diff --git a/rust/test.go b/rust/test.go
index 4fd1da0..5e42c3f 100644
--- a/rust/test.go
+++ b/rust/test.go
@@ -203,6 +203,7 @@
 	flags = test.binaryDecorator.compilerFlags(ctx, flags)
 	if test.testHarness() {
 		flags.RustFlags = append(flags.RustFlags, "--test")
+		flags.RustFlags = append(flags.RustFlags, "-A missing-docs")
 	}
 	if ctx.Device() {
 		flags.RustFlags = append(flags.RustFlags, "-Z panic_abort_tests")