diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 210b84b..449037e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,6 +33,8 @@ jobs:
             spark-version: 3.1.1
           - scala-version: 2.12.11
             spark-version: 3.2.0
+          - scala-version: 2.13.10
+            spark-version: 3.2.0
     if: "! contains(toJSON(github.event.commits.*.message), '[skip ci]')"
     steps:
       - name: Check out code
diff --git a/isolation-forest/src/main/scala/com/linkedin/relevance/isolationforest/BaggedPoint.scala b/isolation-forest/src/main/scala/com/linkedin/relevance/isolationforest/BaggedPoint.scala
index b469e24..254b5ac 100644
--- a/isolation-forest/src/main/scala/com/linkedin/relevance/isolationforest/BaggedPoint.scala
+++ b/isolation-forest/src/main/scala/com/linkedin/relevance/isolationforest/BaggedPoint.scala
@@ -164,10 +164,10 @@ private[isolationforest] case object BaggedPoint {
         subsampleWeightBase + (if (rnd.nextFloat() < subsampleWeightDiff) 1 else 0)
     }
 
-    baggedRdd.flatMap {
-      baggedPoint => baggedPoint.subsampleWeights.zipWithIndex.flatMap {
+    baggedRdd.flatMap { baggedPoint =>
+      baggedPoint.subsampleWeights.zipWithIndex.flatMap {
         case (subsampleWeight, subsampleId) => {
-          Array.fill(roundWeight(subsampleWeight))((subsampleId, baggedPoint.datum))
+          Seq.fill(roundWeight(subsampleWeight))((subsampleId, baggedPoint.datum))
         }
       }
     }
diff --git a/isolation-forest/src/main/scala/com/linkedin/relevance/isolationforest/IsolationTree.scala b/isolation-forest/src/main/scala/com/linkedin/relevance/isolationforest/IsolationTree.scala
index 0554276..94075cb 100644
--- a/isolation-forest/src/main/scala/com/linkedin/relevance/isolationforest/IsolationTree.scala
+++ b/isolation-forest/src/main/scala/com/linkedin/relevance/isolationforest/IsolationTree.scala
@@ -105,7 +105,7 @@ private[isolationforest] case object IsolationTree extends Logging {
         */
       def getFeatureToSplit(data: Array[DataPoint]): (Int, Double) = {
 
-        val availableFeatures = featureIndices.to[ListBuffer]
+        val availableFeatures = ListBuffer.empty[Int] ++ featureIndices 
         var foundFeature = false
         var featureIndex = -1
         var featureSplitValue = 0.0
diff --git a/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/BaggedPointTest.scala b/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/BaggedPointTest.scala
index befa704..0e52016 100644
--- a/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/BaggedPointTest.scala
+++ b/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/BaggedPointTest.scala
@@ -175,7 +175,7 @@ class BaggedPointTest {
 
     val expectedSumArray = expectedResult.map(x => x._1 + x._2.features.sum).sorted
     val actualSumArray = flattenedBaggedPointArray.map(x => x._1 + x._2.features.sum).sorted
-    Assert.assertTrue(expectedSumArray.deep == actualSumArray.deep)
+    Assert.assertEquals(expectedSumArray.toSeq, actualSumArray.toSeq) 
   }
 
   @Test(description = "flattenBaggedRDDNonIntegerWeightTest")
diff --git a/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/IsolationForestModelWriteReadTest.scala b/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/IsolationForestModelWriteReadTest.scala
index 3127712..96d3d8c 100644
--- a/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/IsolationForestModelWriteReadTest.scala
+++ b/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/IsolationForestModelWriteReadTest.scala
@@ -66,7 +66,7 @@ class IsolationForestModelWriteReadTest extends Logging {
     // Assert the predicted labels are equal
     val predictedLabels1 = scores1.map(x => x.predictedLabel).collect
     val predictedLabels2 = scores2.map(x => x.predictedLabel).collect
-    Assert.assertEquals(predictedLabels1.deep, predictedLabels2.deep)
+    Assert.assertEquals(predictedLabels1.toSeq, predictedLabels2.toSeq) 
 
     // Compare each tree in the original and saved/loaded model and assert they are equal
     isolationForestModel1.isolationTrees
@@ -131,8 +131,8 @@ class IsolationForestModelWriteReadTest extends Logging {
     val predictedLabels1 = scores1.map(x => x.predictedLabel).collect
     val predictedLabels2 = scores2.map(x => x.predictedLabel).collect
     val expectedLabels = Array.fill[Double](predictedLabels1.length)(0.0)
-    Assert.assertEquals(predictedLabels1.deep, predictedLabels2.deep)
-    Assert.assertEquals(predictedLabels2.deep, expectedLabels.deep)
+    Assert.assertEquals(predictedLabels1.toSeq, predictedLabels2.toSeq) 
+    Assert.assertEquals(predictedLabels2.toSeq, expectedLabels.toSeq) 
 
     // Compare each tree in the original and saved/loaded model and assert they are equal
     isolationForestModel1.isolationTrees
@@ -197,8 +197,8 @@ class IsolationForestModelWriteReadTest extends Logging {
     val scores2 = isolationForestModel2.transform(data).as[ScoringResult]
 
     Assert.assertEquals(
-      scores1.map(x => x.outlierScore).collect.deep,
-      scores2.map(x => x.outlierScore).collect.deep)
+      scores1.map(x => x.outlierScore).collect.toSeq,
+      scores2.map(x => x.outlierScore).collect.toSeq)
 
     spark.stop()
   }
diff --git a/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/IsolationForestTest.scala b/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/IsolationForestTest.scala
index 5e3a968..0ba5371 100644
--- a/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/IsolationForestTest.scala
+++ b/isolation-forest/src/test/scala/com/linkedin/relevance/isolationforest/IsolationForestTest.scala
@@ -150,9 +150,10 @@ class IsolationForestTest {
     val scores = isolationForestModel.transform(data).as[ScoringResult]
     val predictedLabels = scores.map(x => x.predictedLabel).collect
     val expectedLabels = Array.fill[Double](predictedLabels.length)(0.0)
+
     Assert.assertEquals(
-      predictedLabels.deep,
-      expectedLabels.deep,
+      predictedLabels.toSeq,
+      expectedLabels.toSeq,
       "expected all predicted labels to be 0.0")
 
     spark.stop()