--- a/jdk/test/java/util/Arrays/ParallelPrefix.java	Thu Jun 04 19:00:56 2015 +0100
+++ b/jdk/test/java/util/Arrays/ParallelPrefix.java	Thu Jun 04 19:28:45 2015 +0100
@@ -51,7 +51,7 @@
     private final static int MEDIUM_ARRAY_SIZE = 1 << 8;
 
     //Array size much greater than MIN_PARTITION
-    private final static int LARGE_ARRAY_SIZE = 1 << 12;
+    private final static int LARGE_ARRAY_SIZE = 1 << 14;
 
     private final static int[] ARRAY_SIZE_COLLECTION  = new int[]{
         SMALL_ARRAY_SIZE,
@@ -60,7 +60,7 @@
         LARGE_ARRAY_SIZE
     };
 
-    @DataProvider
+    @DataProvider(name = "intSet")
     public static Object[][] intSet(){
         return genericData(size -> IntStream.range(0, size).toArray(),
                 new IntBinaryOperator[]{
@@ -68,7 +68,7 @@
                     Integer::min});
     }
 
-    @DataProvider
+    @DataProvider(name = "longSet")
     public static Object[][] longSet(){
         return genericData(size -> LongStream.range(0, size).toArray(),
                 new LongBinaryOperator[]{
@@ -76,7 +76,7 @@
                     Long::min});
     }
 
-    @DataProvider
+    @DataProvider(name = "doubleSet")
     public static Object[][] doubleSet(){
         return genericData(size -> IntStream.range(0, size).mapToDouble(i -> (double)i).toArray(),
                 new DoubleBinaryOperator[]{
@@ -84,7 +84,7 @@
                     Double::min});
     }
 
-    @DataProvider
+    @DataProvider(name = "stringSet")
     public static Object[][] stringSet(){
         Function<Integer, String[]> stringsFunc = size ->
                 IntStream.range(0, size).mapToObj(Integer::toString).toArray(String[]::new);
@@ -121,11 +121,11 @@
 
         int[] parallelResult = data.clone();
         Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
-        assertEquals(parallelResult, sequentialResult);
+        assertArraysEqual(parallelResult, sequentialResult);
 
         int[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
         Arrays.parallelPrefix(parallelRangeResult, op);
-        assertEquals(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
+        assertArraysEqual(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
     }
 
     @Test(dataProvider="longSet")
@@ -137,11 +137,11 @@
 
         long[] parallelResult = data.clone();
         Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
-        assertEquals(parallelResult, sequentialResult);
+        assertArraysEqual(parallelResult, sequentialResult);
 
         long[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
         Arrays.parallelPrefix(parallelRangeResult, op);
-        assertEquals(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
+        assertArraysEqual(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
     }
 
     @Test(dataProvider="doubleSet")
@@ -153,11 +153,11 @@
 
         double[] parallelResult = data.clone();
         Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
-        assertEquals(parallelResult, sequentialResult);
+        assertArraysEqual(parallelResult, sequentialResult);
 
         double[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
         Arrays.parallelPrefix(parallelRangeResult, op);
-        assertEquals(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
+        assertArraysEqual(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
     }
 
     @Test(dataProvider="stringSet")
@@ -169,11 +169,11 @@
 
         String[] parallelResult = data.clone();
         Arrays.parallelPrefix(parallelResult, fromIndex, toIndex, op);
-        assertEquals(parallelResult, sequentialResult);
+        assertArraysEqual(parallelResult, sequentialResult);
 
         String[] parallelRangeResult = Arrays.copyOfRange(data, fromIndex, toIndex);
         Arrays.parallelPrefix(parallelRangeResult, op);
-        assertEquals(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
+        assertArraysEqual(parallelRangeResult, Arrays.copyOfRange(sequentialResult, fromIndex, toIndex));
     }
 
     @Test
@@ -293,5 +293,41 @@
     public static void assertInstance(Object actual, Class<?> expected, String message) {
         assertTrue(expected.isInstance(actual), message);
     }
+
+    static void assertArraysEqual(int[] actual, int[] expected) {
+        try {
+            assertEquals(actual, expected, "");
+        } catch (AssertionError x) {
+            throw new AssertionError(String.format("Expected:%s, actual:%s",
+                    Arrays.toString(expected), Arrays.toString(actual)), x);
+        }
+    }
+
+    static void assertArraysEqual(long[] actual, long[] expected) {
+        try {
+            assertEquals(actual, expected, "");
+        } catch (AssertionError x) {
+            throw new AssertionError(String.format("Expected:%s, actual:%s",
+                    Arrays.toString(expected), Arrays.toString(actual)), x);
+        }
+    }
+
+    static void assertArraysEqual(double[] actual, double[] expected) {
+        try {
+            assertEquals(actual, expected, "");
+        } catch (AssertionError x) {
+            throw new AssertionError(String.format("Expected:%s, actual:%s",
+                    Arrays.toString(expected), Arrays.toString(actual)), x);
+        }
+    }
+
+    static void assertArraysEqual(String[] actual, String[] expected) {
+        try {
+            assertEquals(actual, expected, "");
+        } catch (AssertionError x) {
+            throw new AssertionError(String.format("Expected:%s, actual:%s",
+                    Arrays.toString(expected), Arrays.toString(actual)), x);
+        }
+    }
 }