fixes for tests to be run in release-mode

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/pdu/mod.rs

@@ -9,6 +9,7 @@ mod raw_id;
 mod redact;
 mod relation;
 mod strip;
+#[cfg(test)]
 mod tests;
 mod unsigned;
 

src/core/pdu/tests.rs

@@ -1,5 +1,3 @@
-#![cfg(test)]
-
 use super::Count;
 
 #[test]

src/core/utils/mod.rs

@@ -16,6 +16,7 @@ pub mod set;
 pub mod stream;
 pub mod string;
 pub mod sys;
+#[cfg(test)]
 mod tests;
 pub mod time;
 

src/core/utils/tests.rs

@@ -1,4 +1,3 @@
-#![cfg(test)]
 #![allow(clippy::disallowed_methods)]
 
 use crate::utils;