diff --git a/core/src/test/java/org/elasticsearch/common/compress/AbstractCompressedStreamTests.java b/core/src/test/java/org/elasticsearch/common/compress/AbstractCompressedStreamTests.java
index 62ea9b6070a..b5800f34411 100644
--- a/core/src/test/java/org/elasticsearch/common/compress/AbstractCompressedStreamTests.java
+++ b/core/src/test/java/org/elasticsearch/common/compress/AbstractCompressedStreamTests.java
@@ -48,7 +48,7 @@ public abstract class AbstractCompressedStreamTests extends ESTestCase {
     public void testRandom() throws IOException {
         Random r = getRandom();
         for (int i = 0; i < 10; i++) {
-            byte bytes[] = new byte[TestUtil.nextInt(r, 1, 400000)];
+            byte bytes[] = new byte[TestUtil.nextInt(r, 1, 100000)];
             r.nextBytes(bytes);
             doTest(bytes);
         }
@@ -56,7 +56,7 @@ public abstract class AbstractCompressedStreamTests extends ESTestCase {
 
     public void testRandomThreads() throws Exception {
         final Random r = getRandom();
-        int threadCount = TestUtil.nextInt(r, 2, 10);
+        int threadCount = TestUtil.nextInt(r, 2, 6);
         Thread[] threads = new Thread[threadCount];
         final CountDownLatch startingGun = new CountDownLatch(1);
         for (int tid=0; tid < threadCount; tid++) {
@@ -102,7 +102,7 @@ public abstract class AbstractCompressedStreamTests extends ESTestCase {
 
     public void testLineDocsThreads() throws Exception {
         final Random r = getRandom();
-        int threadCount = TestUtil.nextInt(r, 2, 10);
+        int threadCount = TestUtil.nextInt(r, 2, 6);
         Thread[] threads = new Thread[threadCount];
         final CountDownLatch startingGun = new CountDownLatch(1);
         for (int tid=0; tid < threadCount; tid++) {
@@ -162,7 +162,7 @@ public abstract class AbstractCompressedStreamTests extends ESTestCase {
 
     public void testRepetitionsLThreads() throws Exception {
         final Random r = getRandom();
-        int threadCount = TestUtil.nextInt(r, 2, 10);
+        int threadCount = TestUtil.nextInt(r, 2, 6);
         Thread[] threads = new Thread[threadCount];
         final CountDownLatch startingGun = new CountDownLatch(1);
         for (int tid=0; tid < threadCount; tid++) {
@@ -226,7 +226,7 @@ public abstract class AbstractCompressedStreamTests extends ESTestCase {
 
     public void testRepetitionsIThreads() throws Exception {
         final Random r = getRandom();
-        int threadCount = TestUtil.nextInt(r, 2, 10);
+        int threadCount = TestUtil.nextInt(r, 2, 6);
         Thread[] threads = new Thread[threadCount];
         final CountDownLatch startingGun = new CountDownLatch(1);
         for (int tid=0; tid < threadCount; tid++) {
@@ -350,7 +350,7 @@ public abstract class AbstractCompressedStreamTests extends ESTestCase {
 
     public void testRepetitionsSThreads() throws Exception {
         final Random r = getRandom();
-        int threadCount = TestUtil.nextInt(r, 2, 10);
+        int threadCount = TestUtil.nextInt(r, 2, 6);
         Thread[] threads = new Thread[threadCount];
         final CountDownLatch startingGun = new CountDownLatch(1);
         for (int tid=0; tid < threadCount; tid++) {
diff --git a/core/src/test/java/org/elasticsearch/index/fielddata/AbstractStringFieldDataTests.java b/core/src/test/java/org/elasticsearch/index/fielddata/AbstractStringFieldDataTests.java
index 4d19f92097d..8fcc949936b 100644
--- a/core/src/test/java/org/elasticsearch/index/fielddata/AbstractStringFieldDataTests.java
+++ b/core/src/test/java/org/elasticsearch/index/fielddata/AbstractStringFieldDataTests.java
@@ -250,7 +250,7 @@ public abstract class AbstractStringFieldDataTests extends AbstractFieldDataImpl
         for (int i = 1; i < values.length; ++i) {
             values[i] = TestUtil.randomUnicodeString(getRandom());
         }
-        final int numDocs = scaledRandomIntBetween(10, 10000);
+        final int numDocs = scaledRandomIntBetween(10, 3072);
         for (int i = 0; i < numDocs; ++i) {
             final String value = RandomPicks.randomFrom(getRandom(), values);
             if (value == null) {
@@ -306,7 +306,7 @@ public abstract class AbstractStringFieldDataTests extends AbstractFieldDataImpl
         for (int i = 1; i < values.length; ++i) {
             values[i] = TestUtil.randomUnicodeString(getRandom());
         }
-        final int numDocs = scaledRandomIntBetween(10, 10000);
+        final int numDocs = scaledRandomIntBetween(10, 3072);
         for (int i = 0; i < numDocs; ++i) {
             final String value = RandomPicks.randomFrom(getRandom(), values);
             if (value == null) {
@@ -359,7 +359,7 @@ public abstract class AbstractStringFieldDataTests extends AbstractFieldDataImpl
         for (int i = 0; i < values.length; ++i) {
             values[i] = TestUtil.randomSimpleString(getRandom());
         }
-        final int numParents = scaledRandomIntBetween(10, 10000);
+        final int numParents = scaledRandomIntBetween(10, 3072);
         List<Document> docs = new ArrayList<>();
         FixedBitSet parents = new FixedBitSet(64);
         for (int i = 0; i < numParents; ++i) {
diff --git a/core/src/test/java/org/elasticsearch/index/fielddata/DuelFieldDataTests.java b/core/src/test/java/org/elasticsearch/index/fielddata/DuelFieldDataTests.java
index 44147a2c362..3dee75021dc 100644
--- a/core/src/test/java/org/elasticsearch/index/fielddata/DuelFieldDataTests.java
+++ b/core/src/test/java/org/elasticsearch/index/fielddata/DuelFieldDataTests.java
@@ -66,7 +66,7 @@ public class DuelFieldDataTests extends AbstractFieldDataTests {
                 .endObject().endObject().endObject().string();
         final DocumentMapper mapper = mapperService.documentMapperParser().parse(mapping);
         Random random = getRandom();
-        int atLeast = scaledRandomIntBetween(1000, 1500);
+        int atLeast = scaledRandomIntBetween(200, 1500);
         for (int i = 0; i < atLeast; i++) {
             String s = Integer.toString(randomByte());
 
@@ -142,8 +142,8 @@ public class DuelFieldDataTests extends AbstractFieldDataTests {
 
         final DocumentMapper mapper = mapperService.documentMapperParser().parse(mapping);
         Random random = getRandom();
-        int atLeast = scaledRandomIntBetween(1000, 1500);
-        final int maxNumValues = randomBoolean() ? 1 : randomIntBetween(2, 40);
+        int atLeast = scaledRandomIntBetween(200, 1500);
+        final int maxNumValues = randomBoolean() ? 1 : randomIntBetween(2, 10);
         byte[] values = new byte[maxNumValues];
         for (int i = 0; i < atLeast; i++) {
             int numValues = randomInt(maxNumValues);
@@ -224,8 +224,8 @@ public class DuelFieldDataTests extends AbstractFieldDataTests {
 
         final DocumentMapper mapper = mapperService.documentMapperParser().parse(mapping);
         Random random = getRandom();
-        int atLeast = scaledRandomIntBetween(1000, 1500);
-        final int maxNumValues = randomBoolean() ? 1 : randomIntBetween(2, 40);
+        int atLeast = scaledRandomIntBetween(200, 1500);
+        final int maxNumValues = randomBoolean() ? 1 : randomIntBetween(2, 10);
         float[] values = new float[maxNumValues];
         for (int i = 0; i < atLeast; i++) {
             int numValues = randomInt(maxNumValues);
@@ -301,7 +301,7 @@ public class DuelFieldDataTests extends AbstractFieldDataTests {
     @Test
     public void testDuelStrings() throws Exception {
         Random random = getRandom();
-        int atLeast = scaledRandomIntBetween(1000, 1500);
+        int atLeast = scaledRandomIntBetween(200, 1500);
         for (int i = 0; i < atLeast; i++) {
             Document d = new Document();
             d.add(new StringField("_id", "" + i, Field.Store.NO));
@@ -407,8 +407,8 @@ public class DuelFieldDataTests extends AbstractFieldDataTests {
         final DocumentMapper mapper = mapperService.documentMapperParser().parse(mapping);
 
         Random random = getRandom();
-        int atLeast = scaledRandomIntBetween(1000, 1500);
-        int maxValuesPerDoc = randomBoolean() ? 1 : randomIntBetween(2, 40);
+        int atLeast = scaledRandomIntBetween(200, 1500);
+        int maxValuesPerDoc = randomBoolean() ? 1 : randomIntBetween(2, 10);
         // to test deduplication
         double defaultLat = randomDouble() * 180 - 90;
         double defaultLon = randomDouble() * 360 - 180;