A test sub having a housing with a first end, a second end, a bore, and an exterior portion of the housing including a coiled tubing connector may be used to test a connection with coiled tubing. The test sub includes a valve positioned within the bore. The second end of the housing may be inserted into coiled tubing and fluid may be pumped into the housing to test the connection between the connector and the coiled tubing. The test sub may be a housing that may be attached to a coiled tubing connector already connected to coiled tubing. A rod within the housing may be moved to an inserted position permitting communication between a pressure port of the housing and an exterior port of the coiled tubing connector. Fluid may be pumped into the pressure port to test the connection between the coiled tubing connector and the coiled tubing.