diff --git a/phpunit-integration-legacy-solr.xml b/phpunit-integration-legacy-solr.xml
index 3dce726268..70513747fe 100644
--- a/phpunit-integration-legacy-solr.xml
+++ b/phpunit-integration-legacy-solr.xml
@@ -19,6 +19,7 @@
         <env name="SYMFONY_DEPRECATIONS_HELPER" value="disabled"/>
         <ini name="error_reporting" value="-1" />
         <env name="KERNEL_CLASS" value="Ibexa\Contracts\Core\Test\IbexaTestKernel"/>
+        <env name="SEARCH_ENGINE" value="solr"/>
     </php>
     <testsuites>
         <!-- Search service is used all over the place, so we must run entire integration test suite -->
diff --git a/phpunit-integration-legacy.xml b/phpunit-integration-legacy.xml
index 6b1da1c84c..cb4a636435 100644
--- a/phpunit-integration-legacy.xml
+++ b/phpunit-integration-legacy.xml
@@ -18,6 +18,7 @@
         <ini name="error_reporting" value="-1" />
         <env name="DATABASE_URL" value="sqlite://:memory:" />
         <env name="KERNEL_CLASS" value="Ibexa\Contracts\Core\Test\IbexaTestKernel"/>
+        <env name="SEARCH_ENGINE" value="legacy"/>
     </php>
     <testsuites>
         <testsuite name="integration_core">