diff --git a/.codecov.yml b/.codecov.yml
index d348345dc..060b2685e 100644
--- a/.codecov.yml
+++ b/.codecov.yml
@@ -3,7 +3,7 @@
 codecov:
   # Avoid "Missing base report" due to committing CHANGES.rst with "[CI skip]"
   # https://github.com/codecov/support/issues/363
-  # https://docs.codecov.io/v4.3.6/docs/comparing-commits
+  # https://docs.codecov.io/docs/comparing-commits
   allow_coverage_offsets: true
 
   token: 6dafc396-e7f5-4221-a38a-8b07a49fbdae
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 195ea3865..576b88414 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -20,6 +20,9 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
+    - name: Build system information
+      run: python .github/workflows/system-info.py
+
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/.github/workflows/system-info.py b/.github/workflows/system-info.py
new file mode 100644
index 000000000..8e840319a
--- /dev/null
+++ b/.github/workflows/system-info.py
@@ -0,0 +1,25 @@
+"""
+Print out some handy system info like Travis CI does.
+
+This sort of info is missing from GitHub Actions.
+
+Requested here:
+https://github.com/actions/virtual-environments/issues/79
+"""
+import os
+import platform
+import sys
+
+print("Build system information")
+print()
+
+print("sys.version\t\t", sys.version.split("\n"))
+print("os.name\t\t\t", os.name)
+print("sys.platform\t\t", sys.platform)
+print("platform.system()\t", platform.system())
+print("platform.machine()\t", platform.machine())
+print("platform.platform()\t", platform.platform())
+print("platform.version()\t", platform.version())
+print("platform.uname()\t", platform.uname())
+if sys.platform == "darwin":
+    print("platform.mac_ver()\t", platform.mac_ver())
diff --git a/.github/workflows/test-docker.yml b/.github/workflows/test-docker.yml
index 4121eb5e9..3e8a416a5 100644
--- a/.github/workflows/test-docker.yml
+++ b/.github/workflows/test-docker.yml
@@ -29,6 +29,9 @@ jobs:
     steps:
     - uses: actions/checkout@v1
 
+    - name: Build system information
+      run: python .github/workflows/system-info.py
+
     - name: Docker pull
       run: |
         docker pull pythonpillow/${{ matrix.docker }}:${{ matrix.dockerTag }}
diff --git a/.github/workflows/test-windows.yml b/.github/workflows/test-windows.yml
index 00cae9bc2..e0c55bc1a 100644
--- a/.github/workflows/test-windows.yml
+++ b/.github/workflows/test-windows.yml
@@ -70,6 +70,9 @@ jobs:
         python-version: ${{ matrix.python-version }}
         architecture: ${{ matrix.architecture }}
 
+    - name: Build system information
+      run: python .github/workflows/system-info.py
+
     - name: pip install wheel pytest pytest-cov
       run: |
         "%pythonLocation%\python.exe" -m pip install wheel pytest pytest-cov
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 69ed445a6..78307b7a1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -55,6 +55,9 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
+    - name: Build system information
+      run: python .github/workflows/system-info.py
+
     - name: Install Linux dependencies
       if: startsWith(matrix.os, 'ubuntu')
       run: |
diff --git a/CHANGES.rst b/CHANGES.rst
index 5af03f281..c1eab0c2e 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,6 +5,15 @@ Changelog (Pillow)
 7.0.0 (unreleased)
 ------------------
 
+- Better thumbnail aspect ratio preservation #4256
+  [homm]
+
+- Add La mode packing and unpacking #4248
+  [homm]
+
+- Include tests in coverage reports #4173
+  [hugovk]
+
 - Handle broken Photoshop data #4239
   [radarhere]
 
diff --git a/Tests/test_image_thumbnail.py b/Tests/test_image_thumbnail.py
index d1224f075..5806e2a08 100644
--- a/Tests/test_image_thumbnail.py
+++ b/Tests/test_image_thumbnail.py
@@ -5,37 +5,48 @@ from .helper import PillowTestCase, hopper
 
 class TestImageThumbnail(PillowTestCase):
     def test_sanity(self):
-
         im = hopper()
-        im.thumbnail((100, 100))
+        self.assertIsNone(im.thumbnail((100, 100)))
 
-        self.assert_image(im, im.mode, (100, 100))
+        self.assertEqual(im.size, (100, 100))
 
     def test_aspect(self):
-
-        im = hopper()
+        im = Image.new("L", (128, 128))
         im.thumbnail((100, 100))
-        self.assert_image(im, im.mode, (100, 100))
+        self.assertEqual(im.size, (100, 100))
 
-        im = hopper().resize((128, 256))
+        im = Image.new("L", (128, 256))
         im.thumbnail((100, 100))
-        self.assert_image(im, im.mode, (50, 100))
+        self.assertEqual(im.size, (50, 100))
 
-        im = hopper().resize((128, 256))
+        im = Image.new("L", (128, 256))
         im.thumbnail((50, 100))
-        self.assert_image(im, im.mode, (50, 100))
+        self.assertEqual(im.size, (50, 100))
 
-        im = hopper().resize((256, 128))
+        im = Image.new("L", (256, 128))
         im.thumbnail((100, 100))
-        self.assert_image(im, im.mode, (100, 50))
+        self.assertEqual(im.size, (100, 50))
 
-        im = hopper().resize((256, 128))
+        im = Image.new("L", (256, 128))
         im.thumbnail((100, 50))
-        self.assert_image(im, im.mode, (100, 50))
+        self.assertEqual(im.size, (100, 50))
 
-        im = hopper().resize((128, 128))
+        im = Image.new("L", (128, 128))
         im.thumbnail((100, 100))
-        self.assert_image(im, im.mode, (100, 100))
+        self.assertEqual(im.size, (100, 100))
+
+        im = Image.new("L", (256, 162))  # ratio is 1.5802469136
+        im.thumbnail((33, 33))
+        self.assertEqual(im.size, (33, 21))  # ratio is 1.5714285714
+
+        im = Image.new("L", (162, 256))  # ratio is 0.6328125
+        im.thumbnail((33, 33))
+        self.assertEqual(im.size, (21, 33))  # ratio is 0.6363636364
+
+    def test_float(self):
+        im = Image.new("L", (128, 128))
+        im.thumbnail((99.9, 99.9))
+        self.assertEqual(im.size, (100, 100))
 
     def test_no_resize(self):
         # Check that draft() can resize the image to the destination size
@@ -46,4 +57,4 @@ class TestImageThumbnail(PillowTestCase):
         # Test thumbnail(), where only draft() is necessary to resize the image
         with Image.open("Tests/images/hopper.jpg") as im:
             im.thumbnail((64, 64))
-            self.assert_image(im, im.mode, (64, 64))
+            self.assertEqual(im.size, (64, 64))
diff --git a/depends/termux.sh b/depends/termux.sh
index f117790c5..1acc09c44 100755
--- a/depends/termux.sh
+++ b/depends/termux.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
 
-pkg -y install python python-dev ndk-sysroot clang make \
-    libjpeg-turbo-dev 
+pkg install -y python ndk-sysroot clang make \
+    libjpeg-turbo
 
diff --git a/docs/handbook/concepts.rst b/docs/handbook/concepts.rst
index 7e782e743..e4a720a08 100644
--- a/docs/handbook/concepts.rst
+++ b/docs/handbook/concepts.rst
@@ -169,15 +169,15 @@ Filters comparison table
 | Filter     | Downscaling | Upscaling | Performance |
 |            | quality     | quality   |             |
 +============+=============+===========+=============+
-|``NEAREST`` |             |           | ⭐⭐⭐⭐⭐       |
+|``NEAREST`` |             |           | ⭐⭐⭐⭐⭐  |
 +------------+-------------+-----------+-------------+
-|``BOX``     | ⭐           |           | ⭐⭐⭐⭐        |
+|``BOX``     | ⭐          |           | ⭐⭐⭐⭐    |
 +------------+-------------+-----------+-------------+
-|``BILINEAR``| ⭐           | ⭐         | ⭐⭐⭐         |
+|``BILINEAR``| ⭐          | ⭐        | ⭐⭐⭐      |
 +------------+-------------+-----------+-------------+
-|``HAMMING`` | ⭐⭐          |           | ⭐⭐⭐         |
+|``HAMMING`` | ⭐⭐        |           | ⭐⭐⭐      |
 +------------+-------------+-----------+-------------+
-|``BICUBIC`` | ⭐⭐⭐         | ⭐⭐⭐       | ⭐⭐          |
+|``BICUBIC`` | ⭐⭐⭐      | ⭐⭐⭐    | ⭐⭐        |
 +------------+-------------+-----------+-------------+
-|``LANCZOS`` | ⭐⭐⭐⭐        | ⭐⭐⭐⭐      | ⭐           |
+|``LANCZOS`` | ⭐⭐⭐⭐    | ⭐⭐⭐⭐  | ⭐          |
 +------------+-------------+-----------+-------------+
diff --git a/docs/installation.rst b/docs/installation.rst
index 56ab8f0a3..3ec0b7b58 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -15,24 +15,25 @@ Notes
 
 .. note:: Pillow is supported on the following Python versions
 
+
 +-------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
-|**Python**         |**2.4**|**2.5**|**2.6**|**2.7**|**3.2**|**3.3**|**3.4**|**3.5**|**3.6**|**3.7**|**3.8**|
+|**Python**         |**3.8**|**3.7**|**3.6**|**3.5**|**3.4**|**3.3**|**3.2**|**2.7**|**2.6**|**2.5**|**2.4**|
 +-------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
-|Pillow < 2         |  Yes  |  Yes  |  Yes  |  Yes  |       |       |       |       |       |       |       |
+|Pillow >= 7        |  Yes  |  Yes  |  Yes  |  Yes  |       |       |       |       |       |       |       |
 +-------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
-|Pillow 2 - 3       |       |       |  Yes  |  Yes  |  Yes  |  Yes  |  Yes  |  Yes  |       |       |       |
+|Pillow 6.2.1       |  Yes  |  Yes  |  Yes  |  Yes  |       |       |       |  Yes  |       |       |       |
 +-------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
-|Pillow 4           |       |       |       |  Yes  |       |  Yes  |  Yes  |  Yes  |  Yes  |       |       |
+|Pillow 6.0 - 6.2.0 |       |  Yes  |  Yes  |  Yes  |       |       |       |  Yes  |       |       |       |
 +-------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
-|Pillow 5.0 - 5.1   |       |       |       |  Yes  |       |       |  Yes  |  Yes  |  Yes  |       |       |
+|Pillow 5.2 - 5.4   |       |  Yes  |  Yes  |  Yes  |  Yes  |       |       |  Yes  |       |       |       |
 +-------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
-|Pillow 5.2 - 5.4   |       |       |       |  Yes  |       |       |  Yes  |  Yes  |  Yes  |  Yes  |       |
+|Pillow 5.0 - 5.1   |       |       |  Yes  |  Yes  |  Yes  |       |       |  Yes  |       |       |       |
 +-------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
-|Pillow 6.0 - 6.2.0 |       |       |       |  Yes  |       |       |       |  Yes  |  Yes  |  Yes  |       |
+|Pillow 4           |       |       |  Yes  |  Yes  |  Yes  |  Yes  |       |  Yes  |       |       |       |
 +-------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
-|Pillow 6.2.1       |       |       |       |  Yes  |       |       |       |  Yes  |  Yes  |  Yes  |  Yes  |
+|Pillow 2 - 3       |       |       |       |  Yes  |  Yes  |  Yes  |  Yes  |  Yes  |  Yes  |       |       |
 +-------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
-|Pillow >= 7        |       |       |       |       |       |       |       |  Yes  |  Yes  |  Yes  |  Yes  |
+|Pillow < 2         |       |       |       |       |       |       |       |  Yes  |  Yes  |  Yes  |  Yes  |
 +-------------------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-------+
 
 Basic Installation
@@ -190,7 +191,7 @@ Many of Pillow's features require external libraries:
     libraqm.
   * libraqm is dynamically loaded in Pillow 5.0.0 and above, so support
     is available if all the libraries are installed.
-  * Windows support: Raqm support is currently unsupported on Windows.
+  * Windows support: Raqm is not included in prebuilt wheels
 
 Once you have installed the prerequisites, run::
 
@@ -364,8 +365,8 @@ Building on Android
 Basic Android support has been added for compilation within the Termux
 environment. The dependencies can be installed by::
 
-    pkg -y install python python-dev ndk-sysroot clang make \
-        libjpeg-turbo-dev
+    pkg install -y python ndk-sysroot clang make \
+        libjpeg-turbo
 
 This has been tested within the Termux app on ChromeOS, on x86.
 
@@ -413,10 +414,14 @@ These platforms are built and tested for every change.
 +----------------------------------+--------------------------+-----------------------+
 | Ubuntu Linux 16.04 LTS           | 3.5, 3.6, 3.7, 3.8, PyPy3|x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| Windows Server 2012 R2           | 3.5, 3.6, 3.7, 3.8       |x86, x86-64            |
+| Windows Server 2012 R2           | 3.5, 3.8                 |x86, x86-64            |
 |                                  +--------------------------+-----------------------+
 |                                  | PyPy3, 3.7/MinGW         |x86                    |
 +----------------------------------+--------------------------+-----------------------+
+| Windows Server 2019              | 3.5, 3.6, 3.7, 3.8       |x86, x86-64            |
+|                                  +--------------------------+-----------------------+
+|                                  | PyPy3                    |x86                    |
++----------------------------------+--------------------------+-----------------------+
 
 
 Other Platforms
diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index 96ec314bc..981c8c818 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -2137,11 +2137,11 @@ class Image:
         # preserve aspect ratio
         x, y = self.size
         if x > size[0]:
-            y = int(max(y * size[0] / x, 1))
-            x = int(size[0])
+            y = max(round(y * size[0] / x), 1)
+            x = round(size[0])
         if y > size[1]:
-            x = int(max(x * size[1] / y, 1))
-            y = int(size[1])
+            x = max(round(x * size[1] / y), 1)
+            y = round(size[1])
         size = x, y
 
         if size == self.size: