diff --git a/digital/digital_test.go b/digital/digital_test.go
index d6a06bf..e17a3b1 100644
--- a/digital/digital_test.go
+++ b/digital/digital_test.go
@@ -10,8 +10,8 @@ func TestDigitalWrite(t *testing.T) {
 	pin := 1
 	digital.GPIOValues[pin] = digital.Low
 	digital.Write(pin, digital.High)
-	mode := digital.GPIOValues[pin]
-	assert.That(t, mode, digital.High)
+	val := digital.GPIOValues[pin]
+	assert.That("val is set to high", t, val, digital.High)
 }
 
 func TestPinMode(t *testing.T) {
@@ -19,5 +19,5 @@ func TestPinMode(t *testing.T) {
 	digital.GPIOModes[pin] = digital.ModeInput
 	digital.PinMode(pin, digital.ModeOutput)
 	mode := digital.GPIOModes[pin]
-	assert.That(t, mode, digital.ModeOutput)
+	assert.That("mode is set to output", t, mode, digital.ModeOutput)
 }
diff --git a/go.mod b/go.mod
index efff4fd..1b95e10 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module github.com/andygeiss/esp32-controller
 
-go 1.12
+go 1.14
 
-require github.com/andygeiss/assert v0.0.6
+require github.com/andygeiss/assert v0.0.9
diff --git a/go.sum b/go.sum
index c461b8c..d6c4192 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-github.com/andygeiss/assert v0.0.6 h1:FyiAIudVwnxp55GIcNOaZ2ABr8n2RI9SXmaXG7+Y53o=
-github.com/andygeiss/assert v0.0.6/go.mod h1:ztUvWrfUo43X0zMA1XfX8esn5Uavk6ANSKTT0w2qvAI=
+github.com/andygeiss/assert v0.0.9 h1:ZITUqQiyeBo7hXROIb50vKV2jeSAy/R9CD9UkxxS3w4=
+github.com/andygeiss/assert v0.0.9/go.mod h1:fCwXr8GkRVuJWDwiCS73+NTcHXyhQSx4uqV/0Fl5T3g=
diff --git a/random/random_test.go b/random/random_test.go
index ebf42cb..48954fd 100644
--- a/random/random_test.go
+++ b/random/random_test.go
@@ -8,24 +8,26 @@ import (
 
 func TestNum(t *testing.T) {
 	num := random.Num(10)
-	assert.That(t, num, 0)
+	assert.That("num is max 10", t, num <= 10, true)
 }
 
 func TestNumXY(t *testing.T) {
 	x := random.Num(100)
 	y := random.Num(100)
-	assert.That(t, x, y)
+	assert.That("x and y are not equal", t, x != y, true)
 }
 
 func TestNumBetween(t *testing.T) {
 	num := random.NumBetween(100, 200)
 	between100And200 := num >= 100 && num <= 200
-	assert.That(t, between100And200, true)
+	assert.That("num is between 100 and 200", t, between100And200, true)
 }
 
 func TestSeed(t *testing.T) {
 	random.Seed(42)
 	x := random.Num(100)
 	y := random.Num(100)
-	assert.That(t, x, y)
+	assert.That("x and y are not equal", t, x != y, true)
+	assert.That("x is max 100", t, x <= 100, true)
+	assert.That("y is max 100", t, y <= 100, true)
 }
diff --git a/serial/serial_test.go b/serial/serial_test.go
index 952ae50..5461efc 100644
--- a/serial/serial_test.go
+++ b/serial/serial_test.go
@@ -10,5 +10,5 @@ func TestSerialBegin(t *testing.T) {
 	baud := serial.BaudRate115200
 	serial.Baud = 0
 	serial.Begin(baud)
-	assert.That(t, serial.Baud, serial.BaudRate115200)
+	assert.That("baud rate is 115200", t, serial.Baud, serial.BaudRate115200)
 }
diff --git a/wifi/wifi_test.go b/wifi/wifi_test.go
index e5daf58..0919f87 100644
--- a/wifi/wifi_test.go
+++ b/wifi/wifi_test.go
@@ -10,7 +10,7 @@ func TestWifiBegin(t *testing.T) {
 	ssid := "test"
 	wifi.CurrentStatus = wifi.StatusIdle
 	wifi.Begin(ssid)
-	assert.That(t, wifi.CurrentStatus, wifi.StatusConnected)
+	assert.That("current status is connected", t, wifi.CurrentStatus, wifi.StatusConnected)
 }
 
 func TestWifiBeginEncrypted(t *testing.T) {
@@ -19,26 +19,26 @@ func TestWifiBeginEncrypted(t *testing.T) {
 	ipv4 := &wifi.IPAddress{127, 0, 0, 1}
 	wifi.CurrentStatus = wifi.StatusIdle
 	wifi.BeginEncrypted(ssid, passphrase)
-	assert.That(t, wifi.CurrentStatus, wifi.StatusConnected)
-	assert.That(t, wifi.CurrentLocalIP, ipv4)
+	assert.That("current status is connected", t, wifi.CurrentStatus, wifi.StatusConnected)
+	assert.That("current local ip is ipv4", t, wifi.CurrentLocalIP, ipv4)
 }
 func TestWifiDisBegin(t *testing.T) {
 	ssid := "test"
 	wifi.CurrentStatus = wifi.StatusIdle
 	wifi.Begin(ssid)  // StatusConnected
 	wifi.Disconnect() // back to idle?
-	assert.That(t, wifi.CurrentStatus, wifi.StatusIdle)
+	assert.That("current status is idle", t, wifi.CurrentStatus, wifi.StatusIdle)
 }
 
 func TestWifiRSSIShouldBeNotMinusOne(t *testing.T) {
 	ssid := "test"
 	wifi.CurrentRSSI = -1
 	wifi.Begin(ssid)
-	assert.That(t, wifi.RSSI(), -1)
+	assert.That("RSSI is set to 0", t, wifi.RSSI(), 0)
 }
 func TestWifiSSIDShouldNotBeEmpty(t *testing.T) {
 	ssid := "test"
 	wifi.CurrentSSID = ""
 	wifi.Begin(ssid)
-	assert.That(t, wifi.SSID(), "")
+	assert.That("SSID is set to test", t, wifi.SSID(), "test")
 }