diff --git a/pkg/client/cache/fifo.go b/pkg/client/cache/fifo.go
index 59d6e7b70b8..9803810270b 100644
--- a/pkg/client/cache/fifo.go
+++ b/pkg/client/cache/fifo.go
@@ -72,10 +72,10 @@ func (f *FIFO) List() []interface{} {
 	return list
 }
 
-// Contains returns a util.StringSet containing all IDs of stored the items.
+// ContainedIDs returns a util.StringSet containing all IDs of stored the items.
 // This is a snapshot of a moment in time, and one should keep in mind that
 // other go routines can add or remove items after you call this.
-func (c *FIFO) Contains() util.StringSet {
+func (c *FIFO) ContainedIDs() util.StringSet {
 	c.lock.RLock()
 	defer c.lock.RUnlock()
 	set := util.StringSet{}
diff --git a/pkg/client/cache/poller.go b/pkg/client/cache/poller.go
index d2c379b7868..70fec9361da 100644
--- a/pkg/client/cache/poller.go
+++ b/pkg/client/cache/poller.go
@@ -68,7 +68,7 @@ func (p *Poller) Run() {
 }
 
 func (p *Poller) sync(e Enumerator) {
-	current := p.store.Contains()
+	current := p.store.ContainedIDs()
 	for i := 0; i < e.Len(); i++ {
 		id, object := e.Get(i)
 		p.store.Update(id, object)
diff --git a/pkg/client/cache/poller_test.go b/pkg/client/cache/poller_test.go
index 5ebfc21f260..92a75f2f620 100644
--- a/pkg/client/cache/poller_test.go
+++ b/pkg/client/cache/poller_test.go
@@ -70,7 +70,7 @@ func TestPoller_sync(t *testing.T) {
 		for line, pairs := range item.steps {
 			p.sync(testEnumerator(pairs))
 
-			ids := s.Contains()
+			ids := s.ContainedIDs()
 			for _, pair := range pairs {
 				if !ids.Has(pair.id) {
 					t.Errorf("%v, %v: expected to find entry for %v, but did not.", testCase, line, pair.id)
@@ -113,7 +113,7 @@ func TestPoller_Run(t *testing.T) {
 	<-done
 
 	// We never added anything, verify that.
-	if e, a := 0, len(s.Contains()); e != a {
+	if e, a := 0, len(s.ContainedIDs()); e != a {
 		t.Errorf("expected %v, got %v", e, a)
 	}
 }
diff --git a/pkg/client/cache/store.go b/pkg/client/cache/store.go
index ebf0a2ce953..2c9fea4c2c7 100644
--- a/pkg/client/cache/store.go
+++ b/pkg/client/cache/store.go
@@ -31,7 +31,7 @@ type Store interface {
 	Update(id string, obj interface{})
 	Delete(id string)
 	List() []interface{}
-	Contains() util.StringSet
+	ContainedIDs() util.StringSet
 	Get(id string) (item interface{}, exists bool)
 
 	// Replace will delete the contents of the store, using instead the
@@ -78,10 +78,10 @@ func (c *cache) List() []interface{} {
 	return list
 }
 
-// Contains returns a util.StringSet containing all IDs of stored the items.
+// ContainedIDs returns a util.StringSet containing all IDs of stored the items.
 // This is a snapshot of a moment in time, and one should keep in mind that
 // other go routines can add or remove items after you call this.
-func (c *cache) Contains() util.StringSet {
+func (c *cache) ContainedIDs() util.StringSet {
 	c.lock.RLock()
 	defer c.lock.RUnlock()
 	set := util.StringSet{}
diff --git a/pkg/client/cache/store_test.go b/pkg/client/cache/store_test.go
index 7e9af6eef91..f758333b657 100644
--- a/pkg/client/cache/store_test.go
+++ b/pkg/client/cache/store_test.go
@@ -62,7 +62,7 @@ func doTestStore(t *testing.T, store Store) {
 		}
 
 		// Check that ID list is correct.
-		ids := store.Contains()
+		ids := store.ContainedIDs()
 		if !ids.HasAll("a", "c", "e") {
 			t.Errorf("missing items")
 		}
@@ -90,7 +90,7 @@ func doTestStore(t *testing.T, store Store) {
 		}
 
 		// Check that ID list is correct.
-		ids := store.Contains()
+		ids := store.ContainedIDs()
 		if !ids.HasAll("foo", "bar") {
 			t.Errorf("missing items")
 		}
diff --git a/plugin/pkg/scheduler/factory/factory.go b/plugin/pkg/scheduler/factory/factory.go
index a243ed410ff..122636939ee 100644
--- a/plugin/pkg/scheduler/factory/factory.go
+++ b/plugin/pkg/scheduler/factory/factory.go
@@ -95,7 +95,7 @@ func (factory *ConfigFactory) Create() *scheduler.Config {
 			glog.V(2).Infof("About to try and schedule pod %v\n"+
 				"\tknown minions: %v\n"+
 				"\tknown scheduled pods: %v\n",
-				pod.Name, minionCache.Contains(), podCache.Contains())
+				pod.Name, minionCache.ContainedIDs(), podCache.ContainedIDs())
 			return pod
 		},
 		Error: factory.makeDefaultErrorFunc(&podBackoff, podQueue),