diff --git a/spatial-partition/src/main/java/com/iluwatar/spatialpartition/SpatialPartitionBubbles.java b/spatial-partition/src/main/java/com/iluwatar/spatialpartition/SpatialPartitionBubbles.java
index 5faef509d..897466a99 100644
--- a/spatial-partition/src/main/java/com/iluwatar/spatialpartition/SpatialPartitionBubbles.java
+++ b/spatial-partition/src/main/java/com/iluwatar/spatialpartition/SpatialPartitionBubbles.java
@@ -34,11 +34,11 @@ import java.util.HashMap;
 public class SpatialPartitionBubbles extends SpatialPartitionGeneric<Bubble> {
 
   private final HashMap<Integer, Bubble> bubbles;
-  private final QuadTree quadTree;
+  private final QuadTree bubblesQuadTree;
 
-  SpatialPartitionBubbles(HashMap<Integer, Bubble> bubbles, QuadTree quadTree) {
+  SpatialPartitionBubbles(HashMap<Integer, Bubble> bubbles, QuadTree bubblesQuadTree) {
     this.bubbles = bubbles;
-    this.quadTree = quadTree;
+    this.bubblesQuadTree = bubblesQuadTree;
   }
 
   void handleCollisionsUsingQt(Bubble b) {
@@ -46,7 +46,7 @@ public class SpatialPartitionBubbles extends SpatialPartitionGeneric<Bubble> {
     // centre of bubble and length = radius of bubble
     var rect = new Rect(b.coordinateX, b.coordinateY, 2D * b.radius, 2D * b.radius);
     var quadTreeQueryResult = new ArrayList<Point>();
-    this.quadTree.query(rect, quadTreeQueryResult);
+    this.bubblesQuadTree.query(rect, quadTreeQueryResult);
     //handling these collisions
     b.handleCollision(quadTreeQueryResult, this.bubbles);
   }