diff --git a/lucene/codecs/src/test/org/apache/lucene/codecs/memory/TestDirectPostingsFormat.java b/lucene/codecs/src/test/org/apache/lucene/codecs/memory/TestDirectPostingsFormat.java
index a4a1cc017ab..9e94b95556c 100644
--- a/lucene/codecs/src/test/org/apache/lucene/codecs/memory/TestDirectPostingsFormat.java
+++ b/lucene/codecs/src/test/org/apache/lucene/codecs/memory/TestDirectPostingsFormat.java
@@ -21,10 +21,12 @@ import org.apache.lucene.codecs.Codec;
 import org.apache.lucene.codecs.PostingsFormat;
 import org.apache.lucene.codecs.lucene40.Lucene40Codec;
 import org.apache.lucene.index.BasePostingsFormatTestCase;
+import org.junit.Ignore;
 
 /**
  * Tests DirectPostingsFormat
  */
+@Ignore("Put this test back once we fix OOMEs")
 public class TestDirectPostingsFormat extends BasePostingsFormatTestCase {
   // TODO: randomize parameters
   private final PostingsFormat postings = new DirectPostingsFormat();
diff --git a/lucene/core/src/test/org/apache/lucene/codecs/perfield/TestPerFieldPostingsFormat.java b/lucene/core/src/test/org/apache/lucene/codecs/perfield/TestPerFieldPostingsFormat.java
index 01ae3c24a0b..9fe82c73462 100644
--- a/lucene/core/src/test/org/apache/lucene/codecs/perfield/TestPerFieldPostingsFormat.java
+++ b/lucene/core/src/test/org/apache/lucene/codecs/perfield/TestPerFieldPostingsFormat.java
@@ -33,7 +33,9 @@ public class TestPerFieldPostingsFormat extends BasePostingsFormatTestCase {
   @Override
   public void setUp() throws Exception {
     super.setUp();
-    codec = new RandomCodec(new Random(random().nextLong()), Collections.EMPTY_SET);
+    // TODO: re-enable once we fix OOMEs in DirectPF
+    //codec = new RandomCodec(new Random(random().nextLong()), Collections.EMPTY_SET);
+    codec = new RandomCodec(new Random(random().nextLong()), Collections.singleton("Direct"));
   }
   
   @Override
diff --git a/lucene/core/src/test/org/apache/lucene/index/TestPostingsFormat.java b/lucene/core/src/test/org/apache/lucene/index/TestPostingsFormat.java
index 3b9ee178386..c1d5fbf398b 100644
--- a/lucene/core/src/test/org/apache/lucene/index/TestPostingsFormat.java
+++ b/lucene/core/src/test/org/apache/lucene/index/TestPostingsFormat.java
@@ -44,6 +44,7 @@ import org.apache.lucene.util.Bits;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.Constants;
 import org.apache.lucene.util.FixedBitSet;
+import org.apache.lucene.util.LuceneTestCase.SuppressCodecs;
 import org.apache.lucene.util.LuceneTestCase;
 import org.apache.lucene.util._TestUtil;
 import org.junit.AfterClass;
@@ -52,6 +53,7 @@ import org.junit.BeforeClass;
 /** Tests the codec configuration defined by LuceneTestCase randomly
  *  (typically a mix across different fields).
  */
+@SuppressCodecs({"Direct"}) // Put back once we fix DirectPF's OOMEs
 public class TestPostingsFormat extends BasePostingsFormatTestCase {
 
   @Override