A memory module testing system operating in a vibratory environment can retain a memory module in place in a memory socket using both socket latches and a retainer clip. The retainer clip can attach to a module support tower of the memory socket. The retainer clip can have a flexible multi-spring structure forming a three-axis vibration dampening system that can prevent the socket latches from opening while testing in the test environment. The retainer clip can secure the socket latches using an upper flange and a lower flange to prevent unintended motion of the socket latches. The retainer clip can be secured to the module support towers at the ends of the memory socket using clip arms and clip arm tips to attach to the module support towers.