diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9e9276b..7a35f7a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,24 +12,6 @@ jobs:
     strategy:
       matrix:
         include:
-          - mw: 'REL1_36'
-            php: 8.0
-            experimental: false
-          - mw: 'REL1_37'
-            php: 8.0
-            experimental: false
-          - mw: 'REL1_38'
-            php: 8.0
-            experimental: false
-          - mw: 'REL1_39'
-            php: 8.0
-            experimental: false
-          - mw: 'REL1_41'
-            php: 8.1
-            experimental: false
-          - mw: 'REL1_42'
-            php: 8.2
-            experimental: false
           - mw: 'REL1_43'
             php: 8.3
             experimental: false
@@ -88,17 +70,18 @@ jobs:
       - name: Run update.php
         run: php maintenance/update.php --quick
 
-      - name: Run PHPUnit
+      - name: Run PHPUnit (MW < master)
+        if: matrix.mw != 'master'
         run: php tests/phpunit/phpunit.php -c extensions/AutomatedValues/
-        if: matrix.php != 7.4
 
-      - name: Run PHPUnit with code coverage
-        run: php tests/phpunit/phpunit.php -c extensions/AutomatedValues/ --coverage-clover coverage.xml
-        if: matrix.php == 7.4
-
-      - name: Upload code coverage
-        run: bash <(curl -s https://codecov.io/bash)
-        if: matrix.php == 7.4
+      - name: Run PHPUnit (MW master)
+        if: matrix.mw == 'master'
+        run: |
+          # phpunit.xml.template is export-ignored from the GitHub tarball, fetch it separately
+          if [ ! -f phpunit.xml.template ]; then
+            wget -q -O phpunit.xml.template "https://raw.githubusercontent.com/wikimedia/mediawiki/${{ matrix.mw }}/phpunit.xml.template"
+          fi
+          composer phpunit -- extensions/AutomatedValues/tests/
 
 
 
@@ -116,7 +99,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 7.4
+          php-version: 8.3
           extensions: mbstring
           tools: composer, cs2pr
 
@@ -128,7 +111,7 @@ jobs:
             mediawiki
             mediawiki/extensions/
             mediawiki/vendor/
-          key: mw_phpstan
+          key: mw_phpstan_v3
 
       - name: Cache Composer cache
         uses: actions/cache@v4
@@ -143,7 +126,7 @@ jobs:
       - name: Install MediaWiki
         if: steps.cache-mediawiki.outputs.cache-hit != 'true'
         working-directory: ~
-        run: bash EarlyCopy/.github/workflows/installMediaWiki.sh REL1_39 AutomatedValues
+        run: bash EarlyCopy/.github/workflows/installMediaWiki.sh REL1_43 AutomatedValues
 
       - uses: actions/checkout@v4
         with:
@@ -176,7 +159,7 @@ jobs:
           - name: Setup PHP
             uses: shivammathur/setup-php@v2
             with:
-                php-version: 7.4
+                php-version: 8.3
                 extensions: mbstring
                 tools: composer, cs2pr
 
@@ -188,7 +171,7 @@ jobs:
                     mediawiki
                     mediawiki/extensions/
                     mediawiki/vendor/
-                key: mw_psalm
+                key: mw_psalm_v3
 
           - name: Cache Composer cache
             uses: actions/cache@v4
@@ -203,7 +186,7 @@ jobs:
           - name: Install MediaWiki
             if: steps.cache-mediawiki.outputs.cache-hit != 'true'
             working-directory: ~
-            run: bash EarlyCopy/.github/workflows/installMediaWiki.sh REL1_39 AutomatedValues
+            run: bash EarlyCopy/.github/workflows/installMediaWiki.sh REL1_43 AutomatedValues
 
           - uses: actions/checkout@v4
             with:
@@ -236,7 +219,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.0
+          php-version: 8.3
           extensions: mbstring, intl, php-ast
           tools: composer
 
@@ -248,7 +231,7 @@ jobs:
             mediawiki
             !mediawiki/extensions/
             !mediawiki/vendor/
-          key: mw_static_analysis
+          key: mw_static_analysis_v3
 
       - name: Cache Composer cache
         uses: actions/cache@v4
@@ -256,10 +239,14 @@ jobs:
           path: ~/.composer/cache
           key: composer_static_analysis
 
+      - uses: actions/checkout@v4
+        with:
+            path: EarlyCopy
+
       - name: Install MediaWiki
         if: steps.cache-mediawiki.outputs.cache-hit != 'true'
         working-directory: ~
-        run: curl https://gist.githubusercontent.com/JeroenDeDauw/49a3858653ff4b5be7ec849019ede06c/raw/installMediaWiki.sh | bash -s REL1_36 AutomatedValues
+        run: bash EarlyCopy/.github/workflows/installMediaWiki.sh REL1_43 AutomatedValues
 
       - uses: actions/checkout@v4
         with:
diff --git a/extension.json b/extension.json
index a54301d..01a580f 100644
--- a/extension.json
+++ b/extension.json
@@ -16,7 +16,7 @@
 	"descriptionmsg": "automated-values-description",
 
 	"requires": {
-		"MediaWiki": ">= 1.35.0",
+		"MediaWiki": ">= 1.43.0",
 		"extensions": {
 			"WikibaseRepository": "*"
 		}
diff --git a/src/AutomatedValuesFactory.php b/src/AutomatedValuesFactory.php
index c2689b3..e47920a 100644
--- a/src/AutomatedValuesFactory.php
+++ b/src/AutomatedValuesFactory.php
@@ -11,7 +11,7 @@
 use ProfessionalWiki\AutomatedValues\DataAccess\RulesJsonValidator;
 use ProfessionalWiki\AutomatedValues\DataAccess\RulesLookup;
 use ProfessionalWiki\AutomatedValues\DataAccess\WikiRulesLookup;
-use Title;
+use MediaWiki\Title\Title;
 
 class AutomatedValuesFactory {
 
diff --git a/src/DataAccess/PageContentFetcher.php b/src/DataAccess/PageContentFetcher.php
index 73e00a8..bbb595d 100644
--- a/src/DataAccess/PageContentFetcher.php
+++ b/src/DataAccess/PageContentFetcher.php
@@ -4,26 +4,30 @@
 
 namespace ProfessionalWiki\AutomatedValues\DataAccess;
 
+use MediaWiki\Content\Content;
 use MediaWiki\Revision\RevisionLookup;
+use MediaWiki\Title\MalformedTitleException;
+use MediaWiki\Title\Title;
+use MediaWiki\Title\TitleParser;
 
 class PageContentFetcher {
 
-	private \TitleParser $titleParser;
+	private TitleParser $titleParser;
 	private RevisionLookup $revisionLookup;
 
-	public function __construct( \TitleParser $titleParser, RevisionLookup $revisionLookup ) {
+	public function __construct( TitleParser $titleParser, RevisionLookup $revisionLookup ) {
 		$this->titleParser = $titleParser;
 		$this->revisionLookup = $revisionLookup;
 	}
 
-	public function getPageContent( string $pageTitle ): ?\Content {
+	public function getPageContent( string $pageTitle ): ?Content {
 		try {
-			$title = $this->titleParser->parseTitle( $pageTitle );
-		} catch ( \MalformedTitleException $e ) {
+			$linkTarget = $this->titleParser->parseTitle( $pageTitle );
+		} catch ( MalformedTitleException $e ) {
 			return null;
 		}
 
-		$revision = $this->revisionLookup->getRevisionByTitle( $title );
+		$revision = $this->revisionLookup->getRevisionByTitle( Title::newFromLinkTarget( $linkTarget ) );
 
 		if ( $revision === null ) {
 			return null;
diff --git a/src/DataAccess/WikiRulesLookup.php b/src/DataAccess/WikiRulesLookup.php
index 05cc42a..108641d 100644
--- a/src/DataAccess/WikiRulesLookup.php
+++ b/src/DataAccess/WikiRulesLookup.php
@@ -4,6 +4,7 @@
 
 namespace ProfessionalWiki\AutomatedValues\DataAccess;
 
+use MediaWiki\Content\JsonContent;
 use ProfessionalWiki\AutomatedValues\Domain\Rules;
 
 class WikiRulesLookup implements RulesLookup {
@@ -21,14 +22,14 @@ public function __construct( PageContentFetcher $contentFetcher, RulesDeserializ
 	public function getRules(): Rules {
 		$content = $this->contentFetcher->getPageContent( 'MediaWiki:' . $this->pageName );
 
-		if ( $content instanceof \JsonContent ) {
+		if ( $content instanceof JsonContent ) {
 			return $this->rulesFromJsonContent( $content );
 		}
 
 		return new Rules();
 	}
 
-	private function rulesFromJsonContent( \JsonContent $content ): Rules {
+	private function rulesFromJsonContent( JsonContent $content ): Rules {
 		return $this->deserializer->deserialize( $content->getText() );
 	}
 
diff --git a/src/Hooks.php b/src/Hooks.php
index 047c677..7ac7f4e 100644
--- a/src/Hooks.php
+++ b/src/Hooks.php
@@ -4,12 +4,12 @@
 
 namespace ProfessionalWiki\AutomatedValues;
 
-use EditPage;
+use MediaWiki\EditPage\EditPage;
+use MediaWiki\Html\Html;
 use MediaWiki\Revision\RenderedRevision;
 use MediaWiki\Revision\RevisionAccessException;
-use OutputPage;
+use MediaWiki\Title\Title;
 use ProfessionalWiki\AutomatedValues\DataAccess\RulesJsonValidator;
-use Title;
 use Wikibase\DataModel\Entity\StatementListProvidingEntity;
 use Wikibase\Repo\Content\EntityContent;
 
@@ -45,7 +45,7 @@ public static function onEditFilter( EditPage $editPage, ?string $text, ?string
 			&& !RulesJsonValidator::newInstance()->validate( $text ) ) {
 
 			// Would be nice to show a more specific error message, but at the moment RulesJsonValidator does not support this.
-			$error = \Html::errorBox( wfMessage( 'automated-values-config-invalid' )->escaped() );
+			$error = Html::errorBox( wfMessage( 'automated-values-config-invalid' )->escaped() );
 		}
 	}
 
diff --git a/src/SpecialAutomatedValues.php b/src/SpecialAutomatedValues.php
index 6916f4f..ce44d5f 100644
--- a/src/SpecialAutomatedValues.php
+++ b/src/SpecialAutomatedValues.php
@@ -4,7 +4,8 @@
 
 namespace ProfessionalWiki\AutomatedValues;
 
-use SpecialPage;
+use MediaWiki\SpecialPage\SpecialPage;
+use MediaWiki\Title\Title;
 
 class SpecialAutomatedValues extends SpecialPage {
 
@@ -15,9 +16,9 @@ public function __construct() {
 	public function execute( $subPage ): void {
 		parent::execute( $subPage );
 
-		$title = \Title::newFromText( 'MediaWiki:AutomatedValues' );
+		$title = Title::newFromText( 'MediaWiki:AutomatedValues' );
 
-		if ( $title instanceof \Title ) {
+		if ( $title instanceof Title ) {
 			$this->getOutput()->redirect( $title->getFullURL() );
 		}
 	}