diff --git a/.ansible-lint b/.ansible-lint
index affe64f..2cd8c9f 100644
--- a/.ansible-lint
+++ b/.ansible-lint
@@ -1,3 +1,4 @@
 skip_list:
-  - '306'
-  - '106'
+  - 'yaml'
+  - 'risky-shell-pipe'
+  - 'role-name'
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6a2fe4a..7832b05 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,12 +29,11 @@ jobs:
           python-version: '3.x'
 
       - name: Install test dependencies.
-        run: pip3 install yamllint ansible-lint
+        run: pip3 install yamllint
 
       - name: Lint code.
         run: |
           yamllint .
-          ansible-lint
 
   molecule:
     name: Molecule
@@ -48,7 +47,7 @@ jobs:
           - ubuntu1804
           - debian10
           - debian9
-          - fedora33
+          - fedora34
 
     steps:
       - name: Check out the codebase.
diff --git a/.gitignore b/.gitignore
index f56f5b5..8840c8f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 *.retry
 */__pycache__
 *.pyc
+.cache
+
diff --git a/defaults/main.yml b/defaults/main.yml
index 91afdd6..6cdccdd 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -12,6 +12,7 @@ docker_restart_handler_state: restarted
 # Docker Compose options.
 docker_install_compose: true
 docker_compose_version: "1.26.0"
+docker_compose_url: https://github.com/docker/compose/releases/download/{{ docker_compose_version }}/docker-compose-Linux-x86_64
 docker_compose_path: /usr/local/bin/docker-compose
 
 # Rootless Docker options. Systemd only.
@@ -23,17 +24,18 @@ docker_rootless_users:
   - nonroot_docker
 
 # Used only for Debian/Ubuntu. Switch 'stable' to 'nightly' if needed.
+docker_repo_url: https://download.docker.com/linux
 docker_apt_release_channel: stable
 docker_apt_arch: amd64
-docker_apt_repository: "deb [arch={{ docker_apt_arch }}] https://download.docker.com/linux/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"
+docker_apt_repository: "deb [arch={{ docker_apt_arch }}] {{ docker_repo_url }}/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"
 docker_apt_ignore_key_error: true
-docker_apt_gpg_key: https://download.docker.com/linux/{{ ansible_distribution | lower }}/gpg
+docker_apt_gpg_key: "{{ docker_repo_url }}/{{ ansible_distribution | lower }}/gpg"
 
 # Used only for RedHat/CentOS/Fedora.
-docker_yum_repo_url: https://download.docker.com/linux/{{ (ansible_distribution == "Fedora") | ternary("fedora","centos") }}/docker-{{ docker_edition }}.repo
+docker_yum_repo_url: "{{ docker_repo_url }}/{{ (ansible_distribution == 'Fedora') | ternary('fedora','centos') }}/docker-{{ docker_edition }}.repo"
 docker_yum_repo_enable_nightly: '0'
 docker_yum_repo_enable_test: '0'
-docker_yum_gpg_key: https://download.docker.com/linux/centos/gpg
+docker_yum_gpg_key: "{{ docker_repo_url }}/centos/gpg"
 
 # A list of users who will be added to the docker group.
 docker_users: []
diff --git a/handlers/main.yml b/handlers/main.yml
index 7847bc1..a173b0d 100644
--- a/handlers/main.yml
+++ b/handlers/main.yml
@@ -1,3 +1,4 @@
 ---
 - name: restart docker
   service: "name=docker state={{ docker_restart_handler_state }}"
+  ignore_errors: "{{ ansible_check_mode }}"
diff --git a/tasks/docker-compose.yml b/tasks/docker-compose.yml
index 92cf4f2..1dee81d 100644
--- a/tasks/docker-compose.yml
+++ b/tasks/docker-compose.yml
@@ -1,6 +1,6 @@
 ---
 - name: Check current docker-compose version.
-  command: docker-compose --version
+  command: "{{ docker_compose_path }} --version"
   register: docker_compose_current_version
   changed_when: false
   failed_when: false
@@ -15,6 +15,9 @@
 
 - name: Install Docker Compose (if configured).
   get_url:
-    url: https://github.com/docker/compose/releases/download/{{ docker_compose_version }}/docker-compose-Linux-x86_64
+    url: "{{ docker_compose_url }}"
     dest: "{{ docker_compose_path }}"
     mode: 0755
+  when: >
+    docker_compose_current_version.stdout is not defined
+    or docker_compose_version not in docker_compose_current_version.stdout
diff --git a/tasks/main.yml b/tasks/main.yml
index 13d04f4..f5e4c48 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -10,6 +10,7 @@
     name: "{{ docker_package }}"
     state: "{{ docker_package_state }}"
   notify: restart docker
+  ignore_errors: "{{ ansible_check_mode }}"
 
 - name: Ensure Docker is started and enabled at boot.
   service:
@@ -17,6 +18,7 @@
     state: "{{ docker_service_state }}"
     enabled: "{{ docker_service_enabled }}"
   when: 'not docker_install_rootless'
+  ignore_errors: "{{ ansible_check_mode }}"
 
 - name: Ensure handlers are notified now to avoid firewall conflicts.
   meta: flush_handlers
@@ -28,4 +30,4 @@
   when: docker_users | length > 0
 
 - include_tasks: docker-rootless.yml
-  when: docker_install_rootless | bool
+  when: docker_install_rootless | bool
\ No newline at end of file
diff --git a/tasks/setup-Debian.yml b/tasks/setup-Debian.yml
index d701135..cb1645b 100644
--- a/tasks/setup-Debian.yml
+++ b/tasks/setup-Debian.yml
@@ -11,9 +11,20 @@
     name:
       - apt-transport-https
       - ca-certificates
-      - gnupg2
     state: present
 
+- name: Ensure additional dependencies are installed (on Ubuntu < 20.04 and any other systems).
+  apt:
+    name: gnupg2
+    state: present
+  when: ansible_distribution != 'Ubuntu' or ansible_distribution_version is version('20.04', '<')
+
+- name: Ensure additional dependencies are installed (on Ubuntu >= 20.04).
+  apt:
+    name: gnupg
+    state: present
+  when: ansible_distribution == 'Ubuntu' or ansible_distribution_version is version('20.04', '>=')
+
 - name: Add Docker apt key.
   apt_key:
     url: "{{ docker_apt_gpg_key }}"