- Indonesia is a state of law. This is expressly stated in the 1945 Constitution. As a state of law, Indonesia established laws and regulations as the basis for the implementation of government. The legislation should be formed and run harmoniously and not contrary to other laws and regulations, but in reality, there is often a conflict between laws and regulations. The problem studied is the model of testing legislation in the future in creating legal certainty in Indonesia. This type of research is normative legal research with a statutory approach, concept approach, and comparative approach. The source of legal materials used is; primary legal materials, secondary legal materials, and tertiary legal materials. The legal material is discussed, criticized, and analyzed using prescriptive analysis. Concluded, the model of testing legislation in the future in creating legal certainty in Indonesia is with a single testing system by one institution that specifically carries out testing of all legal products from the regional level to the 1945 NRI Constitution to create robustness and legal certainty.

Index Terms- Testing of laws and regulations, Legal Certainty