diff --git a/.github/.cspell/project-dictionary.txt b/.github/.cspell/project-dictionary.txt
index e1aa6e6..1a0cb79 100644
--- a/.github/.cspell/project-dictionary.txt
+++ b/.github/.cspell/project-dictionary.txt
@@ -1,3 +1,5 @@
+almalinux
+archlinux
 distro
 doas
 endgroup
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5c40143..60381b6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -58,3 +58,35 @@ jobs:
       - uses: taiki-e/install-action@shfmt
       - run: git ls-files
       - run: ./tools/tidy.sh
+
+  test-container:
+    strategy:
+      fail-fast: false
+      matrix:
+        container:
+          - ubuntu:18.04 # glibc 2.27
+          - ubuntu:20.04 # glibc 2.31
+          - ubuntu:22.04 # glibc 2.35
+          - debian:10-slim # glibc 2.28
+          - debian:11-slim # glibc 2.31
+          - debian:12-slim # glibc 2.36
+          - fedora:latest # glibc 2.38 (as of fedora 39)
+          - almalinux:8 # glibc 2.28
+          - almalinux:8-minimal # glibc 2.28
+          - almalinux:9 # glibc 2.34
+          - almalinux:9-minimal # glibc 2.34
+          - centos:7 # glibc 2.17
+          - opensuse/leap:latest # glibc 2.31 (as of leap 15.5)
+          - opensuse/tumbleweed:latest # glibc 2.39 (as of 2024-04-18)
+          - archlinux:latest # glibc 2.38 (as of 2024-04-18)
+          - alpine:latest # musl 1.2.4 (as of alpine 3.19)
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    container: ${{ matrix.container }}
+    steps:
+      - name: Install requirements (alpine)
+        run: apk --no-cache add bash
+        shell: sh
+        if: startsWith(matrix.container, 'alpine')
+      - uses: taiki-e/checkout-action@main
+      - run: git ls-files
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 36b4bb5..379e3fe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,7 +10,7 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
-- Improve support for Arch Linux based containers/self-hosted runners.
+- Improve support for SUSE/Arch based containers/self-hosted runners.
 
 ## [1.0.0] - 2024-03-08
 
diff --git a/README.md b/README.md
index 445e862..43b975c 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@ GitHub Action for checking out a repository. (Simplified `actions/checkout` alte
 
 - [Usage](#usage)
 - [Why not actions/checkout?](#why-not-actionscheckout)
+- [Compatibility](#compatibility)
 - [Related Projects](#related-projects)
 - [License](#license)
 
@@ -34,6 +35,13 @@ As of 2024-03-08, the latest version of `actions/checkout` that uses node20 [doe
 
 Also, in `actions/*` actions, each update of the Node.js used increments the major version (it is the correct behavior for compatibility although), so workflows that use it require maintenance on a regular basis. (Unless you have fully automated dependency updates.)
 
+## Compatibility
+
+This action has been tested for GitHub-hosted runners (Ubuntu, macOS, Windows) and containers (Ubuntu, Debian, Alpine, Fedora, CentOS, Alma, openSUSE, Arch).
+To use this action in self-hosted runners or in containers, at least the following tools are required:
+
+- bash
+
 ## Related Projects
 
 - [install-action]: GitHub Action for installing development tools (mainly from GitHub Releases).
diff --git a/main.sh b/main.sh
index 01f102e..befaeb5 100755
--- a/main.sh
+++ b/main.sh
@@ -53,6 +53,9 @@ apk_install() {
         apk --no-cache add "$@"
     fi
 }
+zypper_install() {
+    retry _sudo zypper install -y "$@"
+}
 pacman_install() {
     retry _sudo pacman -Sy --noconfirm "$@"
 }
@@ -61,6 +64,7 @@ sys_install() {
         debian) apt_install "$@" ;;
         fedora) dnf_install "$@" ;;
         alpine) apk_install "$@" ;;
+        suse) zypper_install "$@" ;;
         arch) pacman_install "$@" ;;
     esac
 }
@@ -73,11 +77,12 @@ case "$(uname -s)" in
         host_os=linux
         if grep -q '^ID_LIKE=' /etc/os-release; then
             base_distro=$(grep '^ID_LIKE=' /etc/os-release | sed 's/^ID_LIKE=//')
-            case " ${base_distro} " in
-                *' debian '*) base_distro=debian ;;
-                *' fedora '*) base_distro=fedora ;;
-                *' alpine '*) base_distro=alpine ;;
-                *' arch '*) base_distro=arch ;;
+            case "${base_distro}" in
+                *debian*) base_distro=debian ;;
+                *fedora*) base_distro=fedora ;;
+                *alpine*) base_distro=alpine ;;
+                *suse*) base_distro=suse ;;
+                *arch*) base_distro=arch ;;
             esac
         else
             base_distro=$(grep '^ID=' /etc/os-release | sed 's/^ID=//')
@@ -109,7 +114,7 @@ if ! type -P git &>/dev/null; then
     case "${host_os}" in
         linux*)
             case "${base_distro}" in
-                debian | fedora | alpine | arch)
+                debian | fedora | alpine | suse | arch)
                     echo "::group::Install packages required for installation (git)"
                     case "${base_distro}" in
                         debian) sys_install ca-certificates git ;;
@@ -117,7 +122,7 @@ if ! type -P git &>/dev/null; then
                     esac
                     echo "::endgroup::"
                     ;;
-                *) warn "checkout-action requires git on non-Debian/Fedora/Alpine/Arch-based Linux" ;;
+                *) warn "checkout-action requires git on non-Debian/Fedora/Alpine/SUSE/Arch-based Linux" ;;
             esac
             ;;
         macos) warn "checkout-action requires git on macOS" ;;