diff --git a/mllib/src/test/scala/org/apache/spark/mllib/fpm/PrefixSpanSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/fpm/PrefixSpanSuite.scala
index e1d05e229d605..8f766cee7b2d5 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/fpm/PrefixSpanSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/fpm/PrefixSpanSuite.scala
@@ -114,58 +114,58 @@ class PrefixSpanSuite extends SparkFunSuite with MLlibTestSparkContext {
     val result = prefixspan.run(rdd)
     val expectedValue = Array(
       (Array(1), 4L),
-      (Array(1,-1,6), 2L),
-      (Array(1,-1,1), 2L),
-      (Array(1,-1,3), 4L),
-      (Array(1,-1,3,-1,1), 2L),
-      (Array(1,-1,3,-1,3), 3L),
-      (Array(1,-1,3,-1,2), 3L),
-      (Array(1,-1,2), 4L),
-      (Array(1,-1,2,-1,1), 2L),
-      (Array(1,-1,2,-1,3), 2L),
-      (Array(1,-1,2,3), 2L),
-      (Array(1,-1,2,3,-1,1), 2L),
-      (Array(1,2), 2L),
-      (Array(1,2,-1,6), 2L),
-      (Array(1,2,-1,3), 2L),
-      (Array(1,2,-1,4), 2L),
-      (Array(1,2,-1,4,-1,3), 2L),
-      (Array(1,-1,4), 2L),
-      (Array(1,-1,4,-1,3), 2L),
+      (Array(1,-1, 6), 2L),
+      (Array(1,-1, 1), 2L),
+      (Array(1,-1, 3), 4L),
+      (Array(1,-1, 3, -1, 1), 2L),
+      (Array(1,-1, 3, -1, 3), 3L),
+      (Array(1,-1, 3, -1, 2), 3L),
+      (Array(1,-1, 2), 4L),
+      (Array(1,-1, 2, -1, 1), 2L),
+      (Array(1,-1, 2, -1, 3), 2L),
+      (Array(1,-1, 2, 3), 2L),
+      (Array(1,-1, 2, 3, -1, 1), 2L),
+      (Array(1, 2), 2L),
+      (Array(1, 2, -1, 6), 2L),
+      (Array(1, 2, -1, 3), 2L),
+      (Array(1, 2, -1, 4), 2L),
+      (Array(1, 2, -1, 4, -1, 3), 2L),
+      (Array(1, -1, 4), 2L),
+      (Array(1, -1, 4, -1, 3), 2L),
       (Array(2), 4L),
-      (Array(2,-1,6), 2L),
-      (Array(2,-1,1), 2L),
-      (Array(2,-1,3), 3L),
-      (Array(2,3), 2L),
-      (Array(2,3,-1,1), 2L),
-      (Array(2,-1,4), 2L),
-      (Array(2,-1,4,-1,3), 2L),
+      (Array(2, -1, 6), 2L),
+      (Array(2, -1, 1), 2L),
+      (Array(2, -1, 3), 3L),
+      (Array(2, 3), 2L),
+      (Array(2, 3, -1, 1), 2L),
+      (Array(2, -1, 4), 2L),
+      (Array(2, -1, 4, -1, 3), 2L),
       (Array(3), 4L),
-      (Array(3,-1,1), 2L),
-      (Array(3,-1,3), 3L),
-      (Array(3,-1,2), 3L),
+      (Array(3, -1, 1), 2L),
+      (Array(3, -1, 3), 3L),
+      (Array(3, -1, 2), 3L),
       (Array(4), 3L),
-      (Array(4,-1,3), 3L),
-      (Array(4,-1,3,-1,2), 2L),
-      (Array(4,-1,2), 2L),
+      (Array(4, -1, 3), 3L),
+      (Array(4, -1, 3, -1, 2), 2L),
+      (Array(4, -1, 2), 2L),
       (Array(5), 3L),
-      (Array(5,-1,6), 2L),
-      (Array(5,-1,6,-1,3), 2L),
-      (Array(5,-1,6,-1,3,-1,2), 2L),
-      (Array(5,-1,6,-1,2), 2L),
-      (Array(5,-1,1), 2L),
-      (Array(5,-1,1,-1,3), 2L),
-      (Array(5,-1,1,-1,3,-1,2), 2L),
-      (Array(5,-1,1,-1,2), 2L),
-      (Array(5,-1,3), 2L),
-      (Array(5,-1,3,-1,2), 2L),
-      (Array(5,-1,2), 2L),
-      (Array(5,-1,2,-1,3), 2L),
+      (Array(5, -1, 6), 2L),
+      (Array(5, -1, 6, -1, 3), 2L),
+      (Array(5, -1, 6, -1, 3, -1, 2), 2L),
+      (Array(5, -1, 6, -1, 2), 2L),
+      (Array(5, -1, 1), 2L),
+      (Array(5, -1, 1, -1, 3), 2L),
+      (Array(5, -1, 1, -1, 3, -1, 2), 2L),
+      (Array(5, -1, 1, -1, 2), 2L),
+      (Array(5, -1, 3), 2L),
+      (Array(5, -1, 3, -1, 2), 2L),
+      (Array(5, -1, 2), 2L),
+      (Array(5, -1, 2, -1, 3), 2L),
       (Array(6), 3L),
-      (Array(6,-1,3), 2L),
-      (Array(6,-1,3,-1,2), 2L),
-      (Array(6,-1,2), 2L),
-      (Array(6,-1,2,-1,3), 2L))
+      (Array(6, -1, 3), 2L),
+      (Array(6, -1, 3, -1, 2), 2L),
+      (Array(6, -1, 2), 2L),
+      (Array(6, -1, 2, -1, 3), 2L))
     assert(compareResults(expectedValue, result.collect()))
   }