diff --git a/.github/workflows/test-docker.yml b/.github/workflows/test-docker.yml
index f168304bc..9025dec1c 100644
--- a/.github/workflows/test-docker.yml
+++ b/.github/workflows/test-docker.yml
@@ -12,10 +12,8 @@ jobs:
         docker: [
           alpine,
           arch,
-          ubuntu-16.04-xenial-amd64,
           ubuntu-18.04-bionic-amd64,
           ubuntu-20.04-focal-amd64,
-          debian-9-stretch-x86,
           debian-10-buster-x86,
           centos-6-amd64,
           centos-7-amd64,
diff --git a/docs/installation.rst b/docs/installation.rst
index c35b98f48..9a50951ca 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -395,8 +395,6 @@ These platforms are built and tested for every change.
 +----------------------------------+--------------------------+-----------------------+
 | CentOS 8                         | 3.6                      |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| Debian 9 Stretch                 | 3.5                      |x86                    |
-+----------------------------------+--------------------------+-----------------------+
 | Debian 10 Buster                 | 3.7                      |x86                    |
 +----------------------------------+--------------------------+-----------------------+
 | Fedora 31                        | 3.7                      |x86-64                 |
@@ -405,11 +403,11 @@ These platforms are built and tested for every change.
 +----------------------------------+--------------------------+-----------------------+
 | macOS 10.15 Catalina             | 3.6, 3.7, 3.8, PyPy3     |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| Ubuntu Linux 16.04 LTS           | 3.5, 3.6, 3.7, 3.8, PyPy3|x86-64                 |
+| Ubuntu Linux 16.04 LTS (Xenial)  | 3.6, 3.7, 3.8, PyPy3     |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| Ubuntu Linux 18.04 LTS           | 3.6                      |x86-64                 |
+| Ubuntu Linux 18.04 LTS (Bionic)  | 3.6                      |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| Ubuntu Linux 20.04 LTS           | 3.8                      |x86-64                 |
+| Ubuntu Linux 20.04 LTS (Focal)   | 3.8                      |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
 | Windows Server 2016              | 3.8                      |x86                    |
 |                                  +--------------------------+-----------------------+
@@ -460,14 +458,14 @@ These platforms have been reported to work at the versions mentioned.
 +----------------------------------+------------------------------+--------------------------------+-----------------------+
 | Fedora 23                        | 2.7, 3.4                     | 3.1.0                          |x86-64                 |
 +----------------------------------+------------------------------+--------------------------------+-----------------------+
-| Ubuntu Linux 12.04 LTS           | 2.6, 3.2, 3.3, 3.4, 3.5      | 3.4.1                          |x86,x86-64             |
+| Ubuntu Linux 12.04 LTS (Precise) | 2.6, 3.2, 3.3, 3.4, 3.5      | 3.4.1                          |x86,x86-64             |
 |                                  | PyPy5.3.1, PyPy3 v2.4.0      |                                |                       |
 |                                  +------------------------------+--------------------------------+-----------------------+
 |                                  | 2.7                          | 4.3.0                          |x86-64                 |
 |                                  +------------------------------+--------------------------------+-----------------------+
 |                                  | 2.7, 3.2                     | 3.4.1                          |ppc                    |
 +----------------------------------+------------------------------+--------------------------------+-----------------------+
-| Ubuntu Linux 10.04 LTS           | 2.6                          | 2.3.0                          |x86,x86-64             |
+| Ubuntu Linux 10.04 LTS (Lucid)   | 2.6                          | 2.3.0                          |x86,x86-64             |
 +----------------------------------+------------------------------+--------------------------------+-----------------------+
 | Debian 8.2 Jessie                | 2.7, 3.4                     | 3.1.0                          |x86-64                 |
 +----------------------------------+------------------------------+--------------------------------+-----------------------+