diff --git a/list_test.go b/list_test.go
new file mode 100644
index 0000000..aa515a3
--- /dev/null
+++ b/list_test.go
@@ -0,0 +1,98 @@
+package gp
+
+import (
+	"testing"
+)
+
+func TestMakeList(t *testing.T) {
+	tests := []struct {
+		name     string
+		args     []any
+		wantLen  int
+		wantVals []any
+	}{
+		{
+			name:     "empty list",
+			args:     []any{},
+			wantLen:  0,
+			wantVals: []any{},
+		},
+		{
+			name:     "integers",
+			args:     []any{1, 2, 3},
+			wantLen:  3,
+			wantVals: []any{1, 2, 3},
+		},
+		{
+			name:     "mixed types",
+			args:     []any{1, "hello", 3.14},
+			wantLen:  3,
+			wantVals: []any{1, "hello", 3.14},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			list := MakeList(tt.args...)
+
+			if got := list.Len(); got != tt.wantLen {
+				t.Errorf("MakeList() len = %v, want %v", got, tt.wantLen)
+			}
+
+			for i, want := range tt.wantVals {
+				got := list.GetItem(i).String()
+				if got != From(want).String() {
+					t.Errorf("MakeList() item[%d] = %v, want %v", i, got, want)
+				}
+			}
+		})
+	}
+}
+
+func TestList_SetItem(t *testing.T) {
+	list := MakeList(1, 2, 3)
+	list.SetItem(1, From("test"))
+
+	// Get the raw value without quotes for comparison
+	got := list.GetItem(1).String()
+
+	if got != "test" {
+		t.Errorf("List.SetItem() = %v, want %v", got, "test")
+	}
+}
+
+func TestList_Append(t *testing.T) {
+	list := MakeList(1, 2)
+	initialLen := list.Len()
+
+	list.Append(From(3))
+
+	if got := list.Len(); got != initialLen+1 {
+		t.Errorf("List.Append() length = %v, want %v", got, initialLen+1)
+	}
+
+	if got := list.GetItem(2).String(); got != From(3).String() {
+		t.Errorf("List.Append() last item = %v, want %v", got, From(3).String())
+	}
+}
+
+func TestList_Len(t *testing.T) {
+	tests := []struct {
+		name string
+		args []any
+		want int
+	}{
+		{"empty list", []any{}, 0},
+		{"single item", []any{1}, 1},
+		{"multiple items", []any{1, 2, 3}, 3},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			list := MakeList(tt.args...)
+			if got := list.Len(); got != tt.want {
+				t.Errorf("List.Len() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}