diff --git a/langext/string_test.go b/langext/string_test.go
index 9d6170a..7c92ff6 100644
--- a/langext/string_test.go
+++ b/langext/string_test.go
@@ -150,3 +150,12 @@ func TestStrWrapBehaviour4(t *testing.T) {
 		t.Errorf("Expected %v but got %v", expected, result)
 	}
 }
+
+func TestStrRemoveControlCharacters(t *testing.T) {
+	str := "\rHel\alo\nWorld\t"
+	expected := "HelloWorld"
+	result := StrRemoveControlCharacters(str)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}