Merge remote-tracking branch 'origin/python-updates' into core-updates

14 files changed, 394 insertions, 1016 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index 8f5cf46ee0..329a71f214 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -958,14 +958,13 @@ dist_patch_DATA =						\
   %D%/packages/patches/pygpgme-disable-problematic-tests.patch  \
   %D%/packages/patches/pyqt-configure.patch			\
   %D%/packages/patches/python-2-deterministic-build-info.patch	\
-  %D%/packages/patches/python-2.7-getentropy-on-old-kernels.patch	\
+  %D%/packages/patches/python-2.7-adjust-tests.patch		\
   %D%/packages/patches/python-2.7-search-paths.patch		\
   %D%/packages/patches/python-2.7-site-prefixes.patch		\
   %D%/packages/patches/python-2.7-source-date-epoch.patch	\
   %D%/packages/patches/python-3-deterministic-build-info.patch	\
   %D%/packages/patches/python-3-search-paths.patch		\
-  %D%/packages/patches/python-3.5-fix-tests.patch		\
-  %D%/packages/patches/python-3.5-getentropy-on-old-kernels.patch	\
+  %D%/packages/patches/python-3-fix-tests.patch			\
   %D%/packages/patches/python-dendropy-fix-tests.patch		\
   %D%/packages/patches/python-fix-tests.patch			\
   %D%/packages/patches/python-genshi-add-support-for-python-3.4-AST.patch	\
@@ -990,7 +989,8 @@ dist_patch_DATA =						\
   %D%/packages/patches/python2-pygobject-2-gi-info-type-error-domain.patch \
   %D%/packages/patches/python-pygpgme-fix-pinentry-tests.patch	\
   %D%/packages/patches/python2-subprocess32-disable-input-test.patch	\
-  %D%/packages/patches/python2-unittest2-remove-argparse.patch \
+  %D%/packages/patches/python-unittest2-python3-compat.patch	\
+  %D%/packages/patches/python-unittest2-remove-argparse.patch	\
   %D%/packages/patches/qt4-ldflags.patch			\
   %D%/packages/patches/qtscript-disable-tests.patch		\
   %D%/packages/patches/quagga-reproducible-build.patch          \
diff --git a/gnu/packages/backup.scm b/gnu/packages/backup.scm
index 00328cb344..895b3b168d 100644
--- a/gnu/packages/backup.scm
+++ b/gnu/packages/backup.scm
@@ -522,9 +522,7 @@ detection, and lossless compression.")
     (native-inputs
      `(("python-cython" ,python-cython)
        ("python-setuptools-scm" ,python-setuptools-scm)
-       ;; Borg 1.0.8's test suite uses 'tmpdir_factory', which was introduced in
-       ;; pytest 2.8.
-       ("python-pytest" ,python-pytest-3.0)
+       ("python-pytest" ,python-pytest)
        ;; For generating the documentation.
        ("python-sphinx" ,python-sphinx)
        ("python-guzzle-sphinx-theme" ,python-guzzle-sphinx-theme)))
diff --git a/gnu/packages/calendar.scm b/gnu/packages/calendar.scm
index f208bc0803..2e2bd33a2d 100644
--- a/gnu/packages/calendar.scm
+++ b/gnu/packages/calendar.scm
@@ -118,8 +118,7 @@ data units.")
                               "not test_printics_read_from_stdin "
                               "and not test_import_from_stdin"))))))))
     (native-inputs
-      ;; XXX Uses tmpdir_factory, introduced in pytest 2.8.
-     `(("python-pytest" ,python-pytest-3.0)
+     `(("python-pytest" ,python-pytest)
        ("python-pytest-cov" ,python-pytest-cov)
        ("python-setuptools-scm" ,python-setuptools-scm)
        ;; Required for tests
diff --git a/gnu/packages/databases.scm b/gnu/packages/databases.scm
index 24e3364d50..ceee88d82b 100644
--- a/gnu/packages/databases.scm
+++ b/gnu/packages/databases.scm
@@ -1814,7 +1814,7 @@ Memory-Mapped Database} (LMDB), a high-performance key-value store.")
              #t)))))
     (native-inputs
      `(("python-pytest-mock" ,python-pytest-mock)
-       ("python-pytest" ,python-pytest-3.0)
+       ("python-pytest" ,python-pytest)
        ("python-flexmock" ,python-flexmock)))
     (propagated-inputs
      `(("python-backpack" ,python-backpack)
diff --git a/gnu/packages/patches/python-2.7-adjust-tests.patch b/gnu/packages/patches/python-2.7-adjust-tests.patch
new file mode 100644
index 0000000000..12fe6e2e1e
--- /dev/null
+++ b/gnu/packages/patches/python-2.7-adjust-tests.patch
@@ -0,0 +1,22 @@
+SIGINT is ignored in the Guix build environment.
+
+--- a/Lib/test/test_regrtest.py
++++ b/Lib/test/test_regrtest.py
+@@ -399,6 +399,8 @@
+         output = self.run_tests('--fromfile', filename)
+         self.check_executed_tests(output, tests)
+ 
++    @unittest.skipIf(True,
++        "KeyboardInterrupts do not work in the build environment")
+     def test_interrupted(self):
+         code = TEST_INTERRUPTED
+         test = self.create_test('sigint', code=code)
+@@ -416,6 +418,8 @@
+                  % (self.TESTNAME_REGEX, len(tests)))
+         self.check_line(output, regex)
+ 
++    @unittest.skipIf(True,
++        "KeyboardInterrupts do not work in the build environment")
+     def test_slow_interrupted(self):
+         # Issue #25373: test --slowest with an interrupted test
+         code = TEST_INTERRUPTED
diff --git a/gnu/packages/patches/python-2.7-getentropy-on-old-kernels.patch b/gnu/packages/patches/python-2.7-getentropy-on-old-kernels.patch
deleted file mode 100644
index 5a09b4ac52..0000000000
--- a/gnu/packages/patches/python-2.7-getentropy-on-old-kernels.patch
+++ /dev/null
@@ -1,54 +0,0 @@
-This patch resolves a compatibility issue when compiled against glibc
-2.25
-and run runder kernels < 3.17:
-
-https://bugzilla.redhat.com/show_bug.cgi?id=1410175
-
-Upstream bug URLs:
-
-https://bugs.python.org/issue29157
-https://bugs.python.org/issue29188
-
-Patch adapted from upstream source repository:
-
-https://github.com/python/cpython/commit/01bdbad3e951014c58581635b94b22868537901c
-
-From 01bdbad3e951014c58581635b94b22868537901c Mon Sep 17 00:00:00 2001
-From: Victor Stinner <victor.stinner@gmail.com>
-Date: Mon, 9 Jan 2017 11:10:41 +0100
-Subject: [PATCH] Don't use getentropy() on Linux
-
-Issue #29188: Support glibc 2.24 on Linux: don't use getentropy() function but
-read from /dev/urandom to get random bytes, for example in os.urandom().  On
-Linux, getentropy() is implemented which getrandom() is blocking mode, whereas
-os.urandom() should not block.
----
- Misc/NEWS       |  5 +++++
- Python/random.c | 11 +++++++++--
- 2 files changed, 14 insertions(+), 2 deletions(-)
-
-diff --git a/Python/random.c b/Python/random.c
-index 57c41ffcd6..000cb36938 100644
---- a/Python/random.c
-+++ b/Python/random.c
-@@ -97,8 +97,15 @@ win32_urandom(unsigned char *buffer, Py_ssize_t size, int raise)
- }
- 
- /* Issue #25003: Don't use getentropy() on Solaris (available since
-- * Solaris 11.3), it is blocking whereas os.urandom() should not block. */
--#elif defined(HAVE_GETENTROPY) && !defined(sun)
-+   Solaris 11.3), it is blocking whereas os.urandom() should not block.
-+
-+   Issue #29188: Don't use getentropy() on Linux since the glibc 2.24
-+   implements it with the getrandom() syscall which can fail with ENOSYS,
-+   and this error is not supported in py_getentropy() and getrandom() is called
-+   with flags=0 which blocks until system urandom is initialized, which is not
-+   the desired behaviour to seed the Python hash secret nor for os.urandom():
-+   see the PEP 524 which was only implemented in Python 3.6. */
-+#elif defined(HAVE_GETENTROPY) && !defined(sun) && !defined(linux)
- #define PY_GETENTROPY 1
- 
- /* Fill buffer with size pseudo-random bytes generated by getentropy().
--- 
-2.12.0
-
diff --git a/gnu/packages/patches/python-3-fix-tests.patch b/gnu/packages/patches/python-3-fix-tests.patch
new file mode 100644
index 0000000000..ab713c54dd
--- /dev/null
+++ b/gnu/packages/patches/python-3-fix-tests.patch
@@ -0,0 +1,149 @@
+Additional test fixes which affect Python 3.5 (and presumably later) but not
+prior revisions of Python.
+
+--- Lib/test/test_pathlib.py     2014-03-01 03:02:36.088311000 +0100
++++ Lib/test/test_pathlib.py     2014-03-01 04:56:37.768311000 +0100
+@@ -2132,8 +2132,7 @@
+         self.assertEqual(given, expect)
+         self.assertEqual(set(p.rglob("FILEd*")), set())
+ 
+-    @unittest.skipUnless(hasattr(pwd, 'getpwall'),
+-                         'pwd module does not expose getpwall()')
++    @unittest.skipIf(True, "Guix builder home is '/' which causes trouble for these tests")
+     def test_expanduser(self):
+         P = self.cls
+         support.import_module('pwd')
+--- Lib/test/test_tarfile.py        2016-02-24 19:22:52.597208055 +0000
++++ Lib/test/test_tarfile.py     2016-02-24 20:50:48.941950135 +0000
+@@ -2305,11 +2305,14 @@
+     try:
+         import pwd, grp
+     except ImportError:
+         return False
+-    if pwd.getpwuid(0)[0] != 'root':
+-        return False
+-    if grp.getgrgid(0)[0] != 'root':
++    try:
++        if pwd.getpwuid(0)[0] != 'root':
++            return False
++        if grp.getgrgid(0)[0] != 'root':
++            return False
++    except KeyError:
+         return False
+     return True
+
+
+--- Lib/test/test_asyncio/test_base_events.py
++++ Lib/test/test_asyncio/test_base_events.py
+@@ -1216,6 +1216,8 @@
+         self._test_create_connection_ip_addr(m_socket, False)
+
+     @patch_socket
++    @unittest.skipUnless(support.is_resource_enabled('network'),
++                         'network is not enabled')
+     def test_create_connection_service_name(self, m_socket):
+         m_socket.getaddrinfo = socket.getaddrinfo
+         sock = m_socket.socket.return_value
+
+--- Lib/test/test_pdb.py.org    2017-03-12 03:09:01.991856701 +0100
++++ Lib/test/test_pdb.py        2017-03-12 03:26:17.742572869 +0100
+
+For some reason, KeyboardInterrupts do not work in the build
+environment (lack of controlling TTY?). Just change the expected
+outcome. Unfortunately, this will make it fail for users running
+`python -m test test_pdb test_pdb` interactively.
+
+@@ -928,11 +928,11 @@
+     > <doctest test.test_pdb.test_pdb_issue_20766[0]>(6)test_function()
+     -> print('pdb %d: %s' % (i, sess._previous_sigint_handler))
+     (Pdb) continue
+-    pdb 1: <built-in function default_int_handler>
++    pdb 1: Handlers.SIG_IGN
+     > <doctest test.test_pdb.test_pdb_issue_20766[0]>(5)test_function()
+     -> sess.set_trace(sys._getframe())
+     (Pdb) continue
+-    pdb 2: <built-in function default_int_handler>
++    pdb 2: Handlers.SIG_IGN
+     """
+
+ class PdbTestCase(unittest.TestCase):
+--- Lib/test/test_socket.py
++++ Lib/test/test_socket.py
+@@ -802,6 +802,8 @@
+         if not fqhn in all_host_names:
+             self.fail("Error testing host resolution mechanisms. (fqdn: %s, all: %s)" % (fqhn, repr(all_host_names)))
+ 
++    @unittest.skipUnless(support.is_resource_enabled('network'),
++                         'network is not enabled')
+     def test_host_resolution(self):
+         for addr in [support.HOST, '10.0.0.1', '255.255.255.255']:
+             self.assertEqual(socket.gethostbyname(addr), addr)
+--- Lib/test/test_spwd.py
++++ Lib/test/test_spwd.py
+@@ -5,8 +5,7 @@
+ spwd = support.import_module('spwd')
+ 
+ 
+-@unittest.skipUnless(hasattr(os, 'geteuid') and os.geteuid() == 0,
+-                     'root privileges required')
++@unittest.skipUnless(os.path.exists("/etc/shadow"), 'spwd tests require /etc/shadow')
+ class TestSpwdRoot(unittest.TestCase):
+ 
+     def test_getspall(self):
+@@ -56,8 +55,7 @@
+             self.assertRaises(TypeError, spwd.getspnam, bytes_name)
+ 
+ 
+-@unittest.skipUnless(hasattr(os, 'geteuid') and os.geteuid() != 0,
+-                     'non-root user required')
++@unittest.skipUnless(os.path.exists("/etc/shadow"), 'spwd tests require /etc/shadow')
+ class TestSpwdNonRoot(unittest.TestCase):
+ 
+     def test_getspnam_exception(self):
+--- Lib/test/test_regrtest.py
++++ Lib/test/test_regrtest.py
+@@ -700,6 +700,7 @@
+         output = self.run_tests('--fromfile', filename)
+         self.check_executed_tests(output, tests)
+ 
++    @unittest.skipIf(True, 'Keyboard interrupts do not work in the Guix build environment.')
+     def test_interrupted(self):
+         code = TEST_INTERRUPTED
+         test = self.create_test('sigint', code=code)
+@@ -717,6 +718,7 @@
+                  % (self.TESTNAME_REGEX, len(tests)))
+         self.check_line(output, regex)
+ 
++    @unittest.skipIf(True, 'Keyboard interrupts do not work in the Guix build environment.')
+     def test_slow_interrupted(self):
+         # Issue #25373: test --slowest with an interrupted test
+         code = TEST_INTERRUPTED
+--- Lib/test/test_generators.py
++++ Lib/test/test_generators.py
+@@ -29,6 +29,7 @@
+         else:
+             return "FAILED"
+ 
++    @unittest.skipIf(True, 'Keyboard interrupts do not work in the Guix build environment')
+     def test_raise_and_yield_from(self):
+         gen = self.generator1()
+         gen.send(None)
+--- Lib/test/test_normalization.py
++++ Lib/test/test_normalization.py
+@@ -2,6 +2,7 @@
+ import unittest
+ 
+ from http.client import HTTPException
++from urllib.error import URLError
+ import sys
+ from unicodedata import normalize, unidata_version
+ 
+@@ -43,6 +44,8 @@
+         except PermissionError:
+             self.skipTest(f"Permission error when downloading {TESTDATAURL} "
+                           f"into the test data directory")
++        except URLError:
++            self.skipTest("DNS lookups are not enabled.")
+         except (OSError, HTTPException):
+             self.fail(f"Could not retrieve {TESTDATAURL}")
+ 
diff --git a/gnu/packages/patches/python-3.5-fix-tests.patch b/gnu/packages/patches/python-3.5-fix-tests.patch
deleted file mode 100644
index 9778b88dbd..0000000000
--- a/gnu/packages/patches/python-3.5-fix-tests.patch
+++ /dev/null
@@ -1,69 +0,0 @@
-Additional test fixes which affect Python 3.5 (and presumably later) but not
-prior revisions of Python.
-
---- Lib/test/test_pathlib.py     2014-03-01 03:02:36.088311000 +0100
-+++ Lib/test/test_pathlib.py     2014-03-01 04:56:37.768311000 +0100
-@@ -1986,8 +1986,9 @@
-         expect = set() if not support.fs_is_case_insensitive(BASE) else given
-         self.assertEqual(given, expect)
-         self.assertEqual(set(p.rglob("FILEd*")), set())
- 
-+    @unittest.skipIf(True, "Guix builder home is '/' which causes trouble for these tests")
-     def test_expanduser(self):
-         P = self.cls
-         support.import_module('pwd')
-         import pwd
---- Lib/test/test_tarfile.py        2016-02-24 19:22:52.597208055 +0000
-+++ Lib/test/test_tarfile.py     2016-02-24 20:50:48.941950135 +0000
-@@ -2305,11 +2305,14 @@
-     try:
-         import pwd, grp
-     except ImportError:
-         return False
--    if pwd.getpwuid(0)[0] != 'root':
--        return False
--    if grp.getgrgid(0)[0] != 'root':
-+    try:
-+        if pwd.getpwuid(0)[0] != 'root':
-+            return False
-+        if grp.getgrgid(0)[0] != 'root':
-+            return False
-+    except KeyError:
-         return False
-     return True
-
-
---- Lib/test/test_asyncio/test_base_events.py
-+++ Lib/test/test_asyncio/test_base_events.py
-@@ -1216,6 +1216,8 @@
-         self._test_create_connection_ip_addr(m_socket, False)
-
-     @patch_socket
-+    @unittest.skipUnless(support.is_resource_enabled('network'),
-+                         'network is not enabled')
-     def test_create_connection_service_name(self, m_socket):
-         m_socket.getaddrinfo = socket.getaddrinfo
-         sock = m_socket.socket.return_value
-
---- Lib/test/test_pdb.py.org    2017-03-12 03:09:01.991856701 +0100
-+++ Lib/test/test_pdb.py        2017-03-12 03:26:17.742572869 +0100
-
-For some reason, KeyboardInterrupts do not work in the build
-environment (lack of controlling TTY?). Just change the expected
-outcome. Unfortunately, this will make it fail for users running
-`python -m test test_pdb test_pdb` interactively.
-
-@@ -928,11 +928,11 @@
-     > <doctest test.test_pdb.test_pdb_issue_20766[0]>(6)test_function()
-     -> print('pdb %d: %s' % (i, sess._previous_sigint_handler))
-     (Pdb) continue
--    pdb 1: <built-in function default_int_handler>
-+    pdb 1: Handlers.SIG_IGN
-     > <doctest test.test_pdb.test_pdb_issue_20766[0]>(5)test_function()
-     -> sess.set_trace(sys._getframe())
-     (Pdb) continue
--    pdb 2: <built-in function default_int_handler>
-+    pdb 2: Handlers.SIG_IGN
-     """
-
- class PdbTestCase(unittest.TestCase):
diff --git a/gnu/packages/patches/python-3.5-getentropy-on-old-kernels.patch b/gnu/packages/patches/python-3.5-getentropy-on-old-kernels.patch
deleted file mode 100644
index 8a12b5b448..0000000000
--- a/gnu/packages/patches/python-3.5-getentropy-on-old-kernels.patch
+++ /dev/null
@@ -1,720 +0,0 @@
-This patch resolves a compatibility issue when compiled against glibc 2.25
-and run runder kernels < 3.17:
-
-https://bugzilla.redhat.com/show_bug.cgi?id=1410175
-
-Upstream bug URL: https://bugs.python.org/issue29157
-
-Patch copied from upstream source repository:
-
-https://hg.python.org/cpython/rev/8125d9a8152b
-
-# HG changeset patch
-# User Victor Stinner <victor.stinner@gmail.com>
-# Date 1483957133 -3600
-# Node ID 8125d9a8152b79e712cb09c7094b9129b9bcea86
-# Parent  337461574c90281630751b6095c4e1baf380cf7d
-Issue #29157: Prefer getrandom() over getentropy()
-
-Copy and then adapt Python/random.c from default branch. Difference between 3.5
-and default branches:
-
-* Python 3.5 only uses getrandom() in non-blocking mode: flags=GRND_NONBLOCK
-* If getrandom() fails with EAGAIN: py_getrandom() immediately fails and
-  remembers that getrandom() doesn't work.
-* Python 3.5 has no _PyOS_URandomNonblock() function: _PyOS_URandom()
-  works in non-blocking mode on Python 3.5
-
-diff --git a/Python/random.c b/Python/random.c
---- Python/random.c
-+++ Python/random.c
-@@ -1,6 +1,9 @@
- #include "Python.h"
- #ifdef MS_WINDOWS
- #  include <windows.h>
-+/* All sample MSDN wincrypt programs include the header below. It is at least
-+ * required with Min GW. */
-+#  include <wincrypt.h>
- #else
- #  include <fcntl.h>
- #  ifdef HAVE_SYS_STAT_H
-@@ -37,10 +40,9 @@ win32_urandom_init(int raise)
-     return 0;
- 
- error:
--    if (raise)
-+    if (raise) {
-         PyErr_SetFromWindowsErr(0);
--    else
--        Py_FatalError("Failed to initialize Windows random API (CryptoGen)");
-+    }
-     return -1;
- }
- 
-@@ -53,8 +55,9 @@ win32_urandom(unsigned char *buffer, Py_
- 
-     if (hCryptProv == 0)
-     {
--        if (win32_urandom_init(raise) == -1)
-+        if (win32_urandom_init(raise) == -1) {
-             return -1;
-+        }
-     }
- 
-     while (size > 0)
-@@ -63,11 +66,9 @@ win32_urandom(unsigned char *buffer, Py_
-         if (!CryptGenRandom(hCryptProv, (DWORD)chunk, buffer))
-         {
-             /* CryptGenRandom() failed */
--            if (raise)
-+            if (raise) {
-                 PyErr_SetFromWindowsErr(0);
--            else
--                Py_FatalError("Failed to initialized the randomized hash "
--                        "secret using CryptoGen)");
-+            }
-             return -1;
-         }
-         buffer += chunk;
-@@ -76,58 +77,23 @@ win32_urandom(unsigned char *buffer, Py_
-     return 0;
- }
- 
--/* Issue #25003: Don't use getentropy() on Solaris (available since
-- * Solaris 11.3), it is blocking whereas os.urandom() should not block. */
--#elif defined(HAVE_GETENTROPY) && !defined(sun)
--#define PY_GETENTROPY 1
--
--/* Fill buffer with size pseudo-random bytes generated by getentropy().
--   Return 0 on success, or raise an exception and return -1 on error.
--
--   If fatal is nonzero, call Py_FatalError() instead of raising an exception
--   on error. */
--static int
--py_getentropy(unsigned char *buffer, Py_ssize_t size, int fatal)
--{
--    while (size > 0) {
--        Py_ssize_t len = Py_MIN(size, 256);
--        int res;
--
--        if (!fatal) {
--            Py_BEGIN_ALLOW_THREADS
--            res = getentropy(buffer, len);
--            Py_END_ALLOW_THREADS
--
--            if (res < 0) {
--                PyErr_SetFromErrno(PyExc_OSError);
--                return -1;
--            }
--        }
--        else {
--            res = getentropy(buffer, len);
--            if (res < 0)
--                Py_FatalError("getentropy() failed");
--        }
--
--        buffer += len;
--        size -= len;
--    }
--    return 0;
--}
--
--#else
-+#else /* !MS_WINDOWS */
- 
- #if defined(HAVE_GETRANDOM) || defined(HAVE_GETRANDOM_SYSCALL)
- #define PY_GETRANDOM 1
- 
--/* Call getrandom()
-+/* Call getrandom() to get random bytes:
-+
-    - Return 1 on success
--   - Return 0 if getrandom() syscall is not available (failed with ENOSYS or
--     EPERM) or if getrandom(GRND_NONBLOCK) failed with EAGAIN (system urandom
--     not initialized yet) and raise=0.
-+   - Return 0 if getrandom() is not available (failed with ENOSYS or EPERM),
-+     or if getrandom(GRND_NONBLOCK) failed with EAGAIN (system urandom not
-+     initialized yet).
-    - Raise an exception (if raise is non-zero) and return -1 on error:
--     getrandom() failed with EINTR and the Python signal handler raised an
--     exception, or getrandom() failed with a different error. */
-+     if getrandom() failed with EINTR, raise is non-zero and the Python signal
-+     handler raised an exception, or if getrandom() failed with a different
-+     error.
-+
-+   getrandom() is retried if it failed with EINTR: interrupted by a signal. */
- static int
- py_getrandom(void *buffer, Py_ssize_t size, int raise)
- {
-@@ -142,16 +108,19 @@ py_getrandom(void *buffer, Py_ssize_t si
-      * see https://bugs.python.org/issue26839. To avoid this, use the
-      * GRND_NONBLOCK flag. */
-     const int flags = GRND_NONBLOCK;
-+    char *dest;
-     long n;
- 
-     if (!getrandom_works) {
-         return 0;
-     }
- 
-+    dest = buffer;
-     while (0 < size) {
- #ifdef sun
-         /* Issue #26735: On Solaris, getrandom() is limited to returning up
--           to 1024 bytes */
-+           to 1024 bytes. Call it multiple times if more bytes are
-+           requested. */
-         n = Py_MIN(size, 1024);
- #else
-         n = Py_MIN(size, LONG_MAX);
-@@ -161,34 +130,35 @@ py_getrandom(void *buffer, Py_ssize_t si
- #ifdef HAVE_GETRANDOM
-         if (raise) {
-             Py_BEGIN_ALLOW_THREADS
--            n = getrandom(buffer, n, flags);
-+            n = getrandom(dest, n, flags);
-             Py_END_ALLOW_THREADS
-         }
-         else {
--            n = getrandom(buffer, n, flags);
-+            n = getrandom(dest, n, flags);
-         }
- #else
-         /* On Linux, use the syscall() function because the GNU libc doesn't
--         * expose the Linux getrandom() syscall yet. See:
--         * https://sourceware.org/bugzilla/show_bug.cgi?id=17252 */
-+           expose the Linux getrandom() syscall yet. See:
-+           https://sourceware.org/bugzilla/show_bug.cgi?id=17252 */
-         if (raise) {
-             Py_BEGIN_ALLOW_THREADS
--            n = syscall(SYS_getrandom, buffer, n, flags);
-+            n = syscall(SYS_getrandom, dest, n, flags);
-             Py_END_ALLOW_THREADS
-         }
-         else {
--            n = syscall(SYS_getrandom, buffer, n, flags);
-+            n = syscall(SYS_getrandom, dest, n, flags);
-         }
- #endif
- 
-         if (n < 0) {
--            /* ENOSYS: getrandom() syscall not supported by the kernel (but
--             * maybe supported by the host which built Python). EPERM:
--             * getrandom() syscall blocked by SECCOMP or something else. */
-+            /* ENOSYS: the syscall is not supported by the kernel.
-+               EPERM: the syscall is blocked by a security policy (ex: SECCOMP)
-+               or something else. */
-             if (errno == ENOSYS || errno == EPERM) {
-                 getrandom_works = 0;
-                 return 0;
-             }
-+
-             if (errno == EAGAIN) {
-                 /* getrandom(GRND_NONBLOCK) fails with EAGAIN if the system
-                    urandom is not initialiazed yet. In this case, fall back on
-@@ -202,32 +172,101 @@ py_getrandom(void *buffer, Py_ssize_t si
-             }
- 
-             if (errno == EINTR) {
--                if (PyErr_CheckSignals()) {
--                    if (!raise) {
--                        Py_FatalError("getrandom() interrupted by a signal");
-+                if (raise) {
-+                    if (PyErr_CheckSignals()) {
-+                        return -1;
-                     }
--                    return -1;
-                 }
- 
--                /* retry getrandom() */
-+                /* retry getrandom() if it was interrupted by a signal */
-                 continue;
-             }
- 
-             if (raise) {
-                 PyErr_SetFromErrno(PyExc_OSError);
-             }
--            else {
--                Py_FatalError("getrandom() failed");
-+            return -1;
-+        }
-+
-+        dest += n;
-+        size -= n;
-+    }
-+    return 1;
-+}
-+
-+#elif defined(HAVE_GETENTROPY)
-+#define PY_GETENTROPY 1
-+
-+/* Fill buffer with size pseudo-random bytes generated by getentropy():
-+
-+   - Return 1 on success
-+   - Return 0 if getentropy() syscall is not available (failed with ENOSYS or
-+     EPERM).
-+   - Raise an exception (if raise is non-zero) and return -1 on error:
-+     if getentropy() failed with EINTR, raise is non-zero and the Python signal
-+     handler raised an exception, or if getentropy() failed with a different
-+     error.
-+
-+   getentropy() is retried if it failed with EINTR: interrupted by a signal. */
-+static int
-+py_getentropy(char *buffer, Py_ssize_t size, int raise)
-+{
-+    /* Is getentropy() supported by the running kernel? Set to 0 if
-+       getentropy() failed with ENOSYS or EPERM. */
-+    static int getentropy_works = 1;
-+
-+    if (!getentropy_works) {
-+        return 0;
-+    }
-+
-+    while (size > 0) {
-+        /* getentropy() is limited to returning up to 256 bytes. Call it
-+           multiple times if more bytes are requested. */
-+        Py_ssize_t len = Py_MIN(size, 256);
-+        int res;
-+
-+        if (raise) {
-+            Py_BEGIN_ALLOW_THREADS
-+            res = getentropy(buffer, len);
-+            Py_END_ALLOW_THREADS
-+        }
-+        else {
-+            res = getentropy(buffer, len);
-+        }
-+
-+        if (res < 0) {
-+            /* ENOSYS: the syscall is not supported by the running kernel.
-+               EPERM: the syscall is blocked by a security policy (ex: SECCOMP)
-+               or something else. */
-+            if (errno == ENOSYS || errno == EPERM) {
-+                getentropy_works = 0;
-+                return 0;
-+            }
-+
-+            if (errno == EINTR) {
-+                if (raise) {
-+                    if (PyErr_CheckSignals()) {
-+                        return -1;
-+                    }
-+                }
-+
-+                /* retry getentropy() if it was interrupted by a signal */
-+                continue;
-+            }
-+
-+            if (raise) {
-+                PyErr_SetFromErrno(PyExc_OSError);
-             }
-             return -1;
-         }
- 
--        buffer += n;
--        size -= n;
-+        buffer += len;
-+        size -= len;
-     }
-     return 1;
- }
--#endif
-+#endif /* defined(HAVE_GETENTROPY) && !defined(sun) */
-+
- 
- static struct {
-     int fd;
-@@ -235,136 +274,123 @@ static struct {
-     ino_t st_ino;
- } urandom_cache = { -1 };
- 
-+/* Read random bytes from the /dev/urandom device:
- 
--/* Read 'size' random bytes from py_getrandom(). Fall back on reading from
--   /dev/urandom if getrandom() is not available.
-+   - Return 0 on success
-+   - Raise an exception (if raise is non-zero) and return -1 on error
- 
--   Call Py_FatalError() on error. */
--static void
--dev_urandom_noraise(unsigned char *buffer, Py_ssize_t size)
-+   Possible causes of errors:
-+
-+   - open() failed with ENOENT, ENXIO, ENODEV, EACCES: the /dev/urandom device
-+     was not found. For example, it was removed manually or not exposed in a
-+     chroot or container.
-+   - open() failed with a different error
-+   - fstat() failed
-+   - read() failed or returned 0
-+
-+   read() is retried if it failed with EINTR: interrupted by a signal.
-+
-+   The file descriptor of the device is kept open between calls to avoid using
-+   many file descriptors when run in parallel from multiple threads:
-+   see the issue #18756.
-+
-+   st_dev and st_ino fields of the file descriptor (from fstat()) are cached to
-+   check if the file descriptor was replaced by a different file (which is
-+   likely a bug in the application): see the issue #21207.
-+
-+   If the file descriptor was closed or replaced, open a new file descriptor
-+   but don't close the old file descriptor: it probably points to something
-+   important for some third-party code. */
-+static int
-+dev_urandom(char *buffer, Py_ssize_t size, int raise)
- {
-     int fd;
-     Py_ssize_t n;
- 
--    assert (0 < size);
-+    if (raise) {
-+        struct _Py_stat_struct st;
- 
--#ifdef PY_GETRANDOM
--    if (py_getrandom(buffer, size, 0) == 1) {
--        return;
-+        if (urandom_cache.fd >= 0) {
-+            /* Does the fd point to the same thing as before? (issue #21207) */
-+            if (_Py_fstat_noraise(urandom_cache.fd, &st)
-+                || st.st_dev != urandom_cache.st_dev
-+                || st.st_ino != urandom_cache.st_ino) {
-+                /* Something changed: forget the cached fd (but don't close it,
-+                   since it probably points to something important for some
-+                   third-party code). */
-+                urandom_cache.fd = -1;
-+            }
-+        }
-+        if (urandom_cache.fd >= 0)
-+            fd = urandom_cache.fd;
-+        else {
-+            fd = _Py_open("/dev/urandom", O_RDONLY);
-+            if (fd < 0) {
-+                if (errno == ENOENT || errno == ENXIO ||
-+                    errno == ENODEV || errno == EACCES) {
-+                    PyErr_SetString(PyExc_NotImplementedError,
-+                                    "/dev/urandom (or equivalent) not found");
-+                }
-+                /* otherwise, keep the OSError exception raised by _Py_open() */
-+                return -1;
-+            }
-+            if (urandom_cache.fd >= 0) {
-+                /* urandom_fd was initialized by another thread while we were
-+                   not holding the GIL, keep it. */
-+                close(fd);
-+                fd = urandom_cache.fd;
-+            }
-+            else {
-+                if (_Py_fstat(fd, &st)) {
-+                    close(fd);
-+                    return -1;
-+                }
-+                else {
-+                    urandom_cache.fd = fd;
-+                    urandom_cache.st_dev = st.st_dev;
-+                    urandom_cache.st_ino = st.st_ino;
-+                }
-+            }
-+        }
-+
-+        do {
-+            n = _Py_read(fd, buffer, (size_t)size);
-+            if (n == -1)
-+                return -1;
-+            if (n == 0) {
-+                PyErr_Format(PyExc_RuntimeError,
-+                        "Failed to read %zi bytes from /dev/urandom",
-+                        size);
-+                return -1;
-+            }
-+
-+            buffer += n;
-+            size -= n;
-+        } while (0 < size);
-     }
--    /* getrandom() failed with ENOSYS or EPERM,
--       fall back on reading /dev/urandom */
--#endif
--
--    fd = _Py_open_noraise("/dev/urandom", O_RDONLY);
--    if (fd < 0) {
--        Py_FatalError("Failed to open /dev/urandom");
--    }
--
--    while (0 < size)
--    {
--        do {
--            n = read(fd, buffer, (size_t)size);
--        } while (n < 0 && errno == EINTR);
--
--        if (n <= 0) {
--            /* read() failed or returned 0 bytes */
--            Py_FatalError("Failed to read bytes from /dev/urandom");
--            break;
--        }
--        buffer += n;
--        size -= n;
--    }
--    close(fd);
--}
--
--/* Read 'size' random bytes from py_getrandom(). Fall back on reading from
--   /dev/urandom if getrandom() is not available.
--
--   Return 0 on success. Raise an exception and return -1 on error. */
--static int
--dev_urandom_python(char *buffer, Py_ssize_t size)
--{
--    int fd;
--    Py_ssize_t n;
--    struct _Py_stat_struct st;
--#ifdef PY_GETRANDOM
--    int res;
--#endif
--
--    if (size <= 0)
--        return 0;
--
--#ifdef PY_GETRANDOM
--    res = py_getrandom(buffer, size, 1);
--    if (res < 0) {
--        return -1;
--    }
--    if (res == 1) {
--        return 0;
--    }
--    /* getrandom() failed with ENOSYS or EPERM,
--       fall back on reading /dev/urandom */
--#endif
--
--    if (urandom_cache.fd >= 0) {
--        /* Does the fd point to the same thing as before? (issue #21207) */
--        if (_Py_fstat_noraise(urandom_cache.fd, &st)
--            || st.st_dev != urandom_cache.st_dev
--            || st.st_ino != urandom_cache.st_ino) {
--            /* Something changed: forget the cached fd (but don't close it,
--               since it probably points to something important for some
--               third-party code). */
--            urandom_cache.fd = -1;
--        }
--    }
--    if (urandom_cache.fd >= 0)
--        fd = urandom_cache.fd;
-     else {
--        fd = _Py_open("/dev/urandom", O_RDONLY);
-+        fd = _Py_open_noraise("/dev/urandom", O_RDONLY);
-         if (fd < 0) {
--            if (errno == ENOENT || errno == ENXIO ||
--                errno == ENODEV || errno == EACCES)
--                PyErr_SetString(PyExc_NotImplementedError,
--                                "/dev/urandom (or equivalent) not found");
--            /* otherwise, keep the OSError exception raised by _Py_open() */
-             return -1;
-         }
--        if (urandom_cache.fd >= 0) {
--            /* urandom_fd was initialized by another thread while we were
--               not holding the GIL, keep it. */
--            close(fd);
--            fd = urandom_cache.fd;
--        }
--        else {
--            if (_Py_fstat(fd, &st)) {
-+
-+        while (0 < size)
-+        {
-+            do {
-+                n = read(fd, buffer, (size_t)size);
-+            } while (n < 0 && errno == EINTR);
-+
-+            if (n <= 0) {
-+                /* stop on error or if read(size) returned 0 */
-                 close(fd);
-                 return -1;
-             }
--            else {
--                urandom_cache.fd = fd;
--                urandom_cache.st_dev = st.st_dev;
--                urandom_cache.st_ino = st.st_ino;
--            }
-+
-+            buffer += n;
-+            size -= n;
-         }
-+        close(fd);
-     }
--
--    do {
--        n = _Py_read(fd, buffer, (size_t)size);
--        if (n == -1) {
--            return -1;
--        }
--        if (n == 0) {
--            PyErr_Format(PyExc_RuntimeError,
--                    "Failed to read %zi bytes from /dev/urandom",
--                    size);
--            return -1;
--        }
--
--        buffer += n;
--        size -= n;
--    } while (0 < size);
--
-     return 0;
- }
- 
-@@ -376,8 +402,8 @@ dev_urandom_close(void)
-         urandom_cache.fd = -1;
-     }
- }
-+#endif /* !MS_WINDOWS */
- 
--#endif
- 
- /* Fill buffer with pseudo-random bytes generated by a linear congruent
-    generator (LCG):
-@@ -400,29 +426,98 @@ lcg_urandom(unsigned int x0, unsigned ch
-     }
- }
- 
-+/* Read random bytes:
-+
-+   - Return 0 on success
-+   - Raise an exception (if raise is non-zero) and return -1 on error
-+
-+   Used sources of entropy ordered by preference, preferred source first:
-+
-+   - CryptGenRandom() on Windows
-+   - getrandom() function (ex: Linux and Solaris): call py_getrandom()
-+   - getentropy() function (ex: OpenBSD): call py_getentropy()
-+   - /dev/urandom device
-+
-+   Read from the /dev/urandom device if getrandom() or getentropy() function
-+   is not available or does not work.
-+
-+   Prefer getrandom() over getentropy() because getrandom() supports blocking
-+   and non-blocking mode and Python requires non-blocking RNG at startup to
-+   initialize its hash secret: see the PEP 524.
-+
-+   Prefer getrandom() and getentropy() over reading directly /dev/urandom
-+   because these functions don't need file descriptors and so avoid ENFILE or
-+   EMFILE errors (too many open files): see the issue #18756.
-+
-+   Only use RNG running in the kernel. They are more secure because it is
-+   harder to get the internal state of a RNG running in the kernel land than a
-+   RNG running in the user land. The kernel has a direct access to the hardware
-+   and has access to hardware RNG, they are used as entropy sources.
-+
-+   Note: the OpenSSL RAND_pseudo_bytes() function does not automatically reseed
-+   its RNG on fork(), two child processes (with the same pid) generate the same
-+   random numbers: see issue #18747. Kernel RNGs don't have this issue,
-+   they have access to good quality entropy sources.
-+
-+   If raise is zero:
-+
-+   - Don't raise an exception on error
-+   - Don't call the Python signal handler (don't call PyErr_CheckSignals()) if
-+     a function fails with EINTR: retry directly the interrupted function
-+   - Don't release the GIL to call functions.
-+*/
-+static int
-+pyurandom(void *buffer, Py_ssize_t size, int raise)
-+{
-+#if defined(PY_GETRANDOM) || defined(PY_GETENTROPY)
-+    int res;
-+#endif
-+
-+    if (size < 0) {
-+        if (raise) {
-+            PyErr_Format(PyExc_ValueError,
-+                         "negative argument not allowed");
-+        }
-+        return -1;
-+    }
-+
-+    if (size == 0) {
-+        return 0;
-+    }
-+
-+#ifdef MS_WINDOWS
-+    return win32_urandom((unsigned char *)buffer, size, raise);
-+#else
-+
-+#if defined(PY_GETRANDOM) || defined(PY_GETENTROPY)
-+#ifdef PY_GETRANDOM
-+    res = py_getrandom(buffer, size, raise);
-+#else
-+    res = py_getentropy(buffer, size, raise);
-+#endif
-+    if (res < 0) {
-+        return -1;
-+    }
-+    if (res == 1) {
-+        return 0;
-+    }
-+    /* getrandom() or getentropy() function is not available: failed with
-+       ENOSYS, EPERM or EAGAIN. Fall back on reading from /dev/urandom. */
-+#endif
-+
-+    return dev_urandom(buffer, size, raise);
-+#endif
-+}
-+
- /* Fill buffer with size pseudo-random bytes from the operating system random
-    number generator (RNG). It is suitable for most cryptographic purposes
-    except long living private keys for asymmetric encryption.
- 
--   Return 0 on success, raise an exception and return -1 on error. */
-+   Return 0 on success. Raise an exception and return -1 on error. */
- int
- _PyOS_URandom(void *buffer, Py_ssize_t size)
- {
--    if (size < 0) {
--        PyErr_Format(PyExc_ValueError,
--                     "negative argument not allowed");
--        return -1;
--    }
--    if (size == 0)
--        return 0;
--
--#ifdef MS_WINDOWS
--    return win32_urandom((unsigned char *)buffer, size, 1);
--#elif defined(PY_GETENTROPY)
--    return py_getentropy(buffer, size, 0);
--#else
--    return dev_urandom_python((char*)buffer, size);
--#endif
-+    return pyurandom(buffer, size, 1);
- }
- 
- void
-@@ -463,13 +558,14 @@ void
-         }
-     }
-     else {
--#ifdef MS_WINDOWS
--        (void)win32_urandom(secret, secret_size, 0);
--#elif defined(PY_GETENTROPY)
--        (void)py_getentropy(secret, secret_size, 1);
--#else
--        dev_urandom_noraise(secret, secret_size);
--#endif
-+        int res;
-+
-+        /* _PyRandom_Init() is called very early in the Python initialization
-+           and so exceptions cannot be used (use raise=0). */
-+        res = pyurandom(secret, secret_size, 0);
-+        if (res < 0) {
-+            Py_FatalError("failed to get random numbers to initialize Python");
-+        }
-     }
- }
- 
-@@ -481,8 +577,6 @@ void
-         CryptReleaseContext(hCryptProv, 0);
-         hCryptProv = 0;
-     }
--#elif defined(PY_GETENTROPY)
--    /* nothing to clean */
- #else
-     dev_urandom_close();
- #endif
-
diff --git a/gnu/packages/patches/python-unittest2-python3-compat.patch b/gnu/packages/patches/python-unittest2-python3-compat.patch
new file mode 100644
index 0000000000..fe0afe559a
--- /dev/null
+++ b/gnu/packages/patches/python-unittest2-python3-compat.patch
@@ -0,0 +1,34 @@
+Skip tests that fail with newer versions of Python.
+
+Patch copied from Gentoo:
+
+https://gitweb.gentoo.org/repo/gentoo.git/tree/dev-python/unittest2/files/unittest2-1.1.0-python3.5-test.patch
+
+diff --git a/unittest2/test/test_loader.py b/unittest2/test/test_loader.py
+index 683f662..347eea5 100644
+--- a/unittest2/test/test_loader.py
++++ b/unittest2/test/test_loader.py
+@@ -509,6 +509,7 @@ class Test_TestLoader(unittest2.TestCase):
+     #
+     # What happens when an impossible name is given, relative to the provided
+     # `module`?
++    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
+     def test_loadTestsFromName__relative_malformed_name(self):
+         loader = unittest.TestLoader()
+ 
+@@ -811,6 +812,7 @@ class Test_TestLoader(unittest2.TestCase):
+     # TestCase or TestSuite instance."
+     #
+     # What happens when presented with an impossible module name?
++    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
+     def test_loadTestsFromNames__malformed_name(self):
+         loader = unittest2.TestLoader()
+ 
+@@ -918,6 +920,7 @@ class Test_TestLoader(unittest2.TestCase):
+     # "The method optionally resolves name relative to the given module"
+     #
+     # What happens when presented with an impossible attribute name?
++    @unittest.skipIf(sys.version_info[:2] >= (3, 5), "python 3.5 has problems here")
+     def test_loadTestsFromNames__relative_malformed_name(self):
+         loader = unittest.TestLoader()
+ 
diff --git a/gnu/packages/patches/python2-unittest2-remove-argparse.patch b/gnu/packages/patches/python-unittest2-remove-argparse.patch
index c96738757e..c96738757e 100644
--- a/gnu/packages/patches/python2-unittest2-remove-argparse.patch
+++ b/gnu/packages/patches/python-unittest2-remove-argparse.patch
diff --git a/gnu/packages/python.scm b/gnu/packages/python.scm
index de9b321fb7..119dde7d99 100644
--- a/gnu/packages/python.scm
+++ b/gnu/packages/python.scm
@@ -132,7 +132,7 @@
 (define-public python-2.7
   (package
     (name "python")
-    (version "2.7.13")
+    (version "2.7.14")
     (source
      (origin
       (method url-fetch)
@@ -140,12 +140,12 @@
                           version "/Python-" version ".tar.xz"))
       (sha256
        (base32
-        "0cgpk3zk0fgpji59pb4zy9nzljr70qzgv1vpz5hq5xw2d2c47m9m"))
+        "0rka541ys16jwzcnnvjp2v12m4cwgd2jp6wj4kj511p715pb5zvi"))
       (patches (search-patches "python-2.7-search-paths.patch"
                                "python-2-deterministic-build-info.patch"
                                "python-2.7-site-prefixes.patch"
                                "python-2.7-source-date-epoch.patch"
-                               "python-2.7-getentropy-on-old-kernels.patch"))
+                               "python-2.7-adjust-tests.patch"))
       (modules '((guix build utils)))
       ;; suboptimal to delete failing tests here, but if we delete them in the
       ;; arguments then we need to make sure to strip out that phase when it
@@ -203,6 +203,7 @@
                                   '("Lib/subprocess.py"
                                     "Lib/popen2.py"
                                     "Lib/distutils/tests/test_spawn.py"
+                                    "Lib/test/support/__init__.py"
                                     "Lib/test/test_subprocess.py"))
                (("/bin/sh") (which "sh")))
 
@@ -328,28 +329,28 @@ data types.")
 ;; Current 2.x version.
 (define-public python-2 python-2.7)
 
-(define-public python-3.5
+(define-public python-3.6
   (package (inherit python-2)
-    (version "3.5.3")
+    (version "3.6.3")
     (source (origin
               (method url-fetch)
               (uri (string-append "https://www.python.org/ftp/python/"
                                   version "/Python-" version ".tar.xz"))
               (patches (search-patches
                         "python-fix-tests.patch"
-                        "python-3.5-fix-tests.patch"
-                        "python-3.5-getentropy-on-old-kernels.patch"
+                        "python-3-fix-tests.patch"
                         "python-3-deterministic-build-info.patch"
                         "python-3-search-paths.patch"))
               (patch-flags '("-p0"))
               (sha256
                (base32
-                "1c6v1n9nz4mlx9mw1125fxpmbrgniqdbbx9hnqx44maqazb2mzpf"))
+                "1nl1raaagr4car787a2hmjv2dw6gqny53xfd6wisbgx4r5kxk9yd"))
               (snippet
                '(begin
                   (for-each delete-file
-                            '("Lib/ctypes/test/test_win32.py" ; fails on aarch64
-                              "Lib/test/test_fcntl.py"))
+                            '("Lib/ctypes/test/test_structures.py" ; fails on aarch64
+                              "Lib/ctypes/test/test_win32.py" ; fails on aarch64
+                              "Lib/test/test_fcntl.py")) ; fails on aarch64
                   #t))))
     (arguments (substitute-keyword-arguments (package-arguments python-2)
                  ((#:tests? _) #t)))
@@ -361,7 +362,7 @@ data types.")
                                         "/site-packages"))))))))
 
 ;; Current 3.x version.
-(define-public python-3 python-3.5)
+(define-public python-3 python-3.6)
 
 ;; Current major version.
 (define-public python python-3)
@@ -933,45 +934,43 @@ API for locking files.")
 (define-public python-mock
   (package
     (name "python-mock")
-    (version "1.0.1")
+    (version "2.0.0")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "mock" version))
        (sha256
         (base32
-         "0kzlsbki6q0awf89rc287f3aj8x431lrajf160a70z0ikhnxsfdq"))))
+         "1flbpksir5sqrvq2z0dp8sl4bzbadg21sj4d42w3klpdfvgvcn5i"))))
+    (propagated-inputs
+     `(("python-pbr" ,python-pbr-minimal)
+       ("python-six" ,python-six)))
     (build-system python-build-system)
-    (arguments '(#:test-target "check"))
+    (native-inputs
+     `(("python-unittest2" ,python-unittest2)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (zero? (system* "unit2")))))))
     (home-page "https://github.com/testing-cabal/mock")
     (synopsis "Python mocking and patching library for testing")
     (description
      "Mock is a library for testing in Python.  It allows you to replace parts
 of your system under test with mock objects and make assertions about how they
 have been used.")
+    (properties `((python2-variant . ,(delay python2-mock))))
     (license license:expat)))
 
 (define-public python2-mock
-  (package-with-python2 python-mock))
-
-;;; Some packages (notably, certbot and python-acme) rely on this newer version
-;;; of python-mock. However, a large number of packages fail to build with
-;;; mock@2, so we add a new variable for now. Also, there may be a dependency
-;;; cycle between mock and six, so we avoid creating python2-mock@2 for now.
-(define-public python-mock-2
-  (package
-    (inherit python-mock)
-    (version "2.0.0")
-    (source
-      (origin
-        (method url-fetch)
-        (uri (pypi-uri "mock" version))
-        (sha256
-         (base32
-          "1flbpksir5sqrvq2z0dp8sl4bzbadg21sj4d42w3klpdfvgvcn5i"))))
-    (propagated-inputs
-     `(("python-pbr" ,python-pbr-minimal)
-       ,@(package-propagated-inputs python-mock)))))
+  (let ((base (package-with-python2
+               (strip-python2-variant python-mock))))
+    (package (inherit base)
+      (propagated-inputs
+       `(("python2-functools32" ,python2-functools32)
+         ("python2-funcsigs" ,python2-funcsigs)
+         ,@(package-propagated-inputs base))))))
 
 (define-public python-setuptools
   (package
@@ -1169,18 +1168,24 @@ password storage.")
 (define-public python-six
   (package
     (name "python-six")
-    (version "1.10.0")
+    (version "1.11.0")
     (source
      (origin
       (method url-fetch)
       (uri (pypi-uri "six" version))
       (sha256
        (base32
-        "0snmb8xffb3vsma0z67i0h0w2g2dy0p3gsgh9gi4i0kgc5l8spqh"))))
+        "1scqzwc51c875z23phj48gircqjgnn3af8zy2izjwmnlxrxsgs3h"))))
     (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (zero? (system* "py.test" "-v")))))))
     (native-inputs
      `(("python-py" ,python-py)
-       ("python-pytest" ,python-pytest)))
+       ("python-pytest" ,python-pytest-bootstrap)))
     (home-page "http://pypi.python.org/pypi/six/")
     (synopsis "Python 2 and 3 compatibility utilities")
     (description
@@ -1566,6 +1571,28 @@ bug tracker.")
     (home-page "http://www.liquidx.net/pybugz/")
     (license license:gpl2)))
 
+(define-public python2-enum
+  (package
+    (name "python2-enum")
+    (version "0.4.6")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "enum" version))
+              (sha256
+               (base32
+                "13lk3yrwj42vl30kw3c194f739nrfrdg64s6i0v2p636n4k8brsl"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2))
+    (home-page "http://pypi.python.org/pypi/enum/")
+    (synopsis "Robust enumerated type support in Python")
+    (description
+     "This provides a module for robust enumerations in Python.  It has
+been superseded by the Python standard library and is provided only for
+compatibility.")
+    ;; Choice of either license.
+    (license (list license:gpl3+ license:psfl))))
+
 (define-public python-enum34
   (package
     (name "python-enum34")
@@ -1816,20 +1843,51 @@ interfaces and processes.")
 (define-public python2-nose2
   (package-with-python2 python-nose2))
 
+(define-public python2-funcsigs
+  (package
+    (name "python2-funcsigs")
+    (version "1.0.2")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "funcsigs" version))
+              (sha256
+               (base32
+                "0l4g5818ffyfmfs1a924811azhjj8ax9xd1cffr1mzd3ycn0zfx7"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2))
+    (native-inputs
+     `(("python2-unittest2" ,python2-unittest2)))
+    (home-page "http://funcsigs.readthedocs.org")
+    (synopsis "Python function signatures from PEP362")
+    (description
+     "Backport of @code{funcsigs} which was introduced in Python 3.3.")
+    (license license:asl2.0)))
+
 (define-public python-unittest2
   (package
     (name "python-unittest2")
-    (version "0.5.1")
+    (version "1.1.0")
     (source
      (origin
        (method url-fetch)
-       (uri (string-append
-             "https://pypi.python.org/packages/source/u/unittest2py3k/unittest2py3k-"
-             version ".tar.gz"))
+       (uri (pypi-uri "unittest2" version))
+       (patches
+        (search-patches "python-unittest2-python3-compat.patch"
+                        "python-unittest2-remove-argparse.patch"))
        (sha256
         (base32
-         "00yl6lskygcrddx5zspkhr0ibgvpknl4678kkm6s626539grq93q"))))
+         "0y855kmx7a8rnf81d3lh5lyxai1908xjp0laf4glwa4c8472m212"))))
     (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (zero? (system* "python" "-m" "unittest2" "discover" "--verbose")))))))
+    (propagated-inputs
+     `(("python-six" ,python-six)
+       ("python-traceback2" ,python-traceback2)))
     (home-page "http://pypi.python.org/pypi/unittest2")
     (synopsis "Python unit testing library")
     (description
@@ -1838,26 +1896,7 @@ standard library.")
     (license license:psfl)))
 
 (define-public python2-unittest2
-  (package (inherit python-unittest2)
-    (name "python2-unittest2")
-    (version "1.1.0")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (string-append
-             "https://pypi.python.org/packages/source/u/unittest2/unittest2-"
-             version ".tar.gz"))
-       (sha256
-        (base32
-         "0y855kmx7a8rnf81d3lh5lyxai1908xjp0laf4glwa4c8472m212"))
-       (patches
-        (search-patches "python2-unittest2-remove-argparse.patch"))))
-    (propagated-inputs
-     `(("python2-six" ,python2-six)
-       ("python2-traceback2" ,python2-traceback2)))
-    (arguments
-     `(#:python ,python-2
-       #:tests? #f)))) ; no setup.py test command
+  (package-with-python2 python-unittest2))
 
 (define-public python-pafy
   (package
@@ -1886,14 +1925,14 @@ standard library.")
 (define-public python-py
   (package
     (name "python-py")
-    (version "1.4.32")
+    (version "1.4.34")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "py" version))
        (sha256
         (base32
-         "19s1pql9pq85h1qzsdwgyb8a3k1qgkvh33b02m8kfqhizz8rzf64"))))
+         "1qyd5z0hv8ymxy84v5vig3vps2fvhcf4bdlksb3r03h549fmhb8g"))))
     (build-system python-build-system)
     (arguments
      ;; FIXME: "ImportError: 'test' module incorrectly imported from
@@ -1914,30 +1953,39 @@ code introspection, and logging.")
 (define-public python-pytest
   (package
     (name "python-pytest")
-    (version "2.7.3")
+    (version "3.2.3")
     (source
      (origin
        (method url-fetch)
-       (uri (string-append
-             "https://pypi.python.org/packages/source/p/pytest/pytest-"
-             version ".tar.gz"))
+       (uri (pypi-uri "pytest" version))
        (sha256
         (base32
-         "1z4yi986f9n0p8qmzmn21m21m8j1x78hk3505f89baqm6pdw7afm"))
-       (modules '((guix build utils)))
-       (snippet
-        ;; One of the tests involves the /usr directory, so it fails.
-        '(substitute* "testing/test_argcomplete.py"
-           (("def test_remove_dir_prefix\\(self\\):")
-            "@pytest.mark.xfail\n    def test_remove_dir_prefix(self):")))))
+         "0g6w86ks73fnrnsyib9ii2rbyx830vn7aglsjqz9v1n2xwbndyi7"))))
     (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'disable-invalid-tests
+           (lambda _
+             ;; Some tests involves the /usr directory, and fails.
+             (substitute* "testing/test_argcomplete.py"
+               (("def test_remove_dir_prefix\\(self\\):")
+                "@pytest.mark.xfail\n    def test_remove_dir_prefix(self):"))
+             (substitute* "testing/test_argcomplete.py"
+               (("def test_remove_dir_prefix" line)
+                (string-append "@pytest.mark.skip"
+                               "(reason=\"Assumes that /usr exists.\")\n    "
+                               line)))
+             #t)))))
     (propagated-inputs
      `(("python-py" ,python-py)))
     (native-inputs
      `(;; Tests need the "regular" bash since 'bash-final' lacks `compgen`.
        ("bash" ,bash)
+       ("python-hypothesis" ,python-hypothesis)
        ("python-nose" ,python-nose)
-       ("python-mock" ,python-mock)))
+       ("python-mock" ,python-mock)
+       ("python-setuptools-scm" ,python-setuptools-scm)))
     (home-page "http://pytest.org")
     (synopsis "Python testing library")
     (description
@@ -1949,41 +1997,15 @@ and many external plugins.")
 (define-public python2-pytest
   (package-with-python2 python-pytest))
 
-;; Some packages require a newer pytest.
-(define-public python-pytest-3.0
+(define-public python-pytest-bootstrap
   (package
     (inherit python-pytest)
-    (name "python-pytest")
-    (version "3.0.7")
-    (source (origin
-              (method url-fetch)
-              (uri (pypi-uri "pytest" version))
-              (sha256
-               (base32
-                "1asc4b2nd2a4f0g3r12y97rslq5wliji7b73wwkvdrm5s7mrc1mp"))))
-    (arguments
-     `(#:phases
-       (modify-phases %standard-phases
-         (add-before 'check 'disable-invalid-test
-           (lambda _
-             (substitute* "testing/test_argcomplete.py"
-               (("def test_remove_dir_prefix" line)
-                (string-append "@pytest.mark.skip"
-                               "(reason=\"Assumes that /usr exists.\")\n    "
-                               line)))
-             #t)))))
-    (native-inputs
-     `(("python-hypothesis" ,python-hypothesis)
-       ,@(package-native-inputs python-pytest)))
-    (properties `((python2-variant . ,(delay python2-pytest-3.0))))))
+    (name "python-pytest-bootstrap")
+    (native-inputs `(("python-setuptools-scm" ,python-setuptools-scm)))
+    (arguments `(#:tests? #f))))
 
-(define-public python2-pytest-3.0
-  (let ((base (package-with-python2
-                (strip-python2-variant python-pytest-3.0))))
-    (package (inherit base)
-      (native-inputs
-        `(("python2-enum34" ,python2-enum34)
-          ,@(package-native-inputs base))))))
+(define-public python2-pytest-bootstrap
+  (package-with-python2 python-pytest-bootstrap))
 
 (define-public python-pytest-cov
   (package
@@ -2045,7 +2067,7 @@ supports coverage of subprocesses.")
                (string-append "version = \"" ,version "\"")))
             #t)))))
     (native-inputs
-     `(("python-pytest" ,python-pytest)
+     `(("python-pytest" ,python-pytest-bootstrap)
        ("python-setuptools-scm" ,python-setuptools-scm)))
     (home-page "https://github.com/pytest-dev/pytest-runner")
     (synopsis "Invoke py.test as a distutils command")
@@ -2433,14 +2455,14 @@ have failed since the last commit or what tests are currently failing.")
 (define-public python-coverage
   (package
     (name "python-coverage")
-    (version "4.1")
+    (version "4.4.1")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "coverage" version))
        (sha256
         (base32
-         "01rbr4br4lsk0lwn8fb96zwd2xr4f0mg1w7iq3j11i8f5ig2nqs1"))))
+         "097l4s3ssxm1vncsn0nw3a1pbzah28773q36c1ab9wz01r04973s"))))
     (build-system python-build-system)
     (arguments
      ;; FIXME: 95 tests failed, 539 passed, 6 skipped, 2 errors.
@@ -2882,7 +2904,7 @@ somewhat intelligible.")
            #t))))
     (build-system python-build-system)
     (native-inputs
-     `(("python-pytest" ,python-pytest-3.0)
+     `(("python-pytest" ,python-pytest)
        ("python-pytest-cov" ,python-pytest-cov)
        ("python-pytest-runner" ,python-pytest-runner)))
     (home-page "https://github.com/progrium/pyjwt")
@@ -3076,18 +3098,6 @@ for Python.")
         (base32
          "1zzrkywhziqffrzks14kzixz7nd4yh2vc0fb04a68vfd2ai03anx"))))
     (build-system python-build-system)
-    (arguments
-     `(#:phases
-       (modify-phases %standard-phases
-         ;; These files cannot be built with Python < 3.6.  See
-         ;; https://github.com/pallets/jinja/issues/655
-         ;; FIXME: Remove this when the "python" package is upgraded.
-         (add-after 'unpack 'delete-incompatible-files
-           (lambda _
-             (for-each delete-file
-                       '("jinja2/asyncsupport.py"
-                         "jinja2/asyncfilters.py"))
-             #t)))))
     (propagated-inputs
      `(("python-markupsafe" ,python-markupsafe)))
     (home-page "http://jinja.pocoo.org/")
@@ -3338,7 +3348,7 @@ sources.")
      `(("python-sphinxcontrib-websupport" ,python-sphinxcontrib-websupport)
        ,@(package-propagated-inputs python-sphinx)))
     (native-inputs
-     `(("python-pytest" ,python-pytest-3.0)
+     `(("python-pytest" ,python-pytest)
        ("imagemagick" ,imagemagick) ; for "convert"
        ,@(package-native-inputs python-sphinx)))
     (properties '())))
@@ -3356,7 +3366,7 @@ sources.")
         (base32
          "0kw1axswbvaavr8ggyf4qr6hnisnrzlbkkcdada69vk1x9xjassg"))))
     (native-inputs
-     `(("python-pytest" ,python-pytest-3.0)
+     `(("python-pytest" ,python-pytest)
        ,@(package-native-inputs python-sphinx)))))
 
 (define-public python2-sphinx
@@ -5307,7 +5317,7 @@ Python language binding specification.")
     (arguments '(#:tests? #f)) ; Test file 'grako.ebnf' is missing from archive.
     (native-inputs
      `(("unzip" ,unzip)
-       ("python-pytest" ,python-pytest-3.0)
+       ("python-pytest" ,python-pytest)
        ("python-pytest-runner" ,python-pytest-runner)))
     (home-page "https://bitbucket.org/neogeny/grako")
     (synopsis "EBNF parser generator")
@@ -5365,7 +5375,7 @@ cluster without needing to write any wrapper code yourself.")
         (base32 "0zizn61n5z5hq421hkypk9pw8s6fpxw30f4hsg7k4ivwzy3gjw9j"))))
     (build-system python-build-system)
     (native-inputs
-     `(("python-pytest" ,python-pytest-3.0)
+     `(("python-pytest" ,python-pytest)
        ("python-mock" ,python-mock)
        ("python-tox" ,python-tox)
        ("which" ,which))) ;for tests
@@ -5428,7 +5438,7 @@ displayed.")
          (replace 'check (lambda _ (zero? (system* "nosetests" "-v")))))))
     (native-inputs
      `(("python-nose" ,python-nose)
-       ("python-pytest" ,python-pytest-3.0)
+       ("python-pytest" ,python-pytest)
        ("man-db" ,man-db)
        ("which" ,which)
        ("bash-full" ,bash)))                 ;full Bash for 'test_replwrap.py'
@@ -5449,13 +5459,13 @@ child application and control it as if a human were typing commands.")
 (define-public python-setuptools-scm
   (package
     (name "python-setuptools-scm")
-    (version "1.15.0")
+    (version "1.15.6")
     (source (origin
               (method url-fetch)
               (uri (pypi-uri "setuptools_scm" version))
               (sha256
                (base32
-                "0bwyc5markib0i7i2qlyhdzxhiywzxbkfiapldma8m91m82jvwfs"))))
+                "0pzvfmx8s20yrgkgwfbxaspz2x1g38qv61jpm0ns91lrb22ldas9"))))
     (build-system python-build-system)
     (home-page "https://github.com/pypa/setuptools_scm/")
     (synopsis "Manage Python package versions in SCM metadata")
@@ -6990,14 +7000,14 @@ PEP 8.")
 (define-public python-pyflakes
   (package
     (name "python-pyflakes")
-    (version "1.0.0")
+    (version "1.5.0")
     (source
       (origin
         (method url-fetch)
         (uri (pypi-uri "pyflakes" version))
         (sha256
           (base32
-            "0qs2sgqszq7wcplis8509wk2ygqcrwzbs1ghfj3svvivq2j377pk"))))
+            "1x1pcca4a24k4pw8x1c77sgi58cg1wl2k38mp8a25k608pzls3da"))))
     (build-system python-build-system)
     (home-page
       "https://github.com/pyflakes/pyflakes")
@@ -7012,17 +7022,17 @@ PEP 8.")
 (define-public python-mccabe
   (package
     (name "python-mccabe")
-    (version "0.4.0")
+    (version "0.6.1")
     (source
       (origin
         (method url-fetch)
         (uri (pypi-uri "mccabe" version))
         (sha256
           (base32
-            "0yr08a36h8lqlif10l4xcikbbig7q8f41gqywir7rrvnv3mi4aws"))))
+            "07w3p1qm44hgxf3vvwz84kswpsx6s7kvaibzrsx5dzm0hli1i3fx"))))
     (build-system python-build-system)
     (native-inputs
-      `(("python-pytest" ,python-pytest)
+      `(("python-pytest" ,python-pytest-bootstrap)
         ("python-pytest-runner" ,python-pytest-runner)))
     (home-page "https://github.com/flintwork/mccabe")
     (synopsis "McCabe checker, plugin for flake8")
@@ -7095,39 +7105,48 @@ complexity of Python source code.")
 (define-public python-flake8
   (package
     (name "python-flake8")
-    (version "2.5.4")
+    (version "3.4.1")
     (source
       (origin
         (method url-fetch)
         (uri (pypi-uri "flake8" version))
         (sha256
           (base32
-            "0bs9cz4fr99r2rwig1b8jwaadl1nan7kgpdzqwj0bwbckwbmh7nc"))
-        (modules '((guix build utils)))
-        (snippet
-         '(begin
-            ;; Remove pre-compiled .pyc files from source.
-            (for-each delete-file-recursively
-                      (find-files "." "__pycache__" #:directories? #t))
-            (for-each delete-file (find-files "." "\\.pyc$"))
-            #t))))
+            "1n0i38592vy3q0x2a9bf8z6rhhn04i30wsn5i5zzcj7qkxvl8062"))))
     (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (delete 'check)
+         (add-after 'install 'check
+          (lambda* (#:key inputs outputs #:allow-other-keys)
+            (add-installed-pythonpath inputs outputs)
+            (zero? (system* "pytest" "-v")))))))
     (propagated-inputs
-      `(("python-pep8" ,python-pep8)
+      `(("python-pycodestyle" ,python-pycodestyle)
         ("python-pyflakes" ,python-pyflakes)
+        ;; flake8 depends on a newer setuptools than provided by python.
+        ("python-setuptools" ,python-setuptools)
         ("python-mccabe" ,python-mccabe)))
     (native-inputs
       `(("python-mock" ,python-mock) ; TODO: only required for < 3.3
-        ("python-nose" ,python-nose)))
+        ("python-pytest" ,python-pytest-bootstrap)
+        ("python-pytest-runner" ,python-pytest-runner)))
     (home-page "https://gitlab.com/pycqa/flake8")
     (synopsis
       "The modular source code checker: pep8, pyflakes and co")
     (description
       "Flake8 is a wrapper around PyFlakes, pep8 and python-mccabe.")
+    (properties `((python2-variant . ,(delay python2-flake8))))
     (license license:expat)))
 
 (define-public python2-flake8
-  (package-with-python2 python-flake8))
+  (let ((base (package-with-python2 (strip-python2-variant python-flake8))))
+    (package (inherit base)
+      (propagated-inputs
+       `(("python2-configparser" ,python2-configparser)
+         ("python2-enum" ,python2-enum)
+          ,@(package-propagated-inputs base))))))
 
 (define-public python-flake8-polyfill
   (package
@@ -8008,7 +8027,7 @@ responses, rather than doing any computation.")
        ("python-hypothesis" ,python-hypothesis)
        ("python-pretend" ,python-pretend)
        ("python-pytz" ,python-pytz)
-       ("python-pytest" ,python-pytest-3.0)))
+       ("python-pytest" ,python-pytest)))
     (home-page "https://github.com/pyca/cryptography")
     (synopsis "Cryptographic recipes and primitives for Python")
     (description
@@ -8068,7 +8087,7 @@ message digests and key derivation functions.")
     (native-inputs
      `(("python-flaky" ,python-flaky)
        ("python-pretend" ,python-pretend)
-       ("python-pytest" ,python-pytest-3.0)))
+       ("python-pytest" ,python-pytest)))
     (home-page "https://github.com/pyca/pyopenssl")
     (synopsis "Python wrapper module around the OpenSSL library")
     (description
@@ -10138,7 +10157,7 @@ Amazon Web Services (AWS) API.")
     (build-system python-build-system)
     (native-inputs
      `(("python-flake8" ,python-flake8)
-       ("python-pytest" ,python-pytest)))
+       ("python-pytest" ,python-pytest-bootstrap)))
     (synopsis "Library for property based testing")
     (description "Hypothesis is a library for testing your Python code against a
 much larger range of examples than you would ever want to write by hand.  It’s
@@ -15035,7 +15054,7 @@ for Flask.")
          "0gf2dpahpl5igb7jh1sr9acj3z3gp7zahqdqb69nk6wx01c8kc1g"))))
     (build-system python-build-system)
     (propagated-inputs
-     `(("pytest" ,python-pytest-3.0)))
+     `(("pytest" ,python-pytest)))
     (home-page "https://github.com/fschulze/pytest-warnings")
     (synopsis "Pytest plugin to list Python warnings in pytest report")
     (description
@@ -15059,7 +15078,7 @@ pytest report.")
          "038049nyjl7di59ycnxvc9nydivc5m8np3hqq84j2iirkccdbs5n"))))
     (build-system python-build-system)
     (propagated-inputs
-     `(("pytest" ,python-pytest-3.0)))
+     `(("pytest" ,python-pytest)))
     (home-page "http://bitbucket.org/memedough/pytest-capturelog/overview")
     (synopsis "Pytest plugin to catch log messages")
     (description
@@ -15084,7 +15103,7 @@ pytest report.")
     (native-inputs
      `(("unzip" ,unzip)))
     (propagated-inputs
-     `(("pytest" ,python-pytest-3.0)))
+     `(("pytest" ,python-pytest)))
     (home-page "https://github.com/eisensheng/pytest-catchlog")
     (synopsis "Pytest plugin to catch log messages")
     (description
@@ -16075,7 +16094,7 @@ address is valid and really exists.")
      `(("python-dateutil" ,python-dateutil)
        ("python-simplejson" ,python-simplejson)))
     (native-inputs
-     `(("python-pytest-3.0" ,python-pytest-3.0)
+     `(("python-pytest" ,python-pytest)
        ("python-pytz" ,python-pytz)))
     (home-page "https://github.com/marshmallow-code/marshmallow")
     (synopsis "Convert complex datatypes to and from native
@@ -16122,7 +16141,7 @@ complex datatypes to and from native Python datatypes.")
     (propagated-inputs
      `(("python-pyyaml" ,python-pyyaml)))
     (native-inputs
-     `(("python-pytest-3.0" ,python-pytest-3.0)
+     `(("python-pytest" ,python-pytest)
        ("python-flask" ,python-flask)
        ("python-marshmallow" ,python-marshmallow)
        ("python-tornado" ,python-tornado)
@@ -16175,7 +16194,7 @@ Swagger 2.0).")
        ("python-flake8" ,python-flake8)
        ("python-flask-restful" ,python-flask-restful)
        ("python-flex" ,python-flex)
-       ("python-pytest-3.0" ,python-pytest-3.0)
+       ("python-pytest" ,python-pytest)
        ("python-pytest-cov" ,python-pytest-cov)
        ("python-marshmallow" ,python-marshmallow)
        ("python-apispec" ,python-apispec)))
@@ -16678,7 +16697,7 @@ their files and supports any packaging format (including wheels).")
      `(;; The tests depend on unittest2, and our version is a bit too old.
        #:tests? #f))
     (native-inputs
-     `(("python-pbr" ,python-pbr)))
+     `(("python-pbr" ,python-pbr-minimal)))
     (home-page
       "https://github.com/testing-cabal/linecache2")
     (synopsis "Backports of the linecache module")
@@ -16707,7 +16726,7 @@ lines are read from a single file.")
      `(;; python-traceback2 and python-unittest2 depend on one another.
        #:tests? #f))
     (native-inputs
-     `(("python-pbr" ,python-pbr)))
+     `(("python-pbr" ,python-pbr-minimal)))
     (propagated-inputs
       `(("python-linecache2" ,python-linecache2)))
     (home-page
diff --git a/gnu/packages/tls.scm b/gnu/packages/tls.scm
index fe4c908c32..bb66fabc4c 100644
--- a/gnu/packages/tls.scm
+++ b/gnu/packages/tls.scm
@@ -515,7 +515,7 @@ netcat implementation that supports TLS.")
                #t))))))
     ;; TODO: Add optional inputs for testing.
     (native-inputs
-     `(("python-mock" ,python-mock-2)
+     `(("python-mock" ,python-mock)
        ;; For documentation
        ("python-sphinx" ,python-sphinx)
        ("python-sphinxcontrib-programoutput" ,python-sphinxcontrib-programoutput)
@@ -564,7 +564,7 @@ netcat implementation that supports TLS.")
     ;; TODO: Add optional inputs for testing.
     (native-inputs
      `(("python-nose" ,python-nose)
-       ("python-mock" ,python-mock-2)
+       ("python-mock" ,python-mock)
        ;; For documentation
        ("python-sphinx" ,python-sphinx)
        ("python-sphinx-rtd-theme" ,python-sphinx-rtd-theme)
diff --git a/gnu/packages/web.scm b/gnu/packages/web.scm
index 04886e06e3..a544680143 100644
--- a/gnu/packages/web.scm
+++ b/gnu/packages/web.scm
@@ -5154,7 +5154,7 @@ command-line arguments or read from stdin.")
        ("python-schema" ,python-schema-0.5)
        ("python-backports-csv" ,python-backports-csv)))
     (native-inputs
-     `(("python-pytest-3.0" ,python-pytest-3.0)
+     `(("python-pytest" ,python-pytest)
        ("python-pytest-capturelog" ,python-pytest-capturelog)
        ("python-responses" ,python-responses)))
     (home-page "https://github.com/jjjake/internetarchive")