diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1c9ea4a54ae521f84f224f761c4bf543040f5949..27af1acb9297d94433b3a9c7c38c444df00a5e6b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -87,6 +87,7 @@ test9:
   script:
     - apt-get update && apt-get install -y make postgresql-plpython3-9.6 postgresql-server-dev-9.6 python3-pip
     - pip3 install -r requirements.txt
+    - make extension
     - make install
     - make installcheck || diff results tests/expected
   artifacts:
@@ -102,6 +103,7 @@ test10:
   script:
     - apt-get update && apt-get install -y make postgresql-plpython3-10 postgresql-server-dev-10 python3-pip
     - pip3 install -r requirements.txt
+    - make extension
     - make install
     - make installcheck || diff results tests/expected
   artifacts:
@@ -118,6 +120,7 @@ test11:
   script:
     - apt-get update && apt-get install -y make postgresql-plpython3-11 postgresql-server-dev-11 python3-pip
     - pip3 install -r requirements.txt
+    - make extension
     - make install
     - make installcheck || diff results tests/expected
   artifacts:
@@ -133,6 +136,23 @@ test12:
   script:
     - apt-get update && apt-get install -y make postgresql-plpython3-12 git postgresql-server-dev-12 python3-pip
     - pip3 install -r requirements.txt
+    - make extension
+    - make install
+    - make installcheck || diff results tests/expected
+  artifacts:
+    paths:
+        - regression.*
+        - results/
+    expire_in: 1 day
+
+test13:
+  stage: test
+  needs: []
+  image: postgres:13
+  script:
+    - apt-get update && apt-get install -y make postgresql-plpython3-13 git postgresql-server-dev-13 python3-pip
+    - pip3 install -r requirements.txt
+    - make extension
     - make install
     - make installcheck || diff results tests/expected
   artifacts: