diff --git a/.github/workflows/daily.yaml b/.github/workflows/daily.yaml
index 6f4168a..77c4860 100644
--- a/.github/workflows/daily.yaml
+++ b/.github/workflows/daily.yaml
@@ -11,6 +11,9 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        keycloak-version: ["20.0", "21.0", "latest"]
+    env:
+      KEYCLOAK_DOCKER_IMAGE_TAG: ${{ matrix.keycloak-version }}
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
index 9f3458c..2891782 100644
--- a/.github/workflows/lint.yaml
+++ b/.github/workflows/lint.yaml
@@ -56,9 +56,12 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        keycloak-version: ["20.0", "21.0", "latest"]
     needs:
       - check-commits
       - check-linting
+    env:
+      KEYCLOAK_DOCKER_IMAGE_TAG: ${{ matrix.keycloak-version }}
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
diff --git a/test_keycloak_init.sh b/test_keycloak_init.sh
index 7f4abc5..623b7d2 100755
--- a/test_keycloak_init.sh
+++ b/test_keycloak_init.sh
@@ -1,7 +1,8 @@
 #!/usr/bin/env bash
 
 CMD_ARGS=$1
-KEYCLOAK_DOCKER_IMAGE="quay.io/keycloak/keycloak:latest"
+KEYCLOAK_DOCKER_IMAGE_TAG="${KEYCLOAK_DOCKER_IMAGE_TAG:-latest}"
+KEYCLOAK_DOCKER_IMAGE="quay.io/keycloak/keycloak:$KEYCLOAK_DOCKER_IMAGE_TAG"
 
 function keycloak_stop() {
     if [ "$(docker ps -q -f name=unittest_keycloak)" ]; then
diff --git a/tox.ini b/tox.ini
index 82df028..1f9619d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -29,7 +29,7 @@ commands =
 
 [testenv:tests]
 setenv = file|tox.env
-passenv = CONTAINER_HOST
+passenv = CONTAINER_HOST KEYCLOAK_DOCKER_IMAGE_TAG
 commands =
     ./test_keycloak_init.sh "pytest -vv --cov=keycloak --cov-report term-missing {posargs}"