diff --git a/phpunit.pgsql.xml b/phpunit.pgsql.xml
index 91c71fd..f62caea 100644
--- a/phpunit.pgsql.xml
+++ b/phpunit.pgsql.xml
@@ -6,7 +6,7 @@
 >
     <testsuites>
             <testsuite name="Pgsql">
-                <directory>tests/Feature/WorkspaceIsolation</directory>
+            <file>tests/Feature/WorkspaceIsolation/WorkspaceIdForeignKeyConstraintTest.php</file>
             </testsuite>
     </testsuites>