Test boosters can be an effective tool to increase muscle strength and size, but they do not replace solid resistance training. Research has shown that regular weight training can help increase your testosterone levels, and not just your testosterone benefit.  It's a win-win relationship.
Here are a few tips to take your training and T to the next level:
Think Big to Small: Research shows that starting your workout with compound lifts (bench press, squat, overhead Press, etc.) followed by minor isolation movements results in a stronger anabolic response. [1
Get in, get off: Try to shorten your workout without reducing the overall volume. The testosterone level is higher than 60 minutes after a shorter workout. During this time, most rest periods should be kept short, such as 30 to 90 seconds, explains strength coach Parker Hyde in "How to build testosterone with exercise in a natural way".
Keep more weapons in your arsenal: Occasionally use lifting methods such as forced repetitions, negatives, and drop sets to further strain your body. Personal trainer and fitness journalist Michael Berg explains in "6 ways to lower testosterone levels" that these techniques are proven to be more effective than muscle failure. 
No, probably not a good idea for every set, but the final decision for a safe exercise – such as curls or shoulder presses – may pay off over time.
As a final remark, you should use every test booster with the right mindset. Building a testosterone level, like building your dream concept, is not an overnight project. Dig in, do the work and make decisions that will make you successful in the long term.