diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a0f15f4..00605d5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
             php: 8.3
             type: normal
             experimental: false
-          - mw: 'master'
+          - mw: 'REL1_46'
             php: 8.4
             type: normal
             experimental: true
@@ -95,12 +95,32 @@ jobs:
         run: bash EarlyCopy/.github/workflows/uploadImages.sh
 
       - if: env.TYPE != 'coverage'
-        name: Run PHPUnit w/o coverage
-        run: php tests/phpunit/phpunit.php -c extensions/BootstrapComponents/ --testsuite bootstrap-components-unit
+        name: Run PHPUnit
+        run: |
+          if [ -f tests/phpunit/phpunit.php ]; then
+            php tests/phpunit/phpunit.php -c extensions/BootstrapComponents/ --testsuite bootstrap-components-unit
+          else
+            # MW 1.46 and later
+            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:config
+            vendor/bin/phpunit -c phpunit.xml extensions/BootstrapComponents/tests/phpunit/Unit
+          fi
 
       - if: env.TYPE == 'coverage'
-        name: Run PHPUnit w/ coverage
-        run: php tests/phpunit/phpunit.php -c extensions/BootstrapComponents/ --testsuite bootstrap-components-unit --coverage-clover coverage.clover
+        name: Run PHPUnit (coverage)
+        run: |
+          if [ -f tests/phpunit/phpunit.php ]; then
+            php tests/phpunit/phpunit.php -c extensions/BootstrapComponents/ --testsuite bootstrap-components-unit --coverage-clover coverage.clover
+          else
+            # MW 1.46 and later
+            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:config
+            vendor/bin/phpunit -c phpunit.xml extensions/BootstrapComponents/tests/phpunit/Unit --coverage-clover coverage.clover
+          fi
 
       - if: env.TYPE == 'coverage'
         name: upload coverage report
diff --git a/tests/phpunit/Unit/LuaLibraryTestBase.php b/tests/phpunit/Unit/LuaLibraryTestBase.php
index 12a3953..2fcabec 100644
--- a/tests/phpunit/Unit/LuaLibraryTestBase.php
+++ b/tests/phpunit/Unit/LuaLibraryTestBase.php
@@ -3,7 +3,7 @@
 namespace MediaWiki\Extension\BootstrapComponents\Tests\Unit;
 
 use MediaWiki\Extension\BootstrapComponents\LuaLibrary;
-use Scribunto_LuaEngineTestBase;
+use MediaWiki\Extension\Scribunto\Tests\Engines\LuaCommon\LuaEngineTestBase;
 
 /**
  * @ingroup Test
@@ -15,7 +15,7 @@
  * @since   1.1
  * @author  Tobias Oetterer
  */
-abstract class LuaLibraryTestBase extends Scribunto_LuaEngineTestBase
+abstract class LuaLibraryTestBase extends LuaEngineTestBase
 {
 	/**
 	 * @var LuaLibrary