# CTEST_USE_INSTRUMENTATION

Added in version 4.0.

This is a CMake Environment Variable. Its initial value is taken from the calling process environment.

Note

This feature is only available when experimental support for instrumentation has been enabled by the `CMAKE_EXPERIMENTAL_INSTRUMENTATION` gate.

Setting this environment variable to `1`, `True`, or `ON` enables `instrumentation` for CTest in Dashboard Client mode.