diff --git a/grid_line_test.go b/grid_line_test.go
index 1d4f23a..d6e1fe6 100644
--- a/grid_line_test.go
+++ b/grid_line_test.go
@@ -10,10 +10,10 @@ func TestGenerateGridLines(t *testing.T) {
 	assert := assert.New(t)
 
 	ticks := []Tick{
-		Tick{Value: 1.0, Label: "1.0"},
-		Tick{Value: 2.0, Label: "2.0"},
-		Tick{Value: 3.0, Label: "3.0"},
-		Tick{Value: 4.0, Label: "4.0"},
+		{Value: 1.0, Label: "1.0"},
+		{Value: 2.0, Label: "2.0"},
+		{Value: 3.0, Label: "3.0"},
+		{Value: 4.0, Label: "4.0"},
 	}
 
 	gl := GenerateGridLines(ticks, true)