diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
index b244c470077bc..4269ad5d56737 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
@@ -29,10 +29,11 @@ import java.util.{Calendar, TimeZone}
  * precision.
  */
 object DateTimeUtils {
+  final val MILLIS_PER_DAY = SECONDS_PER_DAY * 1000L
+
   // see http://stackoverflow.com/questions/466321/convert-unix-timestamp-to-julian
   final val JULIAN_DAY_OF_EPOCH = 2440587  // and .5
   final val SECONDS_PER_DAY = 60 * 60 * 24L
-  final val MILLIS_PER_DAY = SECONDS_PER_DAY * 1000L
   final val HUNDRED_NANOS_PER_SECOND = 1000L * 1000L * 10L
   final val NANOS_PER_SECOND = HUNDRED_NANOS_PER_SECOND * 100
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/parquet/ParquetIOSuite.scala
index c5bce6e163a35..7b16eba00d6fb 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/parquet/ParquetIOSuite.scala
@@ -71,10 +71,7 @@ class ParquetIOSuiteBase extends QueryTest with ParquetTest {
    * Writes `data` to a Parquet file, reads it back and check file contents.
    */
   protected def checkParquetFile[T <: Product : ClassTag: TypeTag](data: Seq[T]): Unit = {
-    withParquetDataFrame(data) { r =>
-      r.foreach(println)
-      checkAnswer(r, data.map(Row.fromTuple))
-    }
+    withParquetDataFrame(data)(r => checkAnswer(r, data.map(Row.fromTuple)))
   }
 
   test("basic data types (without binary)") {
@@ -151,7 +148,7 @@ class ParquetIOSuiteBase extends QueryTest with ParquetTest {
   }
 
   test("map") {
-    val data = (1 to 4).map(i => Tuple1(Map(i -> (i + 1), (i + 1) -> (i + 2))))
+    val data = (1 to 4).map(i => Tuple1(Map(i -> s"val_$i")))
     checkParquetFile(data)
   }
 
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
index 19c8175cfef6f..9d79a4b007d66 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
@@ -21,6 +21,7 @@ import java.io.File
 
 import org.scalatest.BeforeAndAfterAll
 
+import org.apache.spark.sql._
 import org.apache.spark.sql.execution.{ExecutedCommand, PhysicalRDD}
 import org.apache.spark.sql.hive.execution.HiveTableScan
 import org.apache.spark.sql.hive.test.TestHive
@@ -30,7 +31,6 @@ import org.apache.spark.sql.parquet.{ParquetRelation2, ParquetTableScan}
 import org.apache.spark.sql.sources.{InsertIntoDataSource, InsertIntoHadoopFsRelation, LogicalRelation}
 import org.apache.spark.sql.test.SQLTestUtils
 import org.apache.spark.sql.types._
-import org.apache.spark.sql.{DataFrame, QueryTest, Row, SQLConf, SaveMode}
 import org.apache.spark.util.Utils
 
 // The data where the partitioning key exists only in the directory structure.
@@ -790,7 +790,7 @@ class ParquetDataSourceOffSourceSuite extends ParquetSourceSuiteBase {
  * A collection of tests for parquet data with various forms of partitioning.
  */
 abstract class ParquetPartitioningTest extends QueryTest with SQLTestUtils with BeforeAndAfterAll {
-  override def sqlContext = TestHive
+  override def sqlContext: SQLContext = TestHive
 
   var partitionedTableDir: File = null
   var normalTableDir: File = null