diff --git a/les/distributor.go b/les/distributor.go
index 62abef47dc..6d81149720 100644
--- a/les/distributor.go
+++ b/les/distributor.go
@@ -110,13 +110,15 @@ func (d *requestDistributor) registerTestPeer(p distPeer) {
 	d.peerLock.Unlock()
 }
 
-// distMaxWait is the maximum waiting time after which further necessary waiting
-// times are recalculated based on new feedback from the servers
-const distMaxWait = time.Millisecond * 50
+var (
+	// distMaxWait is the maximum waiting time after which further necessary waiting
+	// times are recalculated based on new feedback from the servers
+	distMaxWait = time.Millisecond * 50
 
-// waitForPeers is the time window in which a request does not fail even if it
-// has no suitable peers to send to at the moment
-const waitForPeers = time.Second * 3
+	// waitForPeers is the time window in which a request does not fail even if it
+	// has no suitable peers to send to at the moment
+	waitForPeers = time.Second * 3
+)
 
 // main event loop
 func (d *requestDistributor) loop() {
diff --git a/les/distributor_test.go b/les/distributor_test.go
index 00d43e1d6b..539c1aa7d7 100644
--- a/les/distributor_test.go
+++ b/les/distributor_test.go
@@ -86,8 +86,8 @@ func (p *testDistPeer) worker(t *testing.T, checkOrder bool, stop chan struct{})
 const (
 	testDistBufLimit       = 10000000
 	testDistMaxCost        = 1000000
-	testDistPeerCount      = 5
-	testDistReqCount       = 5000
+	testDistPeerCount      = 2
+	testDistReqCount       = 10
 	testDistMaxResendCount = 3
 )
 
@@ -128,6 +128,9 @@ func testRequestDistributor(t *testing.T, resend bool) {
 		go peers[i].worker(t, !resend, stop)
 		dist.registerTestPeer(peers[i])
 	}
+	// Disable the mechanism that we will wait a few time for request
+	// even there is no suitable peer to send right now.
+	waitForPeers = 0
 
 	var wg sync.WaitGroup
 
diff --git a/les/odr_test.go b/les/odr_test.go
index 17b963d480..7d10878226 100644
--- a/les/odr_test.go
+++ b/les/odr_test.go
@@ -193,6 +193,9 @@ func testOdr(t *testing.T, protocol int, expFail uint64, checkCached bool, fn od
 	if clientHead.Number.Uint64() != 4 {
 		t.Fatalf("Failed to sync the chain with server, head: %v", clientHead.Number.Uint64())
 	}
+	// Disable the mechanism that we will wait a few time for request
+	// even there is no suitable peer to send right now.
+	waitForPeers = 0
 
 	test := func(expFail uint64) {
 		// Mark this as a helper to put the failures at the correct lines
@@ -202,6 +205,8 @@ func testOdr(t *testing.T, protocol int, expFail uint64, checkCached bool, fn od
 			bhash := rawdb.ReadCanonicalHash(server.db, i)
 			b1 := fn(light.NoOdr, server.db, server.handler.server.chainConfig, server.handler.blockchain, nil, bhash)
 
+			// Set the timeout as 1 second here, ensure there is enough time
+			// for travis to make the action.
 			ctx, cancel := context.WithTimeout(context.Background(), time.Second)
 			b2 := fn(ctx, client.db, client.handler.backend.chainConfig, nil, client.handler.backend.blockchain, bhash)
 			cancel()
diff --git a/les/sync_test.go b/les/sync_test.go
index 7eef13d4ca..8df6223b84 100644
--- a/les/sync_test.go
+++ b/les/sync_test.go
@@ -89,7 +89,7 @@ func testCheckpointSyncing(t *testing.T, protocol int, syncMode int) {
 			for {
 				_, hash, _, err := server.handler.server.oracle.contract.Contract().GetLatestCheckpoint(nil)
 				if err != nil || hash == [32]byte{} {
-					time.Sleep(100 * time.Millisecond)
+					time.Sleep(10 * time.Millisecond)
 					continue
 				}
 				break
diff --git a/les/test_helper.go b/les/test_helper.go
index 67b0225fed..ee3d7a32e1 100644
--- a/les/test_helper.go
+++ b/les/test_helper.go
@@ -71,10 +71,10 @@ var (
 
 var (
 	// The block frequency for creating checkpoint(only used in test)
-	sectionSize = big.NewInt(512)
+	sectionSize = big.NewInt(128)
 
 	// The number of confirmations needed to generate a checkpoint(only used in test).
-	processConfirms = big.NewInt(4)
+	processConfirms = big.NewInt(1)
 
 	// The token bucket buffer limit for testing purpose.
 	testBufLimit = uint64(1000000)
diff --git a/light/postprocess.go b/light/postprocess.go
index 083dcfceb2..af3b257923 100644
--- a/light/postprocess.go
+++ b/light/postprocess.go
@@ -79,21 +79,21 @@ var (
 	}
 	// TestServerIndexerConfig wraps a set of configs as a test indexer config for server side.
 	TestServerIndexerConfig = &IndexerConfig{
-		ChtSize:           512,
-		ChtConfirms:       4,
-		BloomSize:         64,
-		BloomConfirms:     4,
-		BloomTrieSize:     512,
-		BloomTrieConfirms: 4,
+		ChtSize:           128,
+		ChtConfirms:       1,
+		BloomSize:         16,
+		BloomConfirms:     1,
+		BloomTrieSize:     128,
+		BloomTrieConfirms: 1,
 	}
 	// TestClientIndexerConfig wraps a set of configs as a test indexer config for client side.
 	TestClientIndexerConfig = &IndexerConfig{
-		ChtSize:           512,
-		ChtConfirms:       32,
-		BloomSize:         512,
-		BloomConfirms:     32,
-		BloomTrieSize:     512,
-		BloomTrieConfirms: 32,
+		ChtSize:           128,
+		ChtConfirms:       8,
+		BloomSize:         128,
+		BloomConfirms:     8,
+		BloomTrieSize:     128,
+		BloomTrieConfirms: 8,
 	}
 )