diff --git a/.woodpecker/test.yml b/.woodpecker/test.yml
index 1e7f30e..87cf516 100644
--- a/.woodpecker/test.yml
+++ b/.woodpecker/test.yml
@@ -3,8 +3,8 @@ workspace:
   path: package
 
 matrix:
-  NEOS_VERSION:
-    # - 4.3 not possible, because 4.3 does not run work with composer 2 - we had to install an older version of composer, too
+  FLOW_VERSION:
+    - 4.3
     - 5.3
 
 pipeline:
@@ -13,14 +13,35 @@ pipeline:
     environment:
       # Enable the PDO_SQLITE extension
       - "PHP_EXTENSION_PDO_SQLITE=1"
-      - "NEOS_VERSION=${NEOS_VERSION}"
-      - "NEOS_BUILD_DIR=/woodpecker/Build-$NEOS_VERSION"
+      - "FLOW_VERSION=${FLOW_VERSION}"
+      - "NEOS_BUILD_DIR=/woodpecker/Build-${FLOW_VERSION}"
     commands:
       - "sudo mkdir $NEOS_BUILD_DIR"
       - "sudo chown -R docker:docker $NEOS_BUILD_DIR"
       - "cd $NEOS_BUILD_DIR"
-      - "composer create-project --no-install neos/flow-base-distribution:^$NEOS_VERSION ."
+      - "if [ \"$FLOW_VERSION\" = \"4.3\" ]; then sudo composer self-update --1; fi"
+      - "composer create-project --no-install neos/flow-base-distribution:^$FLOW_VERSION ."
       - "composer config repositories.repo-name path /woodpecker/package"
       - "composer remove --dev neos/behat"
+      - "if [ \"$FLOW_VERSION\" = \"4.3\" ]; then composer require typo3fluid/fluid:2.4.3; fi"
       - "composer require digicomp/settingvalidator:@dev"
+      - |
+          if [ "$FLOW_VERSION" = "4.3" ]; then 
+            echo 'Neos:
+              Flow:
+                persistence:
+                  backendOptions:
+                    dbname: "flow_functional_testing"
+                error:
+                  errorHandler:
+                    exceptionalErrors:
+                      0: "%E_USER_ERROR%"
+                      1: "%E_RECOVERABLE_ERROR%"
+                      2: ~
+                      3: "%E_NOTICE%"
+                      4: "%E_USER_WARNING%"
+                      5: "%E_USER_NOTICE%"
+                      6: "%E_STRICT%"' > Configuration/Testing/Settings.yaml
+          fi
+      - "cat Configuration/Testing/Settings.yaml"
       - "bin/phpunit --configuration Build/BuildEssentials/PhpUnit/FunctionalTests.xml Packages/Application/DigiComp.SettingValidator/Tests/Functional"