diff --git a/.travis.yml b/.travis.yml
index 4acd00bc9f..c992451c4f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -34,6 +34,16 @@ jobs:
     # These are the latest Go versions.
     - stage: build
       os: linux
+      arch: amd64
+      dist: xenial
+      go: 1.13.x
+      script:
+        - go run build/ci.go install
+        - go run build/ci.go test -coverage $TEST_PACKAGES
+
+    - stage: build
+      os: linux
+      arch: arm64
       dist: xenial
       go: 1.13.x
       script:
diff --git a/consensus/ethash/ethash_test.go b/consensus/ethash/ethash_test.go
index 90cb6470f7..fdfd81320f 100644
--- a/consensus/ethash/ethash_test.go
+++ b/consensus/ethash/ethash_test.go
@@ -49,7 +49,7 @@ func TestTestMode(t *testing.T) {
 		if err := ethash.VerifySeal(nil, header); err != nil {
 			t.Fatalf("unexpected verification error: %v", err)
 		}
-	case <-time.NewTimer(time.Second).C:
+	case <-time.NewTimer(2 * time.Second).C:
 		t.Error("sealing result timeout")
 	}
 }
diff --git a/eth/handler_test.go b/eth/handler_test.go
index 256883d1f0..05ddca3efd 100644
--- a/eth/handler_test.go
+++ b/eth/handler_test.go
@@ -608,7 +608,7 @@ func testBroadcastBlock(t *testing.T, totalPeers, broadcastExpected int) {
 			}
 		}(peer)
 	}
-	timeout := time.After(300 * time.Millisecond)
+	timeout := time.After(time.Second)
 	var receivedCount int
 outer:
 	for {
diff --git a/metrics/doc.go b/metrics/doc.go
new file mode 100644
index 0000000000..13f429c168
--- /dev/null
+++ b/metrics/doc.go
@@ -0,0 +1,4 @@
+package metrics
+
+const epsilon = 0.0000000000000001
+const epsilonPercentile = .00000000001
diff --git a/metrics/ewma_test.go b/metrics/ewma_test.go
index 0430fbd247..5b24419161 100644
--- a/metrics/ewma_test.go
+++ b/metrics/ewma_test.go
@@ -1,6 +1,9 @@
 package metrics
 
-import "testing"
+import (
+	"math"
+	"testing"
+)
 
 func BenchmarkEWMA(b *testing.B) {
 	a := NewEWMA1()
@@ -15,67 +18,67 @@ func TestEWMA1(t *testing.T) {
 	a := NewEWMA1()
 	a.Update(3)
 	a.Tick()
-	if rate := a.Rate(); 0.6 != rate {
+	if rate := a.Rate(); math.Abs(0.6-rate) > epsilon {
 		t.Errorf("initial a.Rate(): 0.6 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.22072766470286553 != rate {
+	if rate := a.Rate(); math.Abs(0.22072766470286553-rate) > epsilon {
 		t.Errorf("1 minute a.Rate(): 0.22072766470286553 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.08120116994196772 != rate {
+	if rate := a.Rate(); math.Abs(0.08120116994196772-rate) > epsilon {
 		t.Errorf("2 minute a.Rate(): 0.08120116994196772 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.029872241020718428 != rate {
+	if rate := a.Rate(); math.Abs(0.029872241020718428-rate) > epsilon {
 		t.Errorf("3 minute a.Rate(): 0.029872241020718428 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.01098938333324054 != rate {
+	if rate := a.Rate(); math.Abs(0.01098938333324054-rate) > epsilon {
 		t.Errorf("4 minute a.Rate(): 0.01098938333324054 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.004042768199451294 != rate {
+	if rate := a.Rate(); math.Abs(0.004042768199451294-rate) > epsilon {
 		t.Errorf("5 minute a.Rate(): 0.004042768199451294 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.0014872513059998212 != rate {
+	if rate := a.Rate(); math.Abs(0.0014872513059998212-rate) > epsilon {
 		t.Errorf("6 minute a.Rate(): 0.0014872513059998212 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.0005471291793327122 != rate {
+	if rate := a.Rate(); math.Abs(0.0005471291793327122-rate) > epsilon {
 		t.Errorf("7 minute a.Rate(): 0.0005471291793327122 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.00020127757674150815 != rate {
+	if rate := a.Rate(); math.Abs(0.00020127757674150815-rate) > epsilon {
 		t.Errorf("8 minute a.Rate(): 0.00020127757674150815 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 7.404588245200814e-05 != rate {
+	if rate := a.Rate(); math.Abs(7.404588245200814e-05-rate) > epsilon {
 		t.Errorf("9 minute a.Rate(): 7.404588245200814e-05 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 2.7239957857491083e-05 != rate {
+	if rate := a.Rate(); math.Abs(2.7239957857491083e-05-rate) > epsilon {
 		t.Errorf("10 minute a.Rate(): 2.7239957857491083e-05 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 1.0021020474147462e-05 != rate {
+	if rate := a.Rate(); math.Abs(1.0021020474147462e-05-rate) > epsilon {
 		t.Errorf("11 minute a.Rate(): 1.0021020474147462e-05 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 3.6865274119969525e-06 != rate {
+	if rate := a.Rate(); math.Abs(3.6865274119969525e-06-rate) > epsilon {
 		t.Errorf("12 minute a.Rate(): 3.6865274119969525e-06 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 1.3561976441886433e-06 != rate {
+	if rate := a.Rate(); math.Abs(1.3561976441886433e-06-rate) > epsilon {
 		t.Errorf("13 minute a.Rate(): 1.3561976441886433e-06 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 4.989172314621449e-07 != rate {
+	if rate := a.Rate(); math.Abs(4.989172314621449e-07-rate) > epsilon {
 		t.Errorf("14 minute a.Rate(): 4.989172314621449e-07 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 1.8354139230109722e-07 != rate {
+	if rate := a.Rate(); math.Abs(1.8354139230109722e-07-rate) > epsilon {
 		t.Errorf("15 minute a.Rate(): 1.8354139230109722e-07 != %v\n", rate)
 	}
 }
@@ -84,67 +87,67 @@ func TestEWMA5(t *testing.T) {
 	a := NewEWMA5()
 	a.Update(3)
 	a.Tick()
-	if rate := a.Rate(); 0.6 != rate {
+	if rate := a.Rate(); math.Abs(0.6-rate) > epsilon {
 		t.Errorf("initial a.Rate(): 0.6 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.49123845184678905 != rate {
+	if rate := a.Rate(); math.Abs(0.49123845184678905-rate) > epsilon {
 		t.Errorf("1 minute a.Rate(): 0.49123845184678905 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.4021920276213837 != rate {
+	if rate := a.Rate(); math.Abs(0.4021920276213837-rate) > epsilon {
 		t.Errorf("2 minute a.Rate(): 0.4021920276213837 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.32928698165641596 != rate {
+	if rate := a.Rate(); math.Abs(0.32928698165641596-rate) > epsilon {
 		t.Errorf("3 minute a.Rate(): 0.32928698165641596 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.269597378470333 != rate {
+	if rate := a.Rate(); math.Abs(0.269597378470333-rate) > epsilon {
 		t.Errorf("4 minute a.Rate(): 0.269597378470333 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.2207276647028654 != rate {
+	if rate := a.Rate(); math.Abs(0.2207276647028654-rate) > epsilon {
 		t.Errorf("5 minute a.Rate(): 0.2207276647028654 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.18071652714732128 != rate {
+	if rate := a.Rate(); math.Abs(0.18071652714732128-rate) > epsilon {
 		t.Errorf("6 minute a.Rate(): 0.18071652714732128 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.14795817836496392 != rate {
+	if rate := a.Rate(); math.Abs(0.14795817836496392-rate) > epsilon {
 		t.Errorf("7 minute a.Rate(): 0.14795817836496392 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.12113791079679326 != rate {
+	if rate := a.Rate(); math.Abs(0.12113791079679326-rate) > epsilon {
 		t.Errorf("8 minute a.Rate(): 0.12113791079679326 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.09917933293295193 != rate {
+	if rate := a.Rate(); math.Abs(0.09917933293295193-rate) > epsilon {
 		t.Errorf("9 minute a.Rate(): 0.09917933293295193 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.08120116994196763 != rate {
+	if rate := a.Rate(); math.Abs(0.08120116994196763-rate) > epsilon {
 		t.Errorf("10 minute a.Rate(): 0.08120116994196763 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.06648189501740036 != rate {
+	if rate := a.Rate(); math.Abs(0.06648189501740036-rate) > epsilon {
 		t.Errorf("11 minute a.Rate(): 0.06648189501740036 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.05443077197364752 != rate {
+	if rate := a.Rate(); math.Abs(0.05443077197364752-rate) > epsilon {
 		t.Errorf("12 minute a.Rate(): 0.05443077197364752 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.04456414692860035 != rate {
+	if rate := a.Rate(); math.Abs(0.04456414692860035-rate) > epsilon {
 		t.Errorf("13 minute a.Rate(): 0.04456414692860035 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.03648603757513079 != rate {
+	if rate := a.Rate(); math.Abs(0.03648603757513079-rate) > epsilon {
 		t.Errorf("14 minute a.Rate(): 0.03648603757513079 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.0298722410207183831020718428 != rate {
+	if rate := a.Rate(); math.Abs(0.0298722410207183831020718428-rate) > epsilon {
 		t.Errorf("15 minute a.Rate(): 0.0298722410207183831020718428 != %v\n", rate)
 	}
 }
@@ -153,67 +156,67 @@ func TestEWMA15(t *testing.T) {
 	a := NewEWMA15()
 	a.Update(3)
 	a.Tick()
-	if rate := a.Rate(); 0.6 != rate {
+	if rate := a.Rate(); math.Abs(0.6-rate) > epsilon {
 		t.Errorf("initial a.Rate(): 0.6 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.5613041910189706 != rate {
+	if rate := a.Rate(); math.Abs(0.5613041910189706-rate) > epsilon {
 		t.Errorf("1 minute a.Rate(): 0.5613041910189706 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.5251039914257684 != rate {
+	if rate := a.Rate(); math.Abs(0.5251039914257684-rate) > epsilon {
 		t.Errorf("2 minute a.Rate(): 0.5251039914257684 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.4912384518467888184678905 != rate {
+	if rate := a.Rate(); math.Abs(0.4912384518467888184678905-rate) > epsilon {
 		t.Errorf("3 minute a.Rate(): 0.4912384518467888184678905 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.459557003018789 != rate {
+	if rate := a.Rate(); math.Abs(0.459557003018789-rate) > epsilon {
 		t.Errorf("4 minute a.Rate(): 0.459557003018789 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.4299187863442732 != rate {
+	if rate := a.Rate(); math.Abs(0.4299187863442732-rate) > epsilon {
 		t.Errorf("5 minute a.Rate(): 0.4299187863442732 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.4021920276213831 != rate {
+	if rate := a.Rate(); math.Abs(0.4021920276213831-rate) > epsilon {
 		t.Errorf("6 minute a.Rate(): 0.4021920276213831 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.37625345116383313 != rate {
+	if rate := a.Rate(); math.Abs(0.37625345116383313-rate) > epsilon {
 		t.Errorf("7 minute a.Rate(): 0.37625345116383313 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.3519877317060185 != rate {
+	if rate := a.Rate(); math.Abs(0.3519877317060185-rate) > epsilon {
 		t.Errorf("8 minute a.Rate(): 0.3519877317060185 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.3292869816564153165641596 != rate {
+	if rate := a.Rate(); math.Abs(0.3292869816564153165641596-rate) > epsilon {
 		t.Errorf("9 minute a.Rate(): 0.3292869816564153165641596 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.3080502714195546 != rate {
+	if rate := a.Rate(); math.Abs(0.3080502714195546-rate) > epsilon {
 		t.Errorf("10 minute a.Rate(): 0.3080502714195546 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.2881831806538789 != rate {
+	if rate := a.Rate(); math.Abs(0.2881831806538789-rate) > epsilon {
 		t.Errorf("11 minute a.Rate(): 0.2881831806538789 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.26959737847033216 != rate {
+	if rate := a.Rate(); math.Abs(0.26959737847033216-rate) > epsilon {
 		t.Errorf("12 minute a.Rate(): 0.26959737847033216 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.2522102307052083 != rate {
+	if rate := a.Rate(); math.Abs(0.2522102307052083-rate) > epsilon {
 		t.Errorf("13 minute a.Rate(): 0.2522102307052083 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.23594443252115815 != rate {
+	if rate := a.Rate(); math.Abs(0.23594443252115815-rate) > epsilon {
 		t.Errorf("14 minute a.Rate(): 0.23594443252115815 != %v\n", rate)
 	}
 	elapseMinute(a)
-	if rate := a.Rate(); 0.2207276647028646247028654470286553 != rate {
+	if rate := a.Rate(); math.Abs(0.2207276647028646247028654470286553-rate) > epsilon {
 		t.Errorf("15 minute a.Rate(): 0.2207276647028646247028654470286553 != %v\n", rate)
 	}
 }
diff --git a/metrics/sample_test.go b/metrics/sample_test.go
index d60e99c5bb..7bab0e3de8 100644
--- a/metrics/sample_test.go
+++ b/metrics/sample_test.go
@@ -1,6 +1,7 @@
 package metrics
 
 import (
+	"math"
 	"math/rand"
 	"runtime"
 	"testing"
@@ -326,7 +327,7 @@ func testUniformSampleStatistics(t *testing.T, s Sample) {
 	if 7380.5 != ps[1] {
 		t.Errorf("75th percentile: 7380.5 != %v\n", ps[1])
 	}
-	if 9986.429999999998 != ps[2] {
+	if math.Abs(9986.429999999998-ps[2]) > epsilonPercentile {
 		t.Errorf("99th percentile: 9986.429999999998 != %v\n", ps[2])
 	}
 }
diff --git a/miner/worker_test.go b/miner/worker_test.go
index faebee1a72..34f17e8a24 100644
--- a/miner/worker_test.go
+++ b/miner/worker_test.go
@@ -340,7 +340,9 @@ func testEmptyWork(t *testing.T, chainConfig *params.ChainConfig, engine consens
 		}
 	}
 	w.fullTaskHook = func() {
-		time.Sleep(100 * time.Millisecond)
+		// Aarch64 unit tests are running in a VM on travis, they must
+		// be given more time to execute.
+		time.Sleep(time.Second)
 	}
 
 	// Ensure worker has finished initialization
@@ -355,7 +357,7 @@ func testEmptyWork(t *testing.T, chainConfig *params.ChainConfig, engine consens
 	for i := 0; i < 2; i += 1 {
 		select {
 		case <-taskCh:
-		case <-time.NewTimer(2 * time.Second).C:
+		case <-time.NewTimer(4 * time.Second).C:
 			t.Error("new task timeout")
 		}
 	}