Merge branch 'master' into tiff-old-jpeg

2024-12-26 18:06:18 +03:00 · 2019-02-15 19:56:17 +11:00 · 2019-02-15 19:56:17 +11:00 · 1a7a1123e6
commit 1a7a1123e6
parent e91b851fdc 30879dfb34
274 changed files with 1800 additions and 1398 deletions
--- a/.appveyor.yml
+++ b/.appveyor.yml
@ -25,8 +25,6 @@ environment:
  - PYTHON: C:/Python36-x64
  - PYTHON: C:/Python35
  - PYTHON: C:/Python35-x64
-  - PYTHON: C:/Python34
-  - PYTHON: C:/Python34-x64
  - PYTHON: C:/msys64/mingw32
    EXECUTABLE: bin/python3
    PIP_DIR: bin
--- a/.gitattributes
+++ b/.gitattributes
@ -1,2 +1,3 @@
+*.eps binary
 *.ppm binary
 *.container binary
--- a/.gitignore
+++ b/.gitignore
@ -56,6 +56,9 @@ test_images
 # Sphinx documentation
 docs/_build/

+# viewdoc output
+.long-description.html
+
 # Vim cruft
 .*.swp

--- a/.travis.yml
+++ b/.travis.yml
@ -16,12 +16,12 @@ matrix:
    - python: "3.6"
      name: "Lint"
      env: LINT="true"
-    - python: "pypy"
-      name: "PyPy Trusty"
-      dist: trusty
-    - python: "pypy3"
-      name: "PyPy3 Trusty"
-      dist: trusty
+    - python: "pypy2.7-6.0"
+      name: "PyPy2 Xenial"
+      dist: xenial
+    - python: "pypy3.5-6.0"
+      name: "PyPy3 Xenial"
+      dist: xenial
    - python: '3.7'
      name: "3.7 Xenial"
    - python: '2.7'
@ -31,6 +31,7 @@ matrix:
      dist: trusty
    - python:  "2.7_with_system_site_packages" # For PyQt4
      name: "2.7_with_system_site_packages Xenial"
+      services: xvfb
    - python:  "2.7_with_system_site_packages" # For PyQt4
      name: "2.7_with_system_site_packages Trusty"
      dist: trusty
@ -46,43 +47,47 @@ matrix:
      name: "3.5 Trusty PYTHONOPTIMIZE=2"
      dist: trusty
      env: PYTHONOPTIMIZE=2
-    - python: '3.4'
-      name: "3.4 Trusty"
-      dist: trusty
-    - env: DOCKER="alpine" DOCKER_TAG="pytest"
-    - env: DOCKER="arch" DOCKER_TAG="pytest" # contains PyQt5
-    - env: DOCKER="ubuntu-trusty-x86" DOCKER_TAG="pytest"
-    - env: DOCKER="ubuntu-xenial-amd64" DOCKER_TAG="pytest"
-    - env: DOCKER="debian-stretch-x86" DOCKER_TAG="pytest"
-    - env: DOCKER="centos-6-amd64" DOCKER_TAG="pytest"
-    - env: DOCKER="centos-7-amd64" DOCKER_TAG="pytest"
-    - env: DOCKER="amazon-1-amd64" DOCKER_TAG="pytest"
-    - env: DOCKER="amazon-2-amd64" DOCKER_TAG="pytest"
-    - env: DOCKER="fedora-26-amd64" DOCKER_TAG="pytest"
-    - env: DOCKER="fedora-27-amd64" DOCKER_TAG="pytest"
+    - python: "3.8-dev"
+      name: "3.8-dev Xenial"
+    - env: DOCKER="alpine" DOCKER_TAG="master"
+    - env: DOCKER="arch" DOCKER_TAG="master" # contains PyQt5
+    - env: DOCKER="ubuntu-trusty-x86" DOCKER_TAG="master"
+    - env: DOCKER="ubuntu-xenial-amd64" DOCKER_TAG="master"
+    - env: DOCKER="debian-stretch-x86" DOCKER_TAG="master"
+    - env: DOCKER="centos-6-amd64" DOCKER_TAG="master"
+    - env: DOCKER="centos-7-amd64" DOCKER_TAG="master"
+    - env: DOCKER="amazon-1-amd64" DOCKER_TAG="master"
+    - env: DOCKER="amazon-2-amd64" DOCKER_TAG="master"
+    - env: DOCKER="fedora-28-amd64" DOCKER_TAG="master"
+    - env: DOCKER="fedora-29-amd64" DOCKER_TAG="master"

 services:
  - docker

+before_install:
+  - if [ "$DOCKER" ]; then travis_retry docker pull pythonpillow/$DOCKER:$DOCKER_TAG; fi
+
 install:
  - |
    if [ "$LINT" == "true" ]; then
-      pip install -U flake8
+      pip install tox
    elif [ "$DOCKER" == "" ]; then
      .travis/install.sh;
    fi

-before_install:
-  - if [ "$DOCKER" ]; then travis_retry docker pull pythonpillow/$DOCKER:$DOCKER_TAG; fi
-
 before_script:
 # Qt needs a display for some of the tests, and it's only run on the system site packages install
-  - "export DISPLAY=:99.0"
-  - "sh -e /etc/init.d/xvfb start"
+- |
+  if [ "$TRAVIS_JOB_NAME" == "2.7_with_system_site_packages Trusty" ]; then
+    export DISPLAY=:99.0
+    sh -e /etc/init.d/xvfb start
+  fi

 script:
 - |
-  if [ "$DOCKER" == "" ] && [ "$LINT" == "" ]; then
+  if [ "$LINT" == "true" ]; then
+    tox -e lint
+  elif [ "$DOCKER" == "" ]; then
    .travis/script.sh
  elif [ "$DOCKER" ]; then
    # the Pillow user in the docker container is UID 1000
@ -92,8 +97,6 @@ script:

 after_success:
 - |
-  if [ "$LINT" == "true" ]; then
-    flake8 --statistics --count
-  else
+  if [ "$LINT" == "" ]; then
    .travis/after_success.sh
  fi
--- a/CHANGES.rst
+++ b/CHANGES.rst
@ -2,9 +2,135 @@
 Changelog (Pillow)
 ==================

-5.4.0 (unreleased)
+6.0.0 (unreleased)
 ------------------

+- Remove unnecessary unittest.main() boilerplate from test files #3631
+  [jdufresne]
+
+- Exif: Seek to IFD offset #3584
+  [radarhere]
+
+- Deprecate PIL.*ImagePlugin.__version__ attributes #3628
+  [jdufresne]
+
+- Docs: Add note about ImageDraw operations that exceed image bounds #3620
+  [radarhere]
+
+- Allow for unknown PNG chunks after image data #3558
+  [radarhere]
+
+- Changed EPS subprocess stdin from devnull to None #3611
+  [radarhere]
+
+- Fix possible integer overflow #3609
+  [cgohlke]
+
+- Catch BaseException for resource cleanup handlers #3574
+  [jdufresne]
+
+- Improve pytest configuration to allow specific tests as CLI args #3579
+  [jdufresne]
+
+- Drop support for Python 3.4 #3596
+  [hugovk]
+
+- Remove deprecated PIL.OleFileIO #3598
+  [hugovk]
+
+- Remove deprecated ImageOps undocumented functions #3599
+  [hugovk]
+
+- Depends: Update libwebp to 1.0.2 #3602
+  [radarhere]
+
+- Detect MIME types #3525
+  [radarhere]
+
+5.4.1 (2019-01-06)
+------------------
+
+- File closing: Only close __fp if not fp #3540
+  [radarhere]
+
+- Fix build for Termux #3529
+  [pslacerda]
+
+- PNG: Detect MIME types #3525
+  [radarhere]
+
+- PNG: Handle IDAT chunks after image end #3532
+  [radarhere]
+
+5.4.0 (2019-01-01)
+------------------
+
+- Docs: Improved ImageChops documentation #3522
+  [radarhere]
+
+- Allow RGB and RGBA values for P image putpixel #3519
+  [radarhere]
+
+- Add APNG extension to PNG plugin #3501
+  [pirate486743186, radarhere]
+
+- Lookup ld.so.cache instead of hardcoding search paths #3245
+  [pslacerda]
+
+- Added custom string TIFF tags #3513
+  [radarhere]
+
+- Improve setup.py configuration #3395
+  [diorcety]
+
+- Read textual chunks located after IDAT chunks for PNG #3506
+  [radarhere]
+
+- Performance: Don't try to hash value if enum is empty #3503
+  [Glandos]
+
+- Added custom int and float TIFF tags #3350
+  [radarhere]
+
+- Fixes for issues reported by static code analysis #3393
+  [frenzymadness]
+
+- GIF: Wait until mode is normalized to copy im.info into encoderinfo #3187
+  [radarhere]
+
+- Docs: Add page of deprecations and removals #3486
+  [hugovk]
+
+- Travis CI: Upgrade PyPy from 5.8.0 to 6.0 #3488
+  [hugovk]
+
+- Travis CI: Allow lint job to fail #3467
+  [hugovk]
+
+- Resolve __fp when closing and deleting #3261
+  [radarhere]
+
+- Close exclusive fp before discarding #3461
+  [radarhere]
+
+- Updated open files documentation #3490
+  [radarhere]
+
+- Added libjpeg_turbo to check_feature #3493
+  [radarhere]
+
+- Change color table index background to tuple when saving as WebP #3471
+  [radarhere]
+
+- Allow arbitrary number of comment extension subblocks #3479
+  [radarhere]
+
+- Ensure previous FLI frame is loaded before seeking to the next #3478
+  [radarhere]
+
+- ImageShow improvements #3450
+  [radarhere]
+
 - Depends: Update libimagequant to 2.12.2 #3442, libtiff to 4.0.10 #3458, libwebp to 1.0.1 #3468, Tk Tcl to 8.6.9 #3465
  [radarhere]

--- a/2
+++ b/2
@ -5,7 +5,7 @@ The Python Imaging Library (PIL) is

 Pillow is the friendly PIL fork. It is

-    Copyright © 2010-2018 by Alex Clark and contributors
+    Copyright © 2010-2019 by Alex Clark and contributors

 Like PIL, Pillow is licensed under the open source PIL Software License:

--- a/MANIFEST.in
+++ b/MANIFEST.in
@ -22,6 +22,7 @@ exclude .coveragerc
 exclude .codecov.yml
 exclude .editorconfig
 exclude .landscape.yaml
+exclude .readthedocs.yml
 exclude .travis
 exclude .travis/*
 exclude tox.ini
--- a/README.rst
+++ b/README.rst
@ -16,7 +16,7 @@ Pillow is the friendly PIL fork by `Alex Clark and Contributors <https://github.
    * - tests
      - |linux| |macos| |windows| |coverage|
    * - package
-      - |zenodo| |version| |downloads|
+      - |zenodo| |tidelift| |version| |downloads|
    * - social
      - |gitter| |twitter|

@ -28,7 +28,7 @@ Pillow is the friendly PIL fork by `Alex Clark and Contributors <https://github.
   :target: https://travis-ci.org/python-pillow/Pillow
   :alt: Travis CI build status (Linux)

-.. |macos| image:: https://img.shields.io/travis/python-pillow/pillow-wheels/latest.svg?label=macOS%20build
+.. |macos| image:: https://img.shields.io/travis/python-pillow/pillow-wheels/master.svg?label=macOS%20build
   :target: https://travis-ci.org/python-pillow/pillow-wheels
   :alt: Travis CI build status (macOS)

@ -43,12 +43,15 @@ Pillow is the friendly PIL fork by `Alex Clark and Contributors <https://github.
 .. |zenodo| image:: https://zenodo.org/badge/17549/python-pillow/Pillow.svg
   :target: https://zenodo.org/badge/latestdoi/17549/python-pillow/Pillow

+.. |tidelift| image:: https://tidelift.com/badges/github/python-pillow/Pillow?style=flat
+   :target: https://tidelift.com/subscription/pkg/pypi-pillow?utm_source=pypi-pillow&utm_medium=referral&utm_campaign=readme
+
 .. |version| image:: https://img.shields.io/pypi/v/pillow.svg
   :target: https://pypi.org/project/Pillow/
   :alt: Latest PyPI version

 .. |downloads| image:: https://img.shields.io/pypi/dm/pillow.svg
-   :target: https://pypi.python.org/pypi/Pillow/
+   :target: https://pypi.org/project/Pillow/
   :alt: Number of PyPI downloads

 .. |gitter| image:: https://badges.gitter.im/python-pillow/Pillow.svg
--- a/RELEASING.md
+++ b/RELEASING.md
@ -5,52 +5,52 @@
 Released quarterly on the first day of January, April, July, October.

 * [ ] Open a release ticket e.g. https://github.com/python-pillow/Pillow/issues/3154
-* [ ] Develop and prepare release in ``master`` branch.
-* [ ] Check [Travis CI](https://travis-ci.org/python-pillow/Pillow) and [AppVeyor CI](https://ci.appveyor.com/project/python-pillow/Pillow) to confirm passing tests in ``master`` branch.
+* [ ] Develop and prepare release in `master` branch.
+* [ ] Check [Travis CI](https://travis-ci.org/python-pillow/Pillow) and [AppVeyor CI](https://ci.appveyor.com/project/python-pillow/Pillow) to confirm passing tests in `master` branch.
 * [ ] Check that all of the wheel builds [Pillow Wheel Builder](https://github.com/python-pillow/pillow-wheels) pass the tests in Travis CI.
 * [ ] In compliance with [PEP 440](https://www.python.org/dev/peps/pep-0440/), update version identifier in `src/PIL/_version.py`
 * [ ] Update `CHANGES.rst`.
 * [ ] Run pre-release check via `make release-test` in a freshly cloned repo.
 * [ ] Create branch and tag for release e.g.:
-```
-    $ git branch 5.2.x
-    $ git tag 5.2.0
-    $ git push --all
-    $ git push --tags
-```
+  ```bash
+  git branch 5.2.x
+  git tag 5.2.0
+  git push --all
+  git push --tags
+  ```
 * [ ] Create source distributions e.g.:
-```
-    $ make sdist
-```
-* [ ] Create [binary distributions](#binary-distributions)
-* [ ] Upload all binaries and source distributions e.g. ``twine upload dist/Pillow-5.2.0-*``
+  ```bash
+  make sdist
+  ```
+* [ ] Create [binary distributions](https://github.com/python-pillow/Pillow/blob/master/RELEASING.md#binary-distributions)
+* [ ] Upload all binaries and source distributions e.g. `twine upload dist/Pillow-5.2.0*`
 * [ ] Create a [new release on GitHub](https://github.com/python-pillow/Pillow/releases/new)
-* [ ] In compliance with [PEP 440](https://www.python.org/dev/peps/pep-0440/), append `.dev0` to version identifier in `src/PIL/_version.py`
+* [ ] In compliance with [PEP 440](https://www.python.org/dev/peps/pep-0440/), increment and append `.dev0` to version identifier in `src/PIL/_version.py`

 ## Point Release

 Released as needed for security, installation or critical bug fixes.

-* [ ] Make necessary changes in ``master`` branch.
+* [ ] Make necessary changes in `master` branch.
 * [ ] Update `CHANGES.rst`.
-* [ ] Cherry pick individual commits from ``master`` branch to release branch e.g. ``5.2.x``.
-* [ ] Check [Travis CI](https://travis-ci.org/python-pillow/Pillow) to confirm passing tests in release branch e.g. ``5.2.x``.
 * [ ] Check out release branch e.g.:
-```
-    git checkout -t remotes/origin/5.2.x
-```
+  ```bash
+  git checkout -t remotes/origin/5.2.x
+  ```
+* [ ] Cherry pick individual commits from `master` branch to release branch e.g. `5.2.x`.
+* [ ] Check [Travis CI](https://travis-ci.org/python-pillow/Pillow) to confirm passing tests in release branch e.g. `5.2.x`.
 * [ ] In compliance with [PEP 440](https://www.python.org/dev/peps/pep-0440/), update version identifier in `src/PIL/_version.py`
 * [ ] Run pre-release check via `make release-test`.
 * [ ] Create tag for release e.g.:
-```
-    $ git tag 5.2.1
-    $ git push --tags
-```
+  ```bash
+  git tag 5.2.1
+  git push --tags
+  ```
 * [ ] Create source distributions e.g.:
-```
-    $ make sdist
-```
-* [ ] Create [binary distributions](#binary-distributions)
+  ```bash
+  make sdist
+  ```
+* [ ] Create [binary distributions](https://github.com/python-pillow/Pillow/blob/master/RELEASING.md#binary-distributions)
 * [ ] Create a [new release on GitHub](https://github.com/python-pillow/Pillow/releases/new)

 ## Embargoed Release
@ -64,41 +64,44 @@ Released as needed privately to individual vendors for critical security-related
 * [ ] Run pre-release check via `make release-test`
 * [ ] Amend any commits with the CVE #
 * [ ] On release date, tag and push to GitHub.
-```
-    git checkout 2.5.x
-    git tag 2.5.3
-    git push origin 2.5.x
-    git push origin --tags
-```
+  ```bash
+  git checkout 2.5.x
+  git tag 2.5.3
+  git push origin 2.5.x
+  git push origin --tags
+  ```
 * [ ] Create source distributions e.g.:
-```
-    $ make sdist
-```
-* [ ] Create [binary distributions](#binary-distributions)
+  ```bash
+  make sdist
+  ```
+* [ ] Create [binary distributions](https://github.com/python-pillow/Pillow/blob/master/RELEASING.md#binary-distributions)
 * [ ] Create a [new release on GitHub](https://github.com/python-pillow/Pillow/releases/new)

 ## Binary Distributions

 ### Windows
-* [ ] Contact @cgohlke for Windows binaries via release ticket e.g. https://github.com/python-pillow/Pillow/issues/1174.
-* [ ] Download and extract tarball from @cgohlke and ``twine upload *``.
+* [ ] Contact `@cgohlke` for Windows binaries via release ticket e.g. https://github.com/python-pillow/Pillow/issues/1174.
+* [ ] Download and extract tarball from `@cgohlke` and `twine upload *`.

 ### Mac and Linux
 * [ ] Use the [Pillow Wheel Builder](https://github.com/python-pillow/pillow-wheels):
-```
-    $ git clone https://github.com/python-pillow/pillow-wheels
-    $ cd pillow-wheels
-    $ git submodule init
-    $ git submodule update Pillow
-    $ cd Pillow
-    $ git fetch --all
-    $ git checkout [[release tag]]
-    $ cd ..
-    $ git commit -m "Pillow -> 5.2.0" Pillow
-    $ git push
-```
+  ```bash
+  git clone https://github.com/python-pillow/pillow-wheels
+  cd pillow-wheels
+  git submodule init
+  git submodule update Pillow
+  cd Pillow
+  git fetch --all
+  git checkout [[release tag]]
+  cd ..
+  git commit -m "Pillow -> 5.2.0" Pillow
+  git push
+  ```
 * [ ] Download distributions from the [Pillow Wheel Builder container](http://a365fff413fe338398b6-1c8a9b3114517dc5fe17b7c3f8c63a43.r19.cf2.rackcdn.com/).
-
+  ```bash
+  wget -m -A 'Pillow-<VERSION>*' \
+  http://a365fff413fe338398b6-1c8a9b3114517dc5fe17b7c3f8c63a43.r19.cf2.rackcdn.com
+  ```

 ## Publicize Release

@ -106,4 +109,4 @@ Released as needed privately to individual vendors for critical security-related

 ## Documentation

-* [ ] Make sure the default version for Read the Docs is the latest release version, i.e. ``5.2.0`` rather than ``latest`` e.g. https://pillow.readthedocs.io/en/5.2.x/
+* [ ] Make sure the default version for Read the Docs is the latest tagged release e.g. `d2d43879` (5.4.0)
--- a/Tests/README.rst
+++ b/Tests/README.rst
@ -13,28 +13,20 @@ Install::
 Execution
 ---------

-**If Pillow has been built in-place**
-
 To run an individual test::

-    python Tests/test_image.py
+    pytest Tests/test_image.py

-Run all the tests from the root of the Pillow source distribution::
+Or::

-    pytest -vx Tests
-
-Or with coverage::
-
-    pytest -vx --cov PIL --cov-report term Tests
-    coverage html
-    open htmlcov/index.html
-
-**If Pillow has been installed**
-
-To run an individual test::
-
-    pytest -k Tests/test_image.py
+    pytest -k test_image.py

 Run all the tests from the root of the Pillow source distribution::

    pytest
+
+Or with coverage::
+
+    pytest --cov PIL --cov-report term
+    coverage html
+    open htmlcov/index.html
--- a/Tests/init.py
+++ b/Tests/init.py
--- a/Tests/bench_cffi_access.py
+++ b/Tests/bench_cffi_access.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import unittest, PillowTestCase, hopper

 # Not running this test by default. No DOS against Travis CI.

--- a/Tests/bench_get.py
+++ b/Tests/bench_get.py
@ -1,4 +1,4 @@
-import helper
+from . import helper
 import timeit

 import sys
--- a/Tests/check_fli_overflow.py
+++ b/Tests/check_fli_overflow.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase
 from PIL import Image

 TEST_FILE = "Tests/images/fli_overflow.fli"
--- a/Tests/check_imaging_leaks.py
+++ b/Tests/check_imaging_leaks.py
@ -1,7 +1,7 @@
 #!/usr/bin/env python

 from __future__ import division
-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase
 import sys
 from PIL import Image

--- a/Tests/check_j2k_leaks.py
+++ b/Tests/check_j2k_leaks.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase
 import sys
 from PIL import Image
 from io import BytesIO
--- a/Tests/check_j2k_overflow.py
+++ b/Tests/check_j2k_overflow.py
@ -1,5 +1,5 @@
 from PIL import Image
-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase


 class TestJ2kEncodeOverflow(PillowTestCase):
--- a/Tests/check_jpeg_leaks.py
+++ b/Tests/check_jpeg_leaks.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import unittest, PillowTestCase, hopper
 from io import BytesIO
 import sys

--- a/Tests/check_large_memory.py
+++ b/Tests/check_large_memory.py
@ -1,6 +1,6 @@
 import sys

-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase

 # This test is not run automatically.
 #
--- a/Tests/check_large_memory_numpy.py
+++ b/Tests/check_large_memory_numpy.py
@ -1,6 +1,6 @@
 import sys

-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase

 # This test is not run automatically.
 #
--- a/Tests/check_libtiff_segfault.py
+++ b/Tests/check_libtiff_segfault.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase
 from PIL import Image

 TEST_FILE = "Tests/images/libtiff_segfault.tif"
--- a/Tests/check_png_dos.py
+++ b/Tests/check_png_dos.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase
 from PIL import Image, PngImagePlugin, ImageFile
 from io import BytesIO
 import zlib
--- a/Tests/createfontdatachunk.py
+++ b/Tests/createfontdatachunk.py
@ -2,7 +2,6 @@
 from __future__ import print_function
 import base64
 import os
-import sys

 if __name__ == "__main__":
    # create font data chunk for embedding
--- a/Tests/helper.py
+++ b/Tests/helper.py
@ -53,10 +53,6 @@ class PillowTestCase(unittest.TestCase):
        # holds last result object passed to run method:
        self.currentResult = None

-    # Nicer output for --verbose
-    def __str__(self):
-        return self.__class__.__name__ + "." + self._testMethodName
-
    def run(self, result=None):
        self.currentResult = result  # remember result for use later
        unittest.TestCase.run(self, result)  # call superclass run method
@ -84,7 +80,7 @@ class PillowTestCase(unittest.TestCase):
            self.assertTrue(
                all(x == y for x, y in zip(a, b)),
                msg or "got %s, expected %s" % (a, b))
-        except:
+        except Exception:
            self.assertEqual(a, b, msg)

    def assert_image(self, im, mode, size, msg=None):
@ -149,7 +145,7 @@ class PillowTestCase(unittest.TestCase):
                try:
                    url = test_image_results.upload(a, b)
                    logger.error("Url for test images: %s" % url)
-                except:
+                except Exception:
                    pass
            raise e

--- a/Tests/images/a_fli.png
+++ b/Tests/images/a_fli.png
--- a/Tests/images/balloon.jpf
+++ b/Tests/images/balloon.jpf
--- a/Tests/images/exif-ifd-offset.jpg
+++ b/Tests/images/exif-ifd-offset.jpg
--- a/Tests/images/hopper_idat_after_image_end.png
+++ b/Tests/images/hopper_idat_after_image_end.png
--- a/Tests/images/hopper_unknown_pixel_mode.tif
+++ b/Tests/images/hopper_unknown_pixel_mode.tif
--- a/Tests/images/hopper_zero_comment_subblocks.gif
+++ b/Tests/images/hopper_zero_comment_subblocks.gif
--- a/Tests/images/iss634.apng
+++ b/Tests/images/iss634.apng
--- a/Tests/images/sugarshack_ifd_offset.mpo
+++ b/Tests/images/sugarshack_ifd_offset.mpo
--- a/Tests/test_000_sanity.py
+++ b/Tests/test_000_sanity.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 import PIL
 import PIL.Image
@ -24,7 +24,3 @@ class TestSanity(PillowTestCase):
        PIL.Image.new("RGB", (100, 100))
        PIL.Image.new("I", (100, 100))
        PIL.Image.new("F", (100, 100))
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_binary.py
+++ b/Tests/test_binary.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import _binary

@ -22,7 +22,3 @@ class TestBinary(PillowTestCase):

        self.assertEqual(_binary.o16be(65535), b'\xff\xff')
        self.assertEqual(_binary.o32be(65535), b'\x00\x00\xff\xff')
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_bmp_reference.py
+++ b/Tests/test_bmp_reference.py
@ -1,5 +1,5 @@
 from __future__ import print_function
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image
 import os
@ -103,7 +103,3 @@ class TestBmpReference(PillowTestCase):
                               os.path.join(base, 'g', 'pal4rle.bmp'))
                if f not in unsupported:
                    self.fail("Unsupported Image %s: %s" % (f, msg))
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_box_blur.py
+++ b/Tests/test_box_blur.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image, ImageFilter

@ -215,7 +215,3 @@ class TestBoxBlur(PillowTestCase):
            passes=3,
            delta=1,
        )
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_color_lut.py
+++ b/Tests/test_color_lut.py
@ -3,7 +3,7 @@ from __future__ import division
 from array import array

 from PIL import Image, ImageFilter
-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase

 try:
    import numpy
@ -519,7 +519,3 @@ class TestTransformColorLut3D(PillowTestCase):
        self.assertEqual(lut.table[0:16], [
            0.0, 0.0, 0.0, 0.5,  0.25, 0.0, 0.0, 0.5,
            0.0, 0.0, 0.0, 0.5,  0.0, 0.16, 0.0, 0.5])
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_core_resources.py
+++ b/Tests/test_core_resources.py
@ -2,7 +2,7 @@ from __future__ import division, print_function

 import sys

-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase
 from PIL import Image


@ -179,7 +179,3 @@ class TestEnvVars(PillowTestCase):
        self.assert_warning(
            UserWarning, Image._apply_env_variables,
            {'PILLOW_BLOCKS_MAX': 'wat'})
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_decompression_bomb.py
+++ b/Tests/test_decompression_bomb.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image

@ -83,7 +83,3 @@ class TestDecompressionCrop(PillowTestCase):
        for value in error_values:
            with self.assertRaises(Image.DecompressionBombError):
                im.crop(value)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_features.py
+++ b/Tests/test_features.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase

 from PIL import features

@ -63,7 +63,3 @@ class TestFeatures(PillowTestCase):
        module = "unsupported_module"
        # Act / Assert
        self.assertRaises(ValueError, features.check_module, module)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_blp.py
+++ b/Tests/test_file_blp.py
@ -1,6 +1,6 @@
 from PIL import Image

-from helper import PillowTestCase, unittest
+from .helper import PillowTestCase


 class TestFileBlp(PillowTestCase):
@ -18,7 +18,3 @@ class TestFileBlp(PillowTestCase):
        im = Image.open("Tests/images/blp/blp2_dxt1a.blp")
        target = Image.open("Tests/images/blp/blp2_dxt1a.png")
        self.assert_image_equal(im, target)
-
-
-if __name__ == "__main__":
-    unittest.main()
--- a/Tests/test_file_bmp.py
+++ b/Tests/test_file_bmp.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image, BmpImagePlugin
 import io
@ -75,7 +75,3 @@ class TestFileBmp(PillowTestCase):
        im = BmpImagePlugin.DibImageFile('Tests/images/clipboard.dib')
        target = Image.open('Tests/images/clipboard_target.png')
        self.assert_image_equal(im, target)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_bufrstub.py
+++ b/Tests/test_file_bufrstub.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import BufrStubImagePlugin, Image

@ -40,7 +40,3 @@ class TestFileBufrStub(PillowTestCase):

        # Act / Assert: stub cannot save without an implemented handler
        self.assertRaises(IOError, im.save, tmpfile)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_container.py
+++ b/Tests/test_file_container.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image
 from PIL import ContainerIO
@ -123,7 +123,3 @@ class TestFileContainer(PillowTestCase):
            # Assert

            self.assertEqual(data, expected)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_cur.py
+++ b/Tests/test_file_cur.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image, CurImagePlugin

@ -26,9 +26,6 @@ class TestFileCur(PillowTestCase):
        no_cursors_file = "Tests/images/no_cursors.cur"

        cur = CurImagePlugin.CurImageFile(TEST_FILE)
+        cur.fp.close()
        with open(no_cursors_file, "rb") as cur.fp:
            self.assertRaises(TypeError, cur._open)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_dcx.py
+++ b/Tests/test_file_dcx.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image, DcxImagePlugin

@ -20,6 +20,12 @@ class TestFileDcx(PillowTestCase):
        orig = hopper()
        self.assert_image_equal(im, orig)

+    def test_unclosed_file(self):
+        def open():
+            im = Image.open(TEST_FILE)
+            im.load()
+        self.assert_warning(None, open)
+
    def test_invalid_file(self):
        with open("Tests/images/flower.jpg", "rb") as fp:
            self.assertRaises(SyntaxError,
@ -58,7 +64,3 @@ class TestFileDcx(PillowTestCase):

        # Act / Assert
        self.assertRaises(EOFError, im.seek, frame)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_dds.py
+++ b/Tests/test_file_dds.py
@ -1,6 +1,6 @@
 from io import BytesIO

-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase
 from PIL import Image, DdsImagePlugin

 TEST_FILE_DXT1 = "Tests/images/dxt1-rgb-4bbp-noalpha_MipMaps-1.dds"
@ -110,7 +110,3 @@ class TestFileDds(PillowTestCase):
            im.load()

        self.assertRaises(IOError, short_file)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_eps.py
+++ b/Tests/test_file_eps.py
@ -1,8 +1,10 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import unittest, PillowTestCase, hopper

 from PIL import Image, EpsImagePlugin
 import io

+HAS_GHOSTSCRIPT = EpsImagePlugin.has_ghostscript()
+
 # Our two EPS test files (they are identical except for their bounding boxes)
 file1 = "Tests/images/zero_bb.eps"
 file2 = "Tests/images/non_zero_bb.eps"
@ -20,10 +22,7 @@ file3 = "Tests/images/binary_preview_map.eps"

 class TestFileEps(PillowTestCase):

-    def setUp(self):
-        if not EpsImagePlugin.has_ghostscript():
-            self.skipTest("Ghostscript not available")
-
+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_sanity(self):
        # Regular scale
        image1 = Image.open(file1)
@ -57,6 +56,7 @@ class TestFileEps(PillowTestCase):
        self.assertRaises(SyntaxError,
                          EpsImagePlugin.EpsImageFile, invalid_file)

+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_cmyk(self):
        cmyk_image = Image.open("Tests/images/pil_sample_cmyk.eps")

@ -71,6 +71,7 @@ class TestFileEps(PillowTestCase):
            target = Image.open('Tests/images/pil_sample_rgb.jpg')
            self.assert_image_similar(cmyk_image, target, 10)

+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_showpage(self):
        # See https://github.com/python-pillow/Pillow/issues/2615
        plot_image = Image.open("Tests/images/reqd_showpage.eps")
@ -81,18 +82,21 @@ class TestFileEps(PillowTestCase):
        #  fonts could be slightly different
        self.assert_image_similar(plot_image, target, 6)

+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_file_object(self):
        # issue 479
        image1 = Image.open(file1)
        with open(self.tempfile('temp_file.eps'), 'wb') as fh:
            image1.save(fh, 'EPS')

+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_iobase_object(self):
        # issue 479
        image1 = Image.open(file1)
        with io.open(self.tempfile('temp_iobase.eps'), 'wb') as fh:
            image1.save(fh, 'EPS')

+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_bytesio_object(self):
        with open(file1, 'rb') as f:
            img_bytes = io.BytesIO(f.read())
@ -109,6 +113,7 @@ class TestFileEps(PillowTestCase):
        tmpfile = self.tempfile('temp.eps')
        self.assertRaises(ValueError, im.save, tmpfile)

+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_render_scale1(self):
        # We need png support for these render test
        codecs = dir(Image.core)
@ -129,6 +134,7 @@ class TestFileEps(PillowTestCase):
        image2_scale1_compare.load()
        self.assert_image_similar(image2_scale1, image2_scale1_compare, 10)

+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_render_scale2(self):
        # We need png support for these render test
        codecs = dir(Image.core)
@ -149,6 +155,7 @@ class TestFileEps(PillowTestCase):
        image2_scale2_compare.load()
        self.assert_image_similar(image2_scale2, image2_scale2_compare, 10)

+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_resize(self):
        # Arrange
        image1 = Image.open(file1)
@ -166,6 +173,7 @@ class TestFileEps(PillowTestCase):
        self.assertEqual(image2.size, new_size)
        self.assertEqual(image3.size, new_size)

+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_thumbnail(self):
        # Issue #619
        # Arrange
@ -233,6 +241,7 @@ class TestFileEps(PillowTestCase):
            img = Image.open(filename)
            self.assertEqual(img.mode, "RGB")

+    @unittest.skipUnless(HAS_GHOSTSCRIPT, "Ghostscript not available")
    def test_emptyline(self):
        # Test file includes an empty line in the header data
        emptyline_file = "Tests/images/zero_bb_emptyline.eps"
@ -242,7 +251,3 @@ class TestFileEps(PillowTestCase):
        self.assertEqual(image.mode, "RGB")
        self.assertEqual(image.size, (460, 352))
        self.assertEqual(image.format, "EPS")
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_fitsstub.py
+++ b/Tests/test_file_fitsstub.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import FitsStubImagePlugin, Image

@ -44,7 +44,3 @@ class TestFileFitsStub(PillowTestCase):
        self.assertRaises(
            IOError,
            FitsStubImagePlugin._save, im, dummy_fp, dummy_filename)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_fli.py
+++ b/Tests/test_file_fli.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image, FliImagePlugin

@ -27,6 +27,12 @@ class TestFileFli(PillowTestCase):
        self.assertEqual(im.info["duration"], 71)
        self.assertTrue(im.is_animated)

+    def test_unclosed_file(self):
+        def open():
+            im = Image.open(static_test_file)
+            im.load()
+        self.assert_warning(None, open)
+
    def test_tell(self):
        # Arrange
        im = Image.open(static_test_file)
@ -85,6 +91,9 @@ class TestFileFli(PillowTestCase):
        layer_number = im.tell()
        self.assertEqual(layer_number, 1)

+    def test_seek(self):
+        im = Image.open(animated_test_file)
+        im.seek(50)

-if __name__ == '__main__':
-    unittest.main()
+        expected = Image.open("Tests/images/a_fli.png")
+        self.assert_image_equal(im, expected)
--- a/Tests/test_file_fpx.py
+++ b/Tests/test_file_fpx.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase

 try:
    from PIL import FpxImagePlugin
@ -21,7 +21,3 @@ class TestFileFpx(PillowTestCase):
        ole_file = "Tests/images/test-ole-file.doc"
        self.assertRaises(SyntaxError,
                          FpxImagePlugin.FpxImageFile, ole_file)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_ftex.py
+++ b/Tests/test_file_ftex.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase
 from PIL import Image


@ -14,7 +14,3 @@ class TestFileFtex(PillowTestCase):
        im = Image.open('Tests/images/ftex_dxt1.ftc')
        target = Image.open('Tests/images/ftex_dxt1.png')
        self.assert_image_similar(im, target.convert('RGBA'), 15)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_gbr.py
+++ b/Tests/test_file_gbr.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image, GbrImagePlugin

@ -17,7 +17,3 @@ class TestFileGbr(PillowTestCase):
        target = Image.open('Tests/images/gbr.png')

        self.assert_image_equal(target, im)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_gd.py
+++ b/Tests/test_file_gd.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import GdImageFile

@ -20,7 +20,3 @@ class TestFileGd(PillowTestCase):
        invalid_file = "Tests/images/flower.jpg"

        self.assertRaises(IOError, GdImageFile.open, invalid_file)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_gif.py
+++ b/Tests/test_file_gif.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper, netpbm_available
+from .helper import unittest, PillowTestCase, hopper, netpbm_available

 from PIL import Image, ImagePalette, GifImagePlugin

@ -33,6 +33,12 @@ class TestFileGif(PillowTestCase):
        self.assertEqual(im.format, "GIF")
        self.assertEqual(im.info["version"], b"GIF89a")

+    def test_unclosed_file(self):
+        def open():
+            im = Image.open(TEST_GIF)
+            im.load()
+        self.assert_warning(None, open)
+
    def test_invalid_file(self):
        invalid_file = "Tests/images/flower.jpg"

@ -435,6 +441,23 @@ class TestFileGif(PillowTestCase):

        self.assertEqual(reread.info['comment'], im.info['comment'])

+    def test_comment_over_255(self):
+        out = self.tempfile('temp.gif')
+        im = Image.new('L', (100, 100), '#000')
+        comment = b"Test comment text"
+        while len(comment) < 256:
+            comment += comment
+        im.info['comment'] = comment
+        im.save(out)
+        reread = Image.open(out)
+
+        self.assertEqual(reread.info['comment'], comment)
+
+    def test_zero_comment_subblocks(self):
+        im = Image.open('Tests/images/hopper_zero_comment_subblocks.gif')
+        expected = Image.open(TEST_GIF)
+        self.assert_image_equal(im, expected)
+
    def test_version(self):
        out = self.tempfile('temp.gif')

@ -513,6 +536,27 @@ class TestFileGif(PillowTestCase):

        self.assertEqual(reloaded.info['transparency'], 253)

+    def test_rgb_transparency(self):
+        out = self.tempfile('temp.gif')
+
+        # Single frame
+        im = Image.new('RGB', (1, 1))
+        im.info['transparency'] = (255, 0, 0)
+        self.assert_warning(UserWarning, im.save, out)
+
+        reloaded = Image.open(out)
+        self.assertNotIn('transparency', reloaded.info)
+
+        # Multiple frames
+        im = Image.new('RGB', (1, 1))
+        im.info['transparency'] = b""
+        ims = [Image.new('RGB', (1, 1))]
+        self.assert_warning(UserWarning,
+                            im.save, out, save_all=True, append_images=ims)
+
+        reloaded = Image.open(out)
+        self.assertNotIn('transparency', reloaded.info)
+
    def test_bbox(self):
        out = self.tempfile('temp.gif')

@ -610,7 +654,3 @@ class TestFileGif(PillowTestCase):
        self.assertEqual(im.tile[0][3][0], 11)  # LZW bits
        # codec error prepatch
        im.load()
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_gimpgradient.py
+++ b/Tests/test_file_gimpgradient.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import GimpGradientFile

@ -119,7 +119,3 @@ class TestImage(PillowTestCase):
        # load returns raw palette information
        self.assertEqual(len(palette[0]), 1024)
        self.assertEqual(palette[1], "RGBA")
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_gimppalette.py
+++ b/Tests/test_file_gimppalette.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL.GimpPaletteFile import GimpPaletteFile

@ -28,7 +28,3 @@ class TestImage(PillowTestCase):

        # Assert
        self.assertEqual(mode, "RGB")
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_gribstub.py
+++ b/Tests/test_file_gribstub.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import GribStubImagePlugin, Image

@ -40,7 +40,3 @@ class TestFileGribStub(PillowTestCase):

        # Act / Assert: stub cannot save without an implemented handler
        self.assertRaises(IOError, im.save, tmpfile)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_hdf5stub.py
+++ b/Tests/test_file_hdf5stub.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Hdf5StubImagePlugin, Image

@ -44,7 +44,3 @@ class TestFileHdf5Stub(PillowTestCase):
        self.assertRaises(
            IOError,
            Hdf5StubImagePlugin._save, im, dummy_fp, dummy_filename)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_icns.py
+++ b/Tests/test_file_icns.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import unittest, PillowTestCase

 from PIL import Image, IcnsImagePlugin

@ -17,7 +17,10 @@ class TestFileIcns(PillowTestCase):
        # Loading this icon by default should result in the largest size
        # (512x512@2x) being loaded
        im = Image.open(TEST_FILE)
-        im.load()
+
+        # Assert that there is no unclosed file warning
+        self.assert_warning(None, im.load)
+
        self.assertEqual(im.mode, "RGBA")
        self.assertEqual(im.size, (1024, 1024))
        self.assertEqual(im.format, "ICNS")
@ -118,7 +121,3 @@ class TestFileIcns(PillowTestCase):
        with io.BytesIO(b'invalid\n') as fp:
            self.assertRaises(SyntaxError,
                              IcnsImagePlugin.IcnsFile, fp)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_ico.py
+++ b/Tests/test_file_ico.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 import io
 from PIL import Image, IcoImagePlugin
@ -82,7 +82,3 @@ class TestFileIco(PillowTestCase):
        self.assertEqual(
            im_saved.info['sizes'],
            {(16, 16), (24, 24), (32, 32), (48, 48)})
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_im.py
+++ b/Tests/test_file_im.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image, ImImagePlugin

@ -15,6 +15,12 @@ class TestFileIm(PillowTestCase):
        self.assertEqual(im.size, (128, 128))
        self.assertEqual(im.format, "IM")

+    def test_unclosed_file(self):
+        def open():
+            im = Image.open(TEST_IM)
+            im.load()
+        self.assert_warning(None, open)
+
    def test_tell(self):
        # Arrange
        im = Image.open(TEST_IM)
@ -63,7 +69,3 @@ class TestFileIm(PillowTestCase):

    def test_number(self):
        self.assertEqual(1.2, ImImagePlugin.number("1.2"))
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_iptc.py
+++ b/Tests/test_file_iptc.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image, IptcImagePlugin

@ -69,7 +69,3 @@ class TestFileIptc(PillowTestCase):

        # Assert
        self.assertEqual(mystdout.getvalue(), "61 62 63 \n")
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_jpeg.py
+++ b/Tests/test_file_jpeg.py
@ -1,5 +1,5 @@
-from helper import unittest, PillowTestCase, hopper
-from helper import djpeg_available, cjpeg_available
+from .helper import unittest, PillowTestCase, hopper
+from .helper import djpeg_available, cjpeg_available

 from io import BytesIO
 import os
@ -581,6 +581,15 @@ class TestFileJpeg(PillowTestCase):
        # OSError for unidentified image.
        self.assertEqual(im.info.get("dpi"), (72, 72))

+    def test_ifd_offset_exif(self):
+        # Arrange
+        # This image has been manually hexedited to have an IFD offset of 10,
+        # in contrast to normal 8
+        im = Image.open("Tests/images/exif-ifd-offset.jpg")
+
+        # Act / Assert
+        self.assertEqual(im._getexif()[306], '2017:03:13 23:03:09')
+

@unittest.skipUnless(sys.platform.startswith('win32'), "Windows only")
 class TestFileCloseW32(PillowTestCase):
@ -602,7 +611,3 @@ class TestFileCloseW32(PillowTestCase):
        self.assertTrue(fp.closed)
        # this should not fail, as load should have closed the file.
        os.remove(tmpfile)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_jpeg2k.py
+++ b/Tests/test_file_jpeg2k.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image, Jpeg2KImagePlugin
 from io import BytesIO
@ -39,6 +39,12 @@ class TestFileJpeg2k(PillowTestCase):
        self.assertEqual(im.mode, 'RGB')
        self.assertEqual(im.size, (640, 480))
        self.assertEqual(im.format, 'JPEG2000')
+        self.assertEqual(im.get_format_mimetype(), 'image/jp2')
+
+    def test_jpf(self):
+        im = Image.open('Tests/images/balloon.jpf')
+        self.assertEqual(im.format, 'JPEG2000')
+        self.assertEqual(im.get_format_mimetype(), 'image/jpx')

    def test_invalid_file(self):
        invalid_file = "Tests/images/flower.jpg"
@ -204,7 +210,3 @@ class TestFileJpeg2k(PillowTestCase):

        # Assert
        self.assertEqual(p.image.size, (640, 480))
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_libtiff.py
+++ b/Tests/test_file_libtiff.py
@ -1,5 +1,5 @@
 from __future__ import print_function
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper
 from PIL import features
 from PIL._util import py3

@ -8,6 +8,7 @@ import io
 import logging
 import itertools
 import os
+import distutils.version

 from PIL import Image, TiffImagePlugin, TiffTags

@ -194,7 +195,7 @@ class TestFileLibTiff(LibTiffTestCase):
        im = Image.open('Tests/images/hopper_g4.tif')
        for tag in im.tag_v2:
            try:
-                del(core_items[tag])
+                del core_items[tag]
            except KeyError:
                pass

@ -204,7 +205,7 @@ class TestFileLibTiff(LibTiffTestCase):
        #     4: "long",
        #     5: "rational",
        #     12: "double",
-        # type: dummy value
+        # Type: dummy value
        values = {2: 'test',
                  3: 1,
                  4: 2**20,
@ -222,7 +223,7 @@ class TestFileLibTiff(LibTiffTestCase):
                                     for _ in range(info.length))

        # Extra samples really doesn't make sense in this application.
-        del(new_ifd[338])
+        del new_ifd[338]

        out = self.tempfile("temp.tif")
        TiffImagePlugin.WRITE_LIBTIFF = True
@ -231,6 +232,37 @@ class TestFileLibTiff(LibTiffTestCase):

        TiffImagePlugin.WRITE_LIBTIFF = False

+    def test_custom_metadata(self):
+        custom = {
+            37000: 4,
+            37001: 4.2,
+            37002: 'custom tag value',
+            37003: u'custom tag value',
+            37004: b'custom tag value'
+        }
+
+        libtiff_version = TiffImagePlugin._libtiff_version()
+
+        libtiffs = [False]
+        if distutils.version.StrictVersion(libtiff_version) >= \
+           distutils.version.StrictVersion("4.0"):
+            libtiffs.append(True)
+
+        for libtiff in libtiffs:
+            TiffImagePlugin.WRITE_LIBTIFF = libtiff
+
+            im = hopper()
+
+            out = self.tempfile("temp.tif")
+            im.save(out, tiffinfo=custom)
+            TiffImagePlugin.WRITE_LIBTIFF = False
+
+            reloaded = Image.open(out)
+            for tag, value in custom.items():
+                if libtiff and isinstance(value, bytes):
+                    value = value.decode()
+                self.assertEqual(reloaded.tag_v2[tag], value)
+
    def test_int_dpi(self):
        # issue #1765
        im = hopper('RGB')
@ -673,8 +705,4 @@ class TestFileLibTiff(LibTiffTestCase):
        infile = "Tests/images/old-style-jpeg-compression.tif"
        im = Image.open(infile)

-        self.assert_image_equal_tofile(im, "Tests/images/old-style-jpeg-compression.png")
-
-
-if __name__ == '__main__':
-    unittest.main()
+        self.assert_image_equal_tofile(im, "Tests/images/old-style-jpeg-compression.png")
--- a/Tests/test_file_libtiff_small.py
+++ b/Tests/test_file_libtiff_small.py
@ -1,8 +1,6 @@
-from helper import unittest
-
 from PIL import Image

-from test_file_libtiff import LibTiffTestCase
+from .test_file_libtiff import LibTiffTestCase


 class TestFileLibTiffSmall(LibTiffTestCase):
@ -46,7 +44,3 @@ class TestFileLibTiffSmall(LibTiffTestCase):

        self.assertEqual(im.size, (128, 128))
        self._assert_noerr(im)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_mcidas.py
+++ b/Tests/test_file_mcidas.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image, McIdasImagePlugin

@ -28,7 +28,3 @@ class TestFileMcIdas(PillowTestCase):
        self.assertEqual(im.size, (1800, 400))
        im2 = Image.open(saved_file)
        self.assert_image_equal(im, im2)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_mic.py
+++ b/Tests/test_file_mic.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import unittest, PillowTestCase, hopper

 from PIL import Image, ImagePalette, features

@ -64,7 +64,3 @@ class TestFileMic(PillowTestCase):
        ole_file = "Tests/images/test-ole-file.doc"
        self.assertRaises(SyntaxError,
                          MicImagePlugin.MicImageFile, ole_file)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_mpo.py
+++ b/Tests/test_file_mpo.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase
 from io import BytesIO
 from PIL import Image

@ -31,6 +31,12 @@ class TestFileMpo(PillowTestCase):
            self.assertEqual(im.size, (640, 480))
            self.assertEqual(im.format, "MPO")

+    def test_unclosed_file(self):
+        def open():
+            im = Image.open(test_files[0])
+            im.load()
+        self.assert_warning(None, open)
+
    def test_app(self):
        for test_file in test_files:
            # Test APP/COM reader (@PIL135)
@ -56,6 +62,14 @@ class TestFileMpo(PillowTestCase):
            self.assertEqual(mpinfo[45056], b'0100')
            self.assertEqual(mpinfo[45057], 2)

+    def test_mp_offset(self):
+        # This image has been manually hexedited to have an IFD offset of 10
+        # in APP2 data, in contrast to normal 8
+        im = Image.open("Tests/images/sugarshack_ifd_offset.mpo")
+        mpinfo = im._getmp()
+        self.assertEqual(mpinfo[45056], b'0100')
+        self.assertEqual(mpinfo[45057], 2)
+
    def test_mp_attribute(self):
        for test_file in test_files:
            im = Image.open(test_file)
@ -136,7 +150,3 @@ class TestFileMpo(PillowTestCase):
            self.assertEqual(im.tell(), 1)
            jpg1 = self.frame_roundtrip(im)
            self.assert_image_similar(im, jpg1, 30)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_msp.py
+++ b/Tests/test_file_msp.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import unittest, PillowTestCase, hopper

 from PIL import Image, MspImagePlugin

@ -78,7 +78,3 @@ class TestFileMsp(PillowTestCase):

        # Act/Assert
        self.assertRaises(IOError, im.save, filename)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_palm.py
+++ b/Tests/test_file_palm.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper, imagemagick_available
+from .helper import PillowTestCase, hopper, imagemagick_available

 import os.path

@ -52,7 +52,3 @@ class TestFilePalm(PillowTestCase):

        # Act / Assert
        self.assertRaises(IOError, self.helper_save_as_palm, mode)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_pcd.py
+++ b/Tests/test_file_pcd.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase
 from PIL import Image


@ -16,7 +16,3 @@ class TestFilePcd(PillowTestCase):

        # target = hopper().resize((768,512))
        # self.assert_image_similar(im, target, 10)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_pcx.py
+++ b/Tests/test_file_pcx.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image, ImageFile, PcxImagePlugin

@ -128,7 +128,3 @@ class TestFilePcx(PillowTestCase):
        for x in range(5):
            px[x, 3] = 0
        self._test_buffer_overflow(im)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_pdf.py
+++ b/Tests/test_file_pdf.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper
 from PIL import Image, PdfParser
 import io
 import os
@ -266,7 +266,3 @@ class TestFilePdf(PillowTestCase):
        f = io.BytesIO(f.getvalue())
        im.save(f, format="PDF", append=True)
        self.assertGreater(len(f.getvalue()), initial_size)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_pixar.py
+++ b/Tests/test_file_pixar.py
@ -1,4 +1,4 @@
-from helper import hopper, unittest, PillowTestCase
+from .helper import hopper, PillowTestCase

 from PIL import Image, PixarImagePlugin

@ -24,7 +24,3 @@ class TestFilePixar(PillowTestCase):
        self.assertRaises(
            SyntaxError,
            PixarImagePlugin.PixarImageFile, invalid_file)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_png.py
+++ b/Tests/test_file_png.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, PillowLeakTestCase, hopper
+from .helper import unittest, PillowTestCase, PillowLeakTestCase, hopper
 from PIL import Image, ImageFile, PngImagePlugin
 from PIL._util import py3

@ -6,6 +6,12 @@ from io import BytesIO
 import zlib
 import sys

+try:
+    from PIL import _webp
+    HAVE_WEBP = True
+except ImportError:
+    HAVE_WEBP = False
+
 codecs = dir(Image.core)


@ -80,6 +86,7 @@ class TestFilePng(PillowTestCase):
        self.assertEqual(im.mode, "RGB")
        self.assertEqual(im.size, (128, 128))
        self.assertEqual(im.format, "PNG")
+        self.assertEqual(im.get_format_mimetype(), 'image/png')

        hopper("1").save(test_file)
        Image.open(test_file)
@ -327,7 +334,9 @@ class TestFilePng(PillowTestCase):
        # Check open/load/verify exception (@PIL150)

        im = Image.open(TEST_PNG_FILE)
-        im.verify()
+
+        # Assert that there is no unclosed file warning
+        self.assert_warning(None, im.verify)

        im = Image.open(TEST_PNG_FILE)
        im.load()
@ -555,6 +564,42 @@ class TestFilePng(PillowTestCase):
        chunks = PngImagePlugin.getchunks(im)
        self.assertEqual(len(chunks), 3)

+    def test_textual_chunks_after_idat(self):
+        im = Image.open("Tests/images/hopper.png")
+        self.assertIn('comment', im.text.keys())
+        for k, v in {
+            'date:create': '2014-09-04T09:37:08+03:00',
+            'date:modify': '2014-09-04T09:37:08+03:00',
+        }.items():
+            self.assertEqual(im.text[k], v)
+
+        # Raises a SyntaxError in load_end
+        im = Image.open("Tests/images/broken_data_stream.png")
+        with self.assertRaises(IOError):
+            self.assertIsInstance(im.text, dict)
+
+        # Raises a UnicodeDecodeError in load_end
+        im = Image.open("Tests/images/truncated_image.png")
+        # The file is truncated
+        self.assertRaises(IOError, lambda: im.text)
+        ImageFile.LOAD_TRUNCATED_IMAGES = True
+        self.assertIsInstance(im.text, dict)
+        ImageFile.LOAD_TRUNCATED_IMAGES = False
+
+        # Raises an EOFError in load_end
+        im = Image.open("Tests/images/hopper_idat_after_image_end.png")
+        self.assertEqual(im.text, {'TXT': 'VALUE', 'ZIP': 'VALUE'})
+
+    @unittest.skipUnless(HAVE_WEBP and _webp.HAVE_WEBPANIM,
+                         "WebP support not installed with animation")
+    def test_apng(self):
+        im = Image.open("Tests/images/iss634.apng")
+        self.assertEqual(im.get_format_mimetype(), 'image/apng')
+
+        # This also tests reading unknown PNG chunks (fcTL and fdAT) in load_end
+        expected = Image.open("Tests/images/iss634.webp")
+        self.assert_image_similar(im, expected, 0.23)
+

@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or macOS")
 class TestTruncatedPngPLeaks(PillowLeakTestCase):
@ -581,7 +626,3 @@ class TestTruncatedPngPLeaks(PillowLeakTestCase):
            self._test_leak(core)
        finally:
            ImageFile.LOAD_TRUNCATED_IMAGES = False
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_ppm.py
+++ b/Tests/test_file_ppm.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image

@ -49,7 +49,3 @@ class TestFilePpm(PillowTestCase):

        with self.assertRaises(IOError):
            Image.open('Tests/images/negative_size.ppm')
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_psd.py
+++ b/Tests/test_file_psd.py
@ -1,4 +1,4 @@
-from helper import hopper, unittest, PillowTestCase
+from .helper import hopper, PillowTestCase

 from PIL import Image, PsdImagePlugin

@ -76,7 +76,3 @@ class TestImagePsd(PillowTestCase):
        im = Image.open("Tests/images/hopper_merged.psd")

        self.assertNotIn("icc_profile", im.info)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_sgi.py
+++ b/Tests/test_file_sgi.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image, SgiImagePlugin

@ -12,6 +12,7 @@ class TestFileSgi(PillowTestCase):

        im = Image.open(test_file)
        self.assert_image_equal(im, hopper())
+        self.assertEqual(im.get_format_mimetype(), 'image/rgb')

    def test_rgb16(self):
        test_file = "Tests/images/hopper16.rgb"
@ -26,6 +27,7 @@ class TestFileSgi(PillowTestCase):

        im = Image.open(test_file)
        self.assert_image_similar(im, hopper('L'), 2)
+        self.assertEqual(im.get_format_mimetype(), 'image/sgi')

    def test_rgba(self):
        # Created with ImageMagick:
@ -35,6 +37,7 @@ class TestFileSgi(PillowTestCase):
        im = Image.open(test_file)
        target = Image.open('Tests/images/transparent.png')
        self.assert_image_equal(im, target)
+        self.assertEqual(im.get_format_mimetype(), 'image/sgi')

    def test_rle(self):
        # Created with ImageMagick:
@ -86,7 +89,3 @@ class TestFileSgi(PillowTestCase):
        out = self.tempfile('temp.sgi')

        self.assertRaises(ValueError, im.save, out, format='sgi')
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_spider.py
+++ b/Tests/test_file_spider.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image
 from PIL import ImageSequence
@ -18,6 +18,12 @@ class TestImageSpider(PillowTestCase):
        self.assertEqual(im.size, (128, 128))
        self.assertEqual(im.format, "SPIDER")

+    def test_unclosed_file(self):
+        def open():
+            im = Image.open(TEST_FILE)
+            im.load()
+        self.assert_warning(None, open)
+
    def test_save(self):
        # Arrange
        temp = self.tempfile('temp.spider')
@ -113,7 +119,3 @@ class TestImageSpider(PillowTestCase):
        for i, frame in enumerate(ImageSequence.Iterator(im)):
            if i > 1:
                self.fail("Non-stack DOS file test failed")
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_sun.py
+++ b/Tests/test_file_sun.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import unittest, PillowTestCase, hopper

 from PIL import Image, SunImagePlugin

@ -45,7 +45,3 @@ class TestFileSun(PillowTestCase):
                # im.save(target_file)
                with Image.open(target_path) as target:
                    self.assert_image_equal(im, target)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_tar.py
+++ b/Tests/test_file_tar.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image, TarIO

@ -34,7 +34,3 @@ class TestFileTar(PillowTestCase):
    def test_contextmanager(self):
        with TarIO.TarIO(TEST_TAR_FILE, 'hopper.jpg'):
            pass
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_tga.py
+++ b/Tests/test_file_tga.py
@ -2,7 +2,7 @@ import os
 from glob import glob
 from itertools import product

-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image

@ -201,7 +201,3 @@ class TestFileTga(PillowTestCase):
            test_im.getchannel("A").getcolors()[0][0], num_transparent)

        self.assert_image_equal(im, test_im)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_tiff.py
+++ b/Tests/test_file_tiff.py
@ -2,7 +2,7 @@ import logging
 from io import BytesIO
 import sys

-from helper import unittest, PillowTestCase, hopper
+from .helper import unittest, PillowTestCase, hopper

 from PIL import Image, TiffImagePlugin
 from PIL._util import py3
@ -40,6 +40,12 @@ class TestFileTiff(PillowTestCase):
        hopper("I").save(filename)
        Image.open(filename)

+    def test_unclosed_file(self):
+        def open():
+            im = Image.open("Tests/images/multipage.tiff")
+            im.load()
+        self.assert_warning(None, open)
+
    def test_mac_tiff(self):
        # Read RGBa images from macOS [@PIL136]

@ -214,6 +220,10 @@ class TestFileTiff(PillowTestCase):
        self.assertEqual(
            im.getextrema(), (-3.140936851501465, 3.140684127807617))

+    def test_unknown_pixel_mode(self):
+        self.assertRaises(
+            IOError, Image.open, 'Tests/images/hopper_unknown_pixel_mode.tif')
+
    def test_n_frames(self):
        for path, n_frames in [
            ['Tests/images/multipage-lastframe.tif', 1],
@ -555,7 +565,3 @@ class TestFileTiffW32(PillowTestCase):
        # this should not fail, as load should have closed the file pointer,
        # and close should have closed the mmap
        os.remove(tmpfile)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_tiff_metadata.py
+++ b/Tests/test_file_tiff_metadata.py
@ -1,7 +1,7 @@
 import io
 import struct

-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image, TiffImagePlugin, TiffTags
 from PIL.TiffImagePlugin import _limit_rational, IFDRational
@ -135,7 +135,7 @@ class TestFileTiffMetadata(PillowTestCase):
        for k, v in original.items():
            if isinstance(v, IFDRational):
                original[k] = IFDRational(*_limit_rational(v, 2**31))
-            if isinstance(v, tuple) and isinstance(v[0], IFDRational):
+            elif isinstance(v, tuple) and isinstance(v[0], IFDRational):
                original[k] = tuple(IFDRational(*_limit_rational(elt, 2**31))
                                    for elt in v)

@ -247,7 +247,3 @@ class TestFileTiffMetadata(PillowTestCase):

        # Should not raise ValueError.
        self.assert_warning(UserWarning, lambda: ifd[277])
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_wal.py
+++ b/Tests/test_file_wal.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import WalImageFile

@ -17,7 +17,3 @@ class TestFileWal(PillowTestCase):
        self.assertEqual(im.format_description, "Quake2 Texture")
        self.assertEqual(im.mode, "P")
        self.assertEqual(im.size, (128, 128))
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_webp.py
+++ b/Tests/test_file_webp.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import unittest, PillowTestCase, hopper

 from PIL import Image, WebPImagePlugin

@ -153,6 +153,22 @@ class TestFileWebp(PillowTestCase):
            Image.open(blob).load()
            Image.open(blob).load()

+    @unittest.skipUnless(HAVE_WEBP and _webp.HAVE_WEBPANIM,
+                         "WebP save all not available")
+    def test_background_from_gif(self):
+        im = Image.open("Tests/images/chi.gif")
+        original_value = im.convert("RGB").getpixel((1, 1))

-if __name__ == '__main__':
-    unittest.main()
+        # Save as WEBP
+        out_webp = self.tempfile("temp.webp")
+        im.save(out_webp, save_all=True)
+
+        # Save as GIF
+        out_gif = self.tempfile("temp.gif")
+        Image.open(out_webp).save(out_gif)
+
+        reread = Image.open(out_gif)
+        reread_value = reread.convert("RGB").getpixel((1, 1))
+        difference = sum([abs(original_value[i] - reread_value[i])
+                          for i in range(0, 3)])
+        self.assertLess(difference, 5)
--- a/Tests/test_file_webp_alpha.py
+++ b/Tests/test_file_webp_alpha.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import unittest, PillowTestCase, hopper

 from PIL import Image

@ -115,7 +115,3 @@ class TestFileWebpAlpha(PillowTestCase):
        target = Image.open(file_path).convert("RGBA")

        self.assert_image_similar(image, target, 25.0)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_webp_animated.py
+++ b/Tests/test_file_webp_animated.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image

@ -151,7 +151,3 @@ class TestFileWebpAnimation(PillowTestCase):
            self.assertEqual(im.info["duration"], dur)
            self.assertEqual(im.info["timestamp"], ts)
            ts -= dur
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_webp_lossless.py
+++ b/Tests/test_file_webp_lossless.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image

@ -36,7 +36,3 @@ class TestFileWebpLossless(PillowTestCase):
        image.getdata()

        self.assert_image_equal(image, hopper(self.rgb_mode))
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_webp_metadata.py
+++ b/Tests/test_file_webp_metadata.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image

@ -133,7 +133,3 @@ class TestFileWebpMetadata(PillowTestCase):
        self.assertEqual(iccp_data, image.info.get('icc_profile', None))
        self.assertEqual(exif_data, image.info.get('exif', None))
        self.assertEqual(xmp_data, image.info.get('xmp', None))
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_wmf.py
+++ b/Tests/test_file_wmf.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image
 from PIL import WmfImagePlugin
@ -51,7 +51,3 @@ class TestFileWmf(PillowTestCase):
        for ext in [".wmf", ".emf"]:
            tmpfile = self.tempfile("temp"+ext)
            self.assertRaises(IOError, im.save, tmpfile)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_xbm.py
+++ b/Tests/test_file_xbm.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image

@ -60,7 +60,3 @@ class TestFileXbm(PillowTestCase):
        # Assert
        self.assertEqual(im.mode, '1')
        self.assertEqual(im.size, (128, 128))
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_xpm.py
+++ b/Tests/test_file_xpm.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image, XpmImagePlugin

@ -33,7 +33,3 @@ class TestFileXpm(PillowTestCase):

        # Assert
        self.assertEqual(len(data), 16384)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_file_xvthumb.py
+++ b/Tests/test_file_xvthumb.py
@ -1,4 +1,4 @@
-from helper import hopper, unittest, PillowTestCase
+from .helper import hopper, PillowTestCase

 from PIL import Image, XVThumbImagePlugin

@ -34,7 +34,3 @@ class TestFileXVThumb(PillowTestCase):
        # Act / Assert
        self.assertRaises(SyntaxError,
                          XVThumbImagePlugin.XVThumbImageFile, invalid_file)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_font_bdf.py
+++ b/Tests/test_font_bdf.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import FontFile, BdfFontFile

@ -18,7 +18,3 @@ class TestFontBdf(PillowTestCase):
    def test_invalid_file(self):
        with open("Tests/images/flower.jpg", "rb") as fp:
            self.assertRaises(SyntaxError, BdfFontFile.BdfFontFile, fp)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_font_leaks.py
+++ b/Tests/test_font_leaks.py
@ -1,5 +1,5 @@
 from __future__ import division
-from helper import unittest, PillowLeakTestCase
+from .helper import unittest, PillowLeakTestCase
 import sys
 from PIL import Image, features, ImageDraw, ImageFont

@ -31,7 +31,3 @@ class TestDefaultFontLeak(TestTTypeFontLeak):
    def test_leak(self):
        default_font = ImageFont.load_default()
        self._test_font(default_font)
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_font_pcf.py
+++ b/Tests/test_font_pcf.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase
+from .helper import PillowTestCase

 from PIL import Image, FontFile, PcfFontFile
 from PIL import ImageFont, ImageDraw
@ -79,7 +79,3 @@ class TestFontPcf(PillowTestCase):
        # accept bytes instances in Py3.
        if py3:
            self._test_high_characters(message.encode('latin1'))
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Tests/test_format_hsv.py
+++ b/Tests/test_format_hsv.py
@ -1,4 +1,4 @@
-from helper import unittest, PillowTestCase, hopper
+from .helper import PillowTestCase, hopper

 from PIL import Image
 from PIL._util import py3
@ -129,7 +129,3 @@ class TestFormatHSV(PillowTestCase):
        self.assert_image_similar(converted.getchannel(2),
                                  comparable.getchannel(2),
                                  3, "B conversion is wrong")
-
-
-if __name__ == '__main__':
-    unittest.main()
--- a/Show More
+++ b/Show More