diff --git a/.github/workflows/test-docker.yml b/.github/workflows/test-docker.yml
index 490af5e4b..46e9e5f2c 100644
--- a/.github/workflows/test-docker.yml
+++ b/.github/workflows/test-docker.yml
@@ -18,8 +18,12 @@ jobs:
           alpine,
           amazon-2-amd64,
           arch,
+          centos-7-amd64,
+          centos-8-amd64,
+          centos-stream-8-amd64,
           debian-10-buster-x86,
           fedora-34-amd64,
+          ubuntu-18.04-bionic-amd64,
           ubuntu-20.04-focal-amd64,
         ]
         dockerTag: [main]
diff --git a/docs/installation.rst b/docs/installation.rst
index c19bb2dd1..88aa4eecd 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -454,12 +454,20 @@ These platforms are built and tested for every change.
 +----------------------------------+----------------------------+---------------------+
 | Arch                             | 3.9                        | x86-64              |
 +----------------------------------+----------------------------+---------------------+
+| CentOS 7                         | 3.9                        | x86-64              |
++----------------------------------+----------------------------+---------------------+
+| CentOS 8                         | 3.9                        | x86-64              |
++----------------------------------+----------------------------+---------------------+
+| CentOS Stream 8                  | 3.9                        | x86-64              |
++----------------------------------+----------------------------+---------------------+
 | Debian 10 Buster                 | 3.7                        | x86                 |
 +----------------------------------+----------------------------+---------------------+
 | Fedora 34                        | 3.9                        | x86-64              |
 +----------------------------------+----------------------------+---------------------+
 | macOS 10.15 Catalina             | 3.7, 3.8, 3.9, 3.10, PyPy3 | x86-64              |
 +----------------------------------+----------------------------+---------------------+
+| Ubuntu Linux 18.04 LTS (Bionic)  | 3.9                        | x86-64              |
++----------------------------------+----------------------------+---------------------+
 | Ubuntu Linux 20.04 LTS (Focal)   | 3.7, 3.8, 3.9, 3.10, PyPy3 | x86-64              |
 |                                  +----------------------------+---------------------+
 |                                  | 3.8                        | arm64v8, ppc64le,   |