diff --git a/.github/workflows/distro-matrix.yml b/.github/workflows/distro-matrix.yml
index 6c1b98d..987d991 100644
--- a/.github/workflows/distro-matrix.yml
+++ b/.github/workflows/distro-matrix.yml
@@ -37,8 +37,6 @@ jobs:
             image: ubuntu:22.04
           - name: ubuntu-24.04
             image: ubuntu:24.04
-          - name: debian-11
-            image: debian:11
           - name: debian-12
             image: debian:12
 
@@ -116,7 +114,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          dnf install -y \
+          dnf install -y --allowerasing \
             bash iproute iputils bind-utils curl sudo procps-ng ca-certificates
 
       - name: Setup scripts
@@ -275,13 +273,18 @@ jobs:
       image: ${{ matrix.distro.image }}
 
     steps:
+      # actions/checkout unpacks the repository with tar, which these images lack.
+      - name: Install tar for checkout
+        run: zypper --non-interactive install tar gzip
+
       - name: Checkout
         uses: actions/checkout@v7.0.1
 
       - name: Install dependencies
         run: |
           zypper --non-interactive install \
-            bash iproute2 iputils bind-utils curl sudo procps ca-certificates
+            bash iproute2 iputils bind-utils curl sudo procps ca-certificates \
+            findutils grep sed gawk coreutils hostname
 
       - name: Setup scripts
         run: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 98402bb..bb267d2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -70,7 +70,6 @@ jobs:
           - ubuntu:20.04
           - ubuntu:22.04
           - ubuntu:24.04
-          - debian:11
           - debian:12
 
     container:
diff --git a/tests/distro-matrix.json b/tests/distro-matrix.json
index e971aba..7bc40ca 100644
--- a/tests/distro-matrix.json
+++ b/tests/distro-matrix.json
@@ -23,13 +23,6 @@
         "network_manager": "NetworkManager",
         "init": "systemd"
       },
-      {
-        "name": "debian-11",
-        "image": "debian:11",
-        "package_manager": "apt",
-        "network_manager": "ifupdown",
-        "init": "systemd"
-      },
       {
         "name": "debian-12",
         "image": "debian:12",
diff --git a/tests/run-container-tests.sh b/tests/run-container-tests.sh
index 6a56ad9..7fdc1d9 100644
--- a/tests/run-container-tests.sh
+++ b/tests/run-container-tests.sh
@@ -40,7 +40,6 @@ declare -A DISTROS=(
     ["ubuntu-20.04"]="ubuntu:20.04"
     ["ubuntu-22.04"]="ubuntu:22.04"
     ["ubuntu-24.04"]="ubuntu:24.04"
-    ["debian-11"]="debian:11"
     ["debian-12"]="debian:12"
     # RHEL family
     ["fedora-39"]="fedora:39"
@@ -73,7 +72,7 @@ get_install_cmd() {
             echo "apt-get update && apt-get install -y bash iproute2 iputils-ping dnsutils curl sudo procps"
             ;;
         fedora:*|rockylinux:*|almalinux:*)
-            echo "dnf install -y bash iproute iputils bind-utils curl sudo procps-ng"
+            echo "dnf install -y --allowerasing bash iproute iputils bind-utils curl sudo procps-ng"
             ;;
         archlinux:*)
             echo "pacman -Syu --noconfirm && pacman -S --noconfirm bash iproute2 iputils bind curl sudo procps-ng"
@@ -82,7 +81,7 @@ get_install_cmd() {
             echo "apk add --no-cache bash iproute2 iputils bind-tools curl sudo procps coreutils"
             ;;
         opensuse/*:*)
-            echo "zypper --non-interactive install bash iproute2 iputils bind-utils curl sudo procps"
+            echo "zypper --non-interactive install bash iproute2 iputils bind-utils curl sudo procps findutils grep sed gawk coreutils hostname"
             ;;
         *)
             echo "echo 'Unknown distro'"