diff --git a/Lib/test/test_tools.py b/Lib/test/test_tools.py
--- a/Lib/test/test_tools.py
+++ b/Lib/test/test_tools.py
@@ -18,7 +18,7 @@
 # and run the tests in that case too?
 raise unittest.SkipTest('test irrelevant for an installed Python')
 
-srcdir = sysconfig.get_config_var('projectbase')
+srcdir = sysconfig.get_config_var('srcdir')
 basepath = os.path.join(os.getcwd(), srcdir, 'Tools')
 scriptsdir = os.path.join(basepath, 'scripts')
 
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