diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index fc27189bb50e89b9921a8893679e1309550fa898..4a0a4608f2cebbb1ee2674e3cf5daa89ee5a3d9b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -32,15 +32,6 @@ stages:          # List of stages for jobs, and their order of execution
   - ctest -j$(nproc)
 
 ############ JOBS ############
-installation-test-xenial:
-  stage: install
-  cache: []
-  image: ubuntu:16.04
-  script:
-    - *script_gcc5_definition
-    - *script_install_definition
-    - *script_test_definition
-
 installation-test-bionic:
   stage: install
   cache: []
@@ -60,7 +51,7 @@ installation-test-focal:
 lint-test-job:
   stage: test
   cache: []
-  image: ubuntu:16.04
+  image: ubuntu:20.04
   script:
     - echo "Linting code... This will take about 10 seconds."
     - sleep 10