diff --git a/src/modules/string/commands_test.go b/src/modules/string/commands_test.go
index 704170e..7cacaa5 100644
--- a/src/modules/string/commands_test.go
+++ b/src/modules/string/commands_test.go
@@ -1 +1,11 @@
 package str
+
+import (
+	"testing"
+)
+
+func Test_HandleSetRange(t *testing.T) {}
+
+func Test_HandleStrLen(t *testing.T) {}
+
+func Test_HandleSubStr(t *testing.T) {}