mod items need to be marked with cfg(test) not test.

src/libcore/task/mod.rs

@@ -797,7 +797,7 @@ fn test_run_basic() {
     po.recv();
 }
 
-#[test]
+#[cfg(test)]
 struct Wrapper {
     mut f: Option<Chan<()>>
 }

src/libstd/cmp.rs

@@ -64,7 +64,7 @@ fn test_fuzzy_eq_eps() {
     assert!(!(&1.5f).fuzzy_eq_eps(&0.9, &0.5));
 }
 
-#[test]
+#[cfg(test)]
 mod test_complex{
     use cmp::*;