Index: oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentNodeStore.java
===================================================================
--- oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentNodeStore.java	(revision 1762454)
+++ oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/SegmentNodeStore.java	(working copy)
@@ -429,6 +429,12 @@
         return properties;
     }
 
+    @Nonnull
+    @Override
+    public Iterable<String> checkpoints() {
+        return getCheckpoints().getChildNodeNames();
+    }
+
     @Override @CheckForNull
     public NodeState retrieve(@Nonnull String checkpoint) {
         checkNotNull(checkpoint);
Index: oak-it/src/test/java/org/apache/jackrabbit/oak/spi/state/NodeStoreTest.java
===================================================================
--- oak-it/src/test/java/org/apache/jackrabbit/oak/spi/state/NodeStoreTest.java	(revision 1762454)
+++ oak-it/src/test/java/org/apache/jackrabbit/oak/spi/state/NodeStoreTest.java	(working copy)
@@ -555,7 +555,6 @@
 
     @Test
     public void checkpoints() throws Exception {
-        assumeTrue(fixture != NodeStoreFixtures.SEGMENT_TAR);
         int numCps = 3;
         Map<String, String> info = Maps.newHashMap();
         Set<String> cps = Sets.newHashSet();