         tracemalloc.stop()
 
     def test_get_tracemalloc_memory(self):
-        data = [allocate_bytes(123) for count in range(1000)]
+        [allocate_bytes(123) for count in range(1000)]
         size = tracemalloc.get_tracemalloc_memory()
         self.assertGreaterEqual(size, 0)
 
@@ -207,7 +205,7 @@
         size, max_size = tracemalloc.get_traced_memory()
         self.assertGreater(size, 0)
 
-        # stop() rests also traced memory counters
+        # stop() also resets traced memory counters
         tracemalloc.stop()
         self.assertEqual(tracemalloc.get_traced_memory(), (0, 0))
 
@@ -729,7 +727,7 @@
         stdout = stdout.rstrip()
         self.assertEqual(stdout, b'False')
 
-        # PYTHON* environment varibles must be ignored when -E option is
+        # PYTHON* environment variables must be ignored when -E option is
         # present
         code = 'import tracemalloc; print(tracemalloc.is_tracing())'
         ok, stdout, stderr = assert_python_ok('-E', '-c', code, PYTHONTRACEMALLOC='1')