diff --git a/utils/tests/gitlab-ci-alpine.yml b/utils/tests/gitlab-ci-alpine.yml
index 6d77b42ac..7fb14aa77 100644
--- a/utils/tests/gitlab-ci-alpine.yml
+++ b/utils/tests/gitlab-ci-alpine.yml
@@ -11,6 +11,7 @@
     - if: $RELEASE == "weekly"
     - if: $ALPINE == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   before_script:
     - apk update
     - apk upgrade
@@ -28,6 +29,7 @@ weekly-alpine:
     - if: $ALPINE == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
       when: manual
+      allow_failure: true
   stage: pre-build
   script:
     - echo "Starting Alpine jobs"
@@ -51,4 +53,3 @@ weekly-alpine-latest-default-test:
       - $CCACHE_BASEDIR_VALUE/
   variables:
     MODE: default
-
diff --git a/utils/tests/gitlab-ci-clang.yml b/utils/tests/gitlab-ci-clang.yml
index ddb29fb6b..686f58f06 100644
--- a/utils/tests/gitlab-ci-clang.yml
+++ b/utils/tests/gitlab-ci-clang.yml
@@ -15,6 +15,7 @@
     - if: $RELEASE == "weekly"
     - if: $CLANG_BUILD_ENABLE == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   before_script:
     - apt update
     - apt upgrade -y
@@ -38,6 +39,7 @@
     - if: $RELEASE == "weekly"
     - if: $CLANG_BUILD_ENABLE == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   before_script:
     - apt update
     - apt upgrade -y
@@ -60,6 +62,7 @@ weekly-clang:
     - if: $CLANG_BUILD_ENABLE == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
       when: manual
+      allow_failure: true
   stage: pre-build
   script:
     - echo "Starting clang jobs"
diff --git a/utils/tests/gitlab-ci-daily.yml b/utils/tests/gitlab-ci-daily.yml
index cdb1c4db6..56eed0f24 100644
--- a/utils/tests/gitlab-ci-daily.yml
+++ b/utils/tests/gitlab-ci-daily.yml
@@ -43,6 +43,7 @@ daily-jobs:
     - if: $RELEASE == "daily"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
       when: manual
+      allow_failure: true
   stage: pre-build
   script:
     - echo "Starting daily jobs"
@@ -52,6 +53,7 @@ weekly-slow-jobs:
     - if: $RELEASE == "weekly"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
       when: manual
+      allow_failure: true
   stage: pre-build
   script:
     - echo "Starting weekly jobs"
@@ -62,6 +64,7 @@ daily-build-test-debug:
   rules:
     - if: $RELEASE == "daily"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   needs: ["daily-jobs"]
   stage: build
   variables:
@@ -76,6 +79,7 @@ daily-build-default:
   rules:
     - if: $RELEASE == "daily"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   needs: ["daily-jobs"]
   stage: build
   variables:
@@ -86,6 +90,7 @@ daily-test-default:
   rules:
     - if: $RELEASE == "daily"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   needs: ["daily-build-default"]
   stage: test
   cache:
@@ -101,6 +106,7 @@ daily-build-optimized:
   rules:
     - if: $RELEASE == "daily"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   needs: ["daily-jobs"]
   stage: build
   variables:
@@ -111,6 +117,7 @@ daily-test-optimized:
   rules:
     - if: $RELEASE == "daily"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   needs: ["daily-build-optimized"]
   stage: test
   cache:
@@ -127,6 +134,7 @@ daily-build-test-optimized-valgrind:
   rules:
     - if: $RELEASE == "daily"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   needs: ["daily-jobs"]
   stage: build
   variables:
@@ -142,6 +150,7 @@ weekly-build-test-debug-valgrind:
   rules:
     - if: $RELEASE == "weekly"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   needs: ["weekly-slow-jobs"]
   stage: build
   variables:
@@ -157,6 +166,7 @@ weekly-build-test-default-valgrind:
   rules:
     - if: $RELEASE == "weekly"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   needs: ["weekly-slow-jobs"]
   stage: build
   variables:
@@ -172,6 +182,7 @@ weekly-build-test-optimized-valgrind:
   rules:
     - if: $RELEASE == "weekly"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   needs: ["weekly-slow-jobs"]
   stage: build
   variables:
@@ -187,6 +198,7 @@ weekly-build-test-takes-forever-optimized:
   rules:
     - if: $RELEASE == "weekly"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   needs: ["weekly-slow-jobs"]
   stage: build
   variables:
diff --git a/utils/tests/gitlab-ci-fedora.yml b/utils/tests/gitlab-ci-fedora.yml
index 631399ab8..8f202fd0b 100644
--- a/utils/tests/gitlab-ci-fedora.yml
+++ b/utils/tests/gitlab-ci-fedora.yml
@@ -13,6 +13,7 @@
     - if: $RELEASE == "weekly"
     - if: $FEDORA == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   before_script:
     - dnf update --assumeyes
     - dnf install --assumeyes
@@ -39,11 +40,11 @@ weekly-fedora:
     - if: $FEDORA == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
       when: manual
+      allow_failure: true
   stage: pre-build
   script:
     - echo "Starting Fedora jobs"
 
-
 # Fedora 36
 weekly-build-fedora-36-debug:
   extends: .weekly-build-fedora
@@ -94,7 +95,6 @@ weekly-test-fedora-36-optimized:
   variables:
     MODE: optimized
 
-
 # Fedora 37
 weekly-build-fedora-37-debug:
   extends: .weekly-build-fedora
diff --git a/utils/tests/gitlab-ci-gcc.yml b/utils/tests/gitlab-ci-gcc.yml
index 9114dcf30..e441e2ce7 100644
--- a/utils/tests/gitlab-ci-gcc.yml
+++ b/utils/tests/gitlab-ci-gcc.yml
@@ -13,6 +13,7 @@
     - if: $RELEASE == "weekly"
     - if: $UBUNTU == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   before_script:
     - apt update
     - apt upgrade -y
@@ -38,6 +39,7 @@ weekly-gcc:
     - if: $UBUNTU == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
       when: manual
+      allow_failure: true
   stage: pre-build
   script:
     - echo "Starting GCC jobs"
diff --git a/utils/tests/gitlab-ci-ubuntu.yml b/utils/tests/gitlab-ci-ubuntu.yml
index 6bbe6ba89..5fbba3a19 100644
--- a/utils/tests/gitlab-ci-ubuntu.yml
+++ b/utils/tests/gitlab-ci-ubuntu.yml
@@ -13,6 +13,7 @@
     - if: $RELEASE == "weekly"
     - if: $UBUNTU == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
+      allow_failure: true
   before_script:
     # The following ppa is needed only for Ubuntu 18.04 to install g++9
     - apt update
@@ -40,6 +41,7 @@ weekly-ubuntu:
     - if: $UBUNTU == "True"
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
       when: manual
+      allow_failure: true
   stage: pre-build
   script:
     - echo "Starting Ubuntu jobs"
diff --git a/utils/tests/gitlab-ci.yml b/utils/tests/gitlab-ci.yml
index 4575a927c..14ce632aa 100644
--- a/utils/tests/gitlab-ci.yml
+++ b/utils/tests/gitlab-ci.yml
@@ -24,6 +24,13 @@ stages:
   - code-linting
   - documentation
 
+workflow:
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
+    - if: $CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS
+      when: never
+    - if: $CI_COMMIT_BRANCH
+
 ###################### BUILD STAGE #############################################
 
 # Defines the steps to run the tests
@@ -66,7 +73,6 @@ stages:
   variables:
     CCACHE_BASEDIR_VALUE: ns-3-ccache-storage
 
-
 # Weekly jobs for other distribution and compilers
 include:
   - "utils/tests/gitlab-ci-per-commit.yml"