diff --git a/stdlib/src/sqlite.rs b/stdlib/src/sqlite.rs
index c7d8f769..7224a6c9 100644
--- a/stdlib/src/sqlite.rs
+++ b/stdlib/src/sqlite.rs
@@ -254,3 +254,46 @@ impl StdlibRegistry {
         );
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use rusqlite::types::Value;
+    use std::cell::RefCell;
+    use std::rc::Rc;
+    use techscript_runtime::value::RuntimeValue;
+
+    #[test]
+    fn test_runtime_to_sql_value() {
+        assert_eq!(runtime_to_sql_value(&RuntimeValue::Null), Value::Null);
+        assert_eq!(
+            runtime_to_sql_value(&RuntimeValue::Bool(true)),
+            Value::Integer(1)
+        );
+        assert_eq!(
+            runtime_to_sql_value(&RuntimeValue::Bool(false)),
+            Value::Integer(0)
+        );
+        assert_eq!(
+            runtime_to_sql_value(&RuntimeValue::Int(42)),
+            Value::Integer(42)
+        );
+        assert_eq!(
+            runtime_to_sql_value(&RuntimeValue::Float(3.14)),
+            Value::Real(3.14)
+        );
+        assert_eq!(
+            runtime_to_sql_value(&RuntimeValue::Str("test".to_string())),
+            Value::Text("test".to_string())
+        );
+
+        let list_val = RuntimeValue::List {
+            items: Rc::new(RefCell::new(vec![RuntimeValue::Int(1)])),
+            is_const: false,
+        };
+        assert_eq!(
+            runtime_to_sql_value(&list_val),
+            Value::Text(list_val.to_string())
+        );
+    }
+}