diff --git a/DataStructures/DisjointSets/DisjointSetTest.php b/tests/DataStructures/DisjointSetTest.php
similarity index 98%
rename from DataStructures/DisjointSets/DisjointSetTest.php
rename to tests/DataStructures/DisjointSetTest.php
index ed33e9f9..efcaaf9f 100644
--- a/DataStructures/DisjointSets/DisjointSetTest.php
+++ b/tests/DataStructures/DisjointSetTest.php
@@ -1,6 +1,9 @@
 <?php
 
+namespace DataStructures;
+
 use DataStructures\DisjointSets\DisjointSetNode;
+use DisjointSet;
 use PHPUnit\Framework\TestCase;
 
 class DisjointSetTest extends TestCase