diff -r 4b64a049f451 Lib/test/test_site.py
--- a/Lib/test/test_site.py	Fri Aug 19 12:00:13 2016 +0300
+++ b/Lib/test/test_site.py	Sat Aug 20 08:06:05 2016 +1000
@@ -444,8 +444,13 @@
     def test_startup_imports(self):
         # This tests checks which modules are loaded by Python when it
         # initially starts upon startup.
-        popen = subprocess.Popen([sys.executable, '-I', '-v', '-c',
-                                  'import sys; print(set(sys.modules))'],
+        popen = subprocess.Popen([sys.executable, '-I', '-S', '-v', '-c',
+                                 ('import sys, site;'
+                                 # Prevent .pth files from disrupting the test
+                                 # http://bugs.python.org/issue27807
+                                 'site.addpackage=lambda *a: None;'
+                                 'site.main();'
+                                 'print(set(sys.modules))')],
                                  stdout=subprocess.PIPE,
                                  stderr=subprocess.PIPE)
         stdout, stderr = popen.communicate()