diff --git a/Documentation/rust/testing.rst b/Documentation/rust/testing.rst
index f43cb77bcc69..e3943aceceb9 100644
--- a/Documentation/rust/testing.rst
+++ b/Documentation/rust/testing.rst
@@ -140,11 +140,15 @@ are also mapped to KUnit.
 These tests are introduced by the ``kunit_tests`` procedural macro, which takes
 the name of the test suite as an argument.
 
+Each test suite should be guarded by a Kconfig option in
+``rust/kernel/Kconfig.test``.
+
 For instance, assume we want to test the function ``f`` from the documentation
 tests section. We could write, in the same file where we have our function:
 
 .. code-block:: rust
 
+	#[cfg(CONFIG_RUST_MYMOD_KUNIT_TEST)]
 	#[kunit_tests(rust_kernel_mymod)]
 	mod tests {
 	    use super::*;
@@ -173,6 +177,7 @@ the unit type ``()``) or ``Result`` (i.e. any ``Result<T, E>``). For instance:
 
 .. code-block:: rust
 
+	#[cfg(CONFIG_RUST_MYMOD_KUNIT_TEST)]
 	#[kunit_tests(rust_kernel_mymod)]
 	mod tests {
 	    use super::*;