diff --git a/swarm/network/kademlia.go b/swarm/network/kademlia.go
index c35d55e834..3214e151d1 100644
--- a/swarm/network/kademlia.go
+++ b/swarm/network/kademlia.go
@@ -684,7 +684,10 @@ func (k *Kademlia) saturation() int {
 func (k *Kademlia) knowNeighbours(addrs [][]byte) (got bool, n int, missing [][]byte) {
 	pm := make(map[string]bool)
 	depth := depthForPot(k.conns, k.MinProxBinSize, k.base)
+	// create a map with all peers at depth and deeper known in the kademlia
 	k.eachAddr(nil, 255, func(p *BzzAddr, po int) bool {
+		// in order deepest to shallowest compared to the kademlia base address
+		// all bins (except self) are included (0 <= bin <= 255)
 		if po < depth {
 			return false
 		}
diff --git a/swarm/network/stream/snapshot_sync_test.go b/swarm/network/stream/snapshot_sync_test.go
index 8ee7fd2edf..7a883644b9 100644
--- a/swarm/network/stream/snapshot_sync_test.go
+++ b/swarm/network/stream/snapshot_sync_test.go
@@ -76,7 +76,6 @@ func dummyRequestFromPeers(_ context.Context, req *network.Request) (*enode.ID,
 //they are expected to store based on the syncing protocol.
 //Number of chunks and nodes can be provided via commandline too.
 func TestSyncingViaGlobalSync(t *testing.T) {
-	t.Skip("not working")
 	if runtime.GOOS == "darwin" && os.Getenv("TRAVIS") == "true" {
 		t.Skip("Flaky on mac on travis")
 	}
@@ -108,7 +107,6 @@ func TestSyncingViaGlobalSync(t *testing.T) {
 }
 
 func TestSyncingViaDirectSubscribe(t *testing.T) {
-	t.Skip("not working")
 	if runtime.GOOS == "darwin" && os.Getenv("TRAVIS") == "true" {
 		t.Skip("Flaky on mac on travis")
 	}