Test Instance Block
minecraft:test_instance_blockThe Test Instance Block is a technical block exclusive to Java Edition, designed for game testing purposes. It can only be obtained through commands or the Creative inventory's Operator Utilities tab and cannot be broken in Survival mode. When activated in Creative mode by a player with permission level 2 or higher, it opens a GUI and displays a colored beacon-like beam indicating the current test status.
FAQ
How do I get a Test Instance Block?
Use commands like /setblock, /fill, /give, or /test, or find it in the Creative inventory under the Operator Utilities tab.
What do the different beam colors mean?
The color is #808080 for a running test, #00ff00 for a successful test, #ff0000 for a failed required test, and #ff8000 for a failed optional test.
Can I use this block in Survival mode?
No, Test Instance Blocks are unbreakable in Survival and cannot be placed there — they are exclusively for Creative mode testing.
When was this block added?
It was introduced in Java Edition 1.21.5 snapshot 25w03a, with texture changes in 25w10a and improvements to error preservation in version 1.21.9.