Adam Savage’s Tested

One Day Builds are a signature recurring series on Tested where Adam Savage fabricates a prop, costume piece, or functional object from raw materials to finished product within a single day. The format is popular because it captures his real workshop instincts — planning on the fly, solving problems as they appear, and improvising with available tools — making it one of the most-watched content formats the channel produces.

Yes — before co-hosting MythBusters, Adam Savage worked as a special effects fabricator in Hollywood, including model and miniature work at Industrial Light & Magic on films like Star Wars Episode II: Attack of the Clones. That professional background as a hands-on maker and prop builder is the direct foundation that Tested is built on, which explains the channel's ongoing obsession with Star Wars props and screen-accurate replicas.

Adam and Jamie have been open over the years that they were professional partners on MythBusters rather than close personal friends, and they don't regularly spend time together off-camera. Jamie still surfaces in Tested content in a retrospective context — including recounting unintended life lessons from their time on the show — but both largely pursue separate projects since the series ended.

Yes — examining the construction of actual hero costumes from major film and TV productions is a core part of what Tested does. Recent content has featured a detailed breakdown of Homelander's costume from The Boys, going through materials, fabrication methods, and the hidden design details that most viewers never catch on screen.

Adam Savage is well known for showing up to San Diego Comic-Con in elaborate, screen-accurate costumes he built himself, and documenting those builds on Tested has become a channel tradition. The cosplay content appeals to serious costume makers because Adam approaches it with the same fabrication standards he'd apply to a professional prop build, not a quick Halloween costume.

Adam Savage collects and fabricates screen-accurate replicas of iconic movie and TV props, with Star Wars pieces appearing most frequently alongside items from Marvel productions and other genre films. Beyond acquiring originals, he regularly builds his own versions from scratch on camera, sharing every measurement, material choice, and mistake along the way.

Tested.com is the companion platform to the YouTube channel, offering extended project documentation, build guides, and community resources for makers that go deeper than a single video can cover. Together, the website and YouTube channel function as a full maker platform rather than just a video feed — the site is where subscribers find reference material and project files tied to builds they watched on YouTube.

Tested has worked with brands that align tightly with its maker and technology audience, including KiwiCo (STEM project kits), Alienware and Intel (high-performance hardware), and ThreatLocker (cybersecurity). Meta has also sponsored content on the channel, reflecting how broadly the Tested audience — heavily skewed toward technically-minded adults — is valued across the technology sector.

Adam Savage's Tested has grown to over seven million subscribers on YouTube, placing it firmly in the Mega tier of creator channels. It is primarily a YouTube-first operation, though the brand also maintains active presences on Instagram and through Tested.com for deeper community engagement.

The Tested audience is overwhelmingly male and spans a wide age range, from viewers in their early twenties through people in their mid-forties and older. That cross-generational spread reflects two overlapping groups: longtime MythBusters fans who grew up watching Adam Savage on Discovery Channel, and a newer wave of makers, engineers, cosplayers, and pop-culture enthusiasts drawn to the channel's hands-on build content.