Calvary Chapel affirms Mark 16:9-20 as authentic Scripture and canonical. Chuck Smith taught that the Longer Ending is part of Mark's account, containing Jesus's post-resurrection appearances and commissioning. The passage validates the physical resurrection and the disciples' commissioning to preach the gospel worldwide. The promise of signs—casting out demons, speaking in tongues, healing the sick—is understood as evidence of God's power attending the preaching of the gospel.

In Calvary Chapel tradition, these miraculous signs may accompany gospel proclamation in the dispensational era of the church. The passage supports the mission emphasis and the openness to the Holy Spirit's power ('open but cautious' on charismatic phenomena). Mark 16:9-20 affirms that the risen Christ empowers his disciples for global witness.