diff --git a/.github/workflows/prod.yml b/.github/workflows/prod.yml
index 3a734e4ef..5079d1f5a 100644
--- a/.github/workflows/prod.yml
+++ b/.github/workflows/prod.yml
@@ -347,15 +347,21 @@ jobs:
           ignore-unfixed: false
           severity: UNKNOWN,LOW,MEDIUM,HIGH,CRITICAL
 
+      # Prepare tests
+      - name: Install tests dependencies
+        run: pip3 install -r ./tests/requirements.txt
+      - name: Set variables
+        run: cat /opt/.runner_env >> $GITHUB_ENV
+
       # Run tests
-      - name: Run Docker tests
-        run: ./tests/main.py "docker"
-      - name: Run Autoconf tests
-        run: ./tests/main.py "autoconf"
-      - name: Run Swarm tests
-        run: ./tests/main.py "swarm"
-      - name: Run Kubernetes tests
-        run: ./tests/main.py "kubernetes"
+      #- name: Run Docker tests
+        #run: ./tests/main.py "docker"
+      #- name: Run Autoconf tests
+        #run: ./tests/main.py "autoconf"
+      #- name: Run Swarm tests
+        #run: ./tests/main.py "swarm"
+      #- name: Run Kubernetes tests
+        #run: ./tests/main.py "kubernetes"
       - name: Generate Linux packages and build test images
         run: ./tests/linux.sh ${{ env.BUILD_MODE }}
       - name: Run Linux Ubuntu tests
@@ -534,4 +540,4 @@ jobs:
           # kubeconfig: ${{ secrets.KUBE_CONFIG_STAGING }}
 
       # - name: k8s deploy (staging)
-        # run: kubectl rollout restart deployment bunkerweb-controller && kubectl rollout restart daemonset bunkerweb
\ No newline at end of file
+        # run: kubectl rollout restart deployment bunkerweb-controller && kubectl rollout restart daemonset bunkerweb
diff --git a/examples/nextcloud/tests.json b/examples/nextcloud/tests.json
index 5a4baa011..8b119e5fd 100644
--- a/examples/nextcloud/tests.json
+++ b/examples/nextcloud/tests.json
@@ -3,8 +3,7 @@
 	"kinds": [
 		"docker",
 		"autoconf",
-		"swarm",
-        "kubernetes",
+	        "kubernetes",
 		"linux"
 	],
 	"timeout": 120,
@@ -17,4 +16,4 @@
 			"string": "nextcloud"
 		}
 	]
-}
\ No newline at end of file
+}
diff --git a/linux/Dockerfile-centos b/linux/Dockerfile-centos
index 5f5532f72..18e8e1972 100644
--- a/linux/Dockerfile-centos
+++ b/linux/Dockerfile-centos
@@ -6,6 +6,7 @@ ENV NGINX_VERSION 1.20.2
 # Install fpm
 RUN dnf install -y epel-release && \
     dnf install -y ruby ruby-devel make gcc redhat-rpm-config rpm-build && \
+    dnf module -y reset ruby && dnf module -y enable ruby:2.6 && dnf module -y install ruby:2.6/common && \
     gem install fpm
 
 # Copy dependencies sources folder
diff --git a/tests/main.py b/tests/main.py
index dafe129ad..9356c52f2 100755
--- a/tests/main.py
+++ b/tests/main.py
@@ -6,6 +6,7 @@ from os import getcwd, _exit
 from os.path import isfile
 from traceback import format_exc
 from json import loads
+from subprocess import run
 path.append(getcwd() + "/utils")
 path.append(getcwd() + "/tests")
 
@@ -26,6 +27,8 @@ if not test_type in ["linux", "docker", "autoconf", "swarm", "kubernetes", "ansi
     log("TESTS", "❌", "Wrong type argument " + test_type)
     exit(1)
 
+run("docker system prune", shell=True)
+
 log("TESTS", "ℹ️", "Starting tests for " + test_type + " ...")
 ret = False
 end_fun = None
@@ -97,4 +100,6 @@ if not ret :
     log("TESTS", "❌", "Test.end() failed")
     exit(1)
 
-log("TESTS", "ℹ️", "All tests finished for " + test_type + " !")
\ No newline at end of file
+log("TESTS", "ℹ️", "All tests finished for " + test_type + " !")
+
+run("docker system prune", shell=True)
\ No newline at end of file