Disable flaky pyopenssl test

test/extra/pyopenssl_test.py

@@ -10,12 +10,18 @@ PYOPENSSL_DIR = os.path.abspath(os.path.join(ENV_NAME, "site-packages", "OpenSSL
 packages = ["nose==1.3.7", "pycparser==2.13", "cryptography==1.0.1", "pyopenssl==0.15.1", "pyasn1==0.1.7", "idna==2.0", "six==1.9.0", "enum34==1.0.4", "ipaddress==1.0.14", "cffi==1.1.0"]
 create_virtenv(ENV_NAME, packages, force_create = True)
 
+import subprocess
+
 # This particular test is bad; it depends on certain implementation details of the openssl library
 # it's linked against.  It fails in cpython and for other people as well
 # https://www.mail-archive.com/ports@openbsd.org/msg52063.html
-import subprocess
 subprocess.check_call(["sed", "-i", 's/\\(def test_digest.*\\)/\\1\\n        return/',
     os.path.join(PYOPENSSL_DIR, "test", "test_crypto.py")])
 
+# This particular test is bad; it fails if run close to a second-boundary
+# https://github.com/pyca/pyopenssl/issues/266
+subprocess.check_call(["sed", "-i", 's/\\(def test_export_test.*\\)/\\1\\n        return/',
+    os.path.join(PYOPENSSL_DIR, "test", "test_crypto.py")])
+
 expected = [{'ran': 438}]
 run_test([NOSETESTS_EXE], cwd=PYOPENSSL_DIR, expected=expected)