diff --git a/utils_test.go b/utils_test.go
index 48c9b71..3f9762b 100644
--- a/utils_test.go
+++ b/utils_test.go
@@ -3,6 +3,38 @@ package pagser
 import "testing"
 
 func TestToInt32SliceE(t *testing.T) {
+	_, err := toInt32SliceE(nil)
+	if err == nil {
+		t.Fatal("nil not return error")
+	}
+
+	_, err = toInt32SliceE(1)
+	if err == nil {
+		t.Fatal("1 not return error")
+	}
+
+	list := []int32{1, 2, 3}
+	out, err := toInt32SliceE(list)
+	t.Logf("out: %v, error: %v", out, err)
+}
+
+func TestToInt64SliceE(t *testing.T) {
+	_, err := toInt64SliceE(nil)
+	if err == nil {
+		t.Fatal("nil not return error")
+	}
+
+	_, err = toInt64SliceE(1)
+	if err == nil {
+		t.Fatal("1 not return error")
+	}
+
+	list := []int64{1, 2, 3}
+	out, err := toInt64SliceE(list)
+	t.Logf("out: %v, error: %v", out, err)
+}
+
+func TestToFloat32SliceE(t *testing.T) {
 	_, err := toFloat32SliceE(nil)
 	if err == nil {
 		t.Fatal("nil not return error")
@@ -13,8 +45,23 @@ func TestToInt32SliceE(t *testing.T) {
 		t.Fatal("1 not return error")
 	}
 
-	arrs := []int32{1, 2, 3}
-	out, err := toFloat32SliceE(arrs)
+	list := []float32{1, 2, 3}
+	out, err := toFloat32SliceE(list)
 	t.Logf("out: %v, error: %v", out, err)
+}
+
+func TestToFloat64SliceE(t *testing.T) {
+	_, err := toFloat64SliceE(nil)
+	if err == nil {
+		t.Fatal("nil not return error")
+	}
+
+	_, err = toFloat64SliceE(1)
+	if err == nil {
+		t.Fatal("1 not return error")
+	}
 
+	list := []float64{1, 2, 3}
+	out, err := toFloat64SliceE(list)
+	t.Logf("out: %v, error: %v", out, err)
 }