Index: Lib/test/regrtest.py
===================================================================
--- Lib/test/regrtest.py	(revision 75216)
+++ Lib/test/regrtest.py	(working copy)
@@ -467,12 +467,11 @@
             if trace:
                 # If we're tracing code coverage, then we don't exit with status
                 # if on a false return value from main.
-                tracer.runctx('runtest(test, verbose, quiet, testdir)',
+                tracer.runctx('runtest(test, verbose, quiet)',
                               globals=globals(), locals=vars())
             else:
                 try:
-                    result = runtest(test, verbose, quiet,
-                                     testdir, huntrleaks)
+                    result = runtest(test, verbose, quiet, huntrleaks)
                     accumulate_result(test, result)
                 except KeyboardInterrupt:
                     # print a newline separate from the ^C
@@ -536,8 +535,7 @@
             sys.stdout.flush()
             try:
                 test_support.verbose = True
-                ok = runtest(test, True, quiet, testdir,
-                             huntrleaks)
+                ok = runtest(test, True, quiet, huntrleaks)
             except KeyboardInterrupt:
                 # print a newline separate from the ^C
                 print
@@ -600,15 +598,13 @@
     tests.sort()
     return stdtests + tests
 
-def runtest(test, verbose, quiet,
-            testdir=None, huntrleaks=False, use_resources=None):
+def runtest(test, verbose, quiet, huntrleaks=False, use_resources=None):
     """Run a single test.
 
     test -- the name of the test
     verbose -- if true, print more messages
     quiet -- if true, don't print 'skipped' messages (probably redundant)
     test_times -- a list of (time, test_name) pairs
-    testdir -- test directory
     huntrleaks -- run multiple times to test for leaks; requires a debug
                   build; a triple corresponding to -R's three arguments
     Return:
@@ -622,16 +618,12 @@
     if use_resources is not None:
         test_support.use_resources = use_resources
     try:
-        return runtest_inner(test, verbose, quiet,
-                             testdir, huntrleaks)
+        return runtest_inner(test, verbose, quiet, huntrleaks)
     finally:
         cleanup_test_droppings(test, verbose)
 
-def runtest_inner(test, verbose, quiet,
-                  testdir=None, huntrleaks=False):
+def runtest_inner(test, verbose, quiet, huntrleaks=False):
     test_support.unload(test)
-    if not testdir:
-        testdir = findtestdir()
     if verbose:
         capture_stdout = None
     else: