diff --git a/utils/tests/gitlab-ci-ubuntu.yml b/utils/tests/gitlab-ci-ubuntu.yml
index 0cdbd42b3..cbf68c720 100644
--- a/utils/tests/gitlab-ci-ubuntu.yml
+++ b/utils/tests/gitlab-ci-ubuntu.yml
@@ -16,39 +16,18 @@
   before_script:
     - apt-get --quiet update --yes
     - DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata
-#    - apt-get --quiet install gcc g++ python python3 python-dev qt5-default openmpi-bin openmpi-common openmpi-doc libopenmpi-dev gsl-bin libgsl-dev ccache flex bison libfl-dev sqlite sqlite3 libsqlite3-dev libxml2 libxml2-dev libgtk-3-dev libboost-all-dev $LIBGSL --yes
     - apt-get --quiet install gcc g++ python python3 python-dev qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools openmpi-bin openmpi-common openmpi-doc libopenmpi-dev gsl-bin libgsl-dev ccache flex bison libfl-dev sqlite3 libsqlite3-dev libxml2 libxml2-dev libgtk-3-dev libboost-all-dev $LIBGSL --yes
   variables:
     COMPILER: g++
 
-# # Ubuntu 16.04 (Until April 2021)
-# weekly-build-ubuntu-16.04-debug:
-#   extends: .weekly-build-ubuntu
-#   image: ubuntu:16.04
-#   variables:
-#     MODE: debug
-#     LIBGSL: libgsl2
-# 
-# weekly-build-ubuntu-16.04-release:
-#   extends: .weekly-build-ubuntu
-#   image: ubuntu:16.04
-#   variables:
-#     MODE: release
-#     LIBGSL: libgsl2
-# 
-# weekly-build-ubuntu-16.04-optimized:
-#   extends: .weekly-build-ubuntu
-#   image: ubuntu:16.04
-#   variables:
-#     MODE: optimized
-#     LIBGSL: libgsl2
-
 # Ubuntu 18.04 (Until April 2023)
 weekly-build-ubuntu-18.04-debug:
   extends: .weekly-build-ubuntu
   image: ubuntu:18.04
   before_script:
-    - apt-get install gcc-8 g++-8 --yes
+    - apt-get --quiet update --yes
+    - DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata
+    - apt-get --quiet install gcc-8 g++-8 python python3 python-dev qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools openmpi-bin openmpi-common openmpi-doc libopenmpi-dev gsl-bin libgsl-dev ccache flex bison libfl-dev sqlite3 libsqlite3-dev libxml2 libxml2-dev libgtk-3-dev libboost-all-dev $LIBGSL --yes
     - update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 700 --slave /usr/bin/g++ g++ /usr/bin/g++-7
     - update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 800 --slave /usr/bin/g++ g++ /usr/bin/g++-8
   variables:
@@ -59,7 +38,9 @@ weekly-build-ubuntu-18.04-release:
   extends: .weekly-build-ubuntu
   image: ubuntu:18.04
   before_script:
-    - apt-get install gcc-8 g++-8 --yes
+    - apt-get --quiet update --yes
+    - DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata
+    - apt-get --quiet install gcc-8 g++-8 python python3 python-dev qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools openmpi-bin openmpi-common openmpi-doc libopenmpi-dev gsl-bin libgsl-dev ccache flex bison libfl-dev sqlite3 libsqlite3-dev libxml2 libxml2-dev libgtk-3-dev libboost-all-dev $LIBGSL --yes
     - update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 700 --slave /usr/bin/g++ g++ /usr/bin/g++-7
     - update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 800 --slave /usr/bin/g++ g++ /usr/bin/g++-8
   variables:
@@ -70,7 +51,9 @@ weekly-build-ubuntu-18.04-optimized:
   extends: .weekly-build-ubuntu
   image: ubuntu:18.04
   before_script:
-    - apt-get install gcc-8 g++-8 --yes
+    - apt-get --quiet update --yes
+    - DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata
+    - apt-get --quiet install gcc-8 g++-8 python python3 python-dev qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools openmpi-bin openmpi-common openmpi-doc libopenmpi-dev gsl-bin libgsl-dev ccache flex bison libfl-dev sqlite3 libsqlite3-dev libxml2 libxml2-dev libgtk-3-dev libboost-all-dev $LIBGSL --yes
     - update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 700 --slave /usr/bin/g++ g++ /usr/bin/g++-7
     - update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 800 --slave /usr/bin/g++ g++ /usr/bin/g++-8
   variables: