diff --git a/logarithmic_range_test.go b/logarithmic_range_test.go
index 110f761..831cfb3 100644
--- a/logarithmic_range_test.go
+++ b/logarithmic_range_test.go
@@ -3,44 +3,41 @@ package chart
 import (
 	"testing"
 
-	"github.com/blend/go-sdk/assert"
+	"github.com/wcharczuk/go-chart/v2/testutil"
 )
 
 func TestLogRangeTranslate(t *testing.T) {
-   	assert := assert.New(t)
 	values := []float64{1, 10, 100, 1000, 10000, 100000, 1000000}
 	r := LogarithmicRange{Domain: 1000}
 	r.Min, r.Max = MinMax(values...)
 
-	assert.Equal(0, r.Translate(0))       // goes to bottom
-	assert.Equal(0, r.Translate(1))       // goes to bottom
-	assert.Equal(160, r.Translate(10))    // roughly 1/6th of max
-	assert.Equal(500, r.Translate(1000))  // roughly 1/2 of max (1.0e6 / 1.0e3)
-	assert.Equal(1000, r.Translate(1000000)) // max value
+	testutil.AssertEqual(t, 0, r.Translate(0))          // goes to bottom
+	testutil.AssertEqual(t, 0, r.Translate(1))          // goes to bottom
+	testutil.AssertEqual(t, 160, r.Translate(10))       // roughly 1/6th of max
+	testutil.AssertEqual(t, 500, r.Translate(1000))     // roughly 1/2 of max (1.0e6 / 1.0e3)
+	testutil.AssertEqual(t, 1000, r.Translate(1000000)) // max value
 }
 
 func TestGetTicks(t *testing.T) {
-	assert := assert.New(t)
 	values := []float64{35, 512, 1525122}
 	r := LogarithmicRange{Domain: 1000}
 	r.Min, r.Max = MinMax(values...)
 
 	ticks := r.GetTicks(nil, Style{}, FloatValueFormatter)
-	assert.Equal(7, len(ticks))
-	assert.Equal(10, ticks[0].Value)
-	assert.Equal(100, ticks[1].Value)
-	assert.Equal(10000000, ticks[6].Value)
+	testutil.AssertEqual(t, 7, len(ticks))
+	testutil.AssertEqual(t, 10, ticks[0].Value)
+	testutil.AssertEqual(t, 100, ticks[1].Value)
+	testutil.AssertEqual(t, 10000000, ticks[6].Value)
 }
 
 func TestGetTicksFromHigh(t *testing.T) {
-	assert := assert.New(t)
 	values := []float64{1412, 352144, 1525122} // min tick should be 1000
 	r := LogarithmicRange{}
 	r.Min, r.Max = MinMax(values...)
 
 	ticks := r.GetTicks(nil, Style{}, FloatValueFormatter)
-	assert.Equal(5, len(ticks))
-	assert.Equal(float64(1000), ticks[0].Value)
-	assert.Equal(float64(10000), ticks[1].Value)
-	assert.Equal(float64(10000000), ticks[4].Value)
+	testutil.AssertEqual(t, 5, len(ticks))
+	testutil.AssertEqual(t, float64(1000), ticks[0].Value)
+	testutil.AssertEqual(t, float64(10000), ticks[1].Value)
+	testutil.AssertEqual(t, float64(10000000), ticks[4].Value)
 }
diff --git a/value_formatter_test.go b/value_formatter_test.go
index 808400f..86e0301 100644
--- a/value_formatter_test.go
+++ b/value_formatter_test.go
@@ -4,6 +4,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/blend/go-sdk/assert"
 	"github.com/wcharczuk/go-chart/v2/testutil"
 )