diff --git a/src/librustc/back/rpath.rs b/src/librustc/back/rpath.rs
index 04c653d4a13..adb0b659b14 100644
--- a/src/librustc/back/rpath.rs
+++ b/src/librustc/back/rpath.rs
@@ -114,7 +114,10 @@ fn get_rpaths_relative_to_output(os: session::os,
 
 fn get_rpath_relative_to_output(os: session::os,
                                 output: &Path,
-                                lib: &Path) -> Path {
+                                lib: &Path)
+                             -> Path {
+    use core::os;
+
     assert not_win32(os);
 
     // Mac doesn't appear to support $ORIGIN
@@ -197,6 +200,12 @@ fn minimize_rpaths(rpaths: &[Path]) -> ~[Path] {
 #[cfg(unix)]
 mod test {
     #[legacy_exports];
+
+    use driver::session;
+
+    use core::os;
+    use core::str;
+
     #[test]
     fn test_rpaths_to_flags() {
         let flags = rpaths_to_flags(~[Path("path1"),
diff --git a/src/librustc/driver/driver.rs b/src/librustc/driver/driver.rs
index 12cf35d2633..db15a572082 100644
--- a/src/librustc/driver/driver.rs
+++ b/src/librustc/driver/driver.rs
@@ -828,6 +828,11 @@ fn list_metadata(sess: Session, path: &Path, out: io::Writer) {
 mod test {
     #[legacy_exports];
 
+    use core::vec;
+    use std::getopts;
+    use syntax::attr;
+    use syntax::diagnostic;
+
     // When the user supplies --test we should implicitly supply --cfg test
     #[test]
     fn test_switch_implies_cfg_test() {
diff --git a/src/librustc/driver/session.rs b/src/librustc/driver/session.rs
index 58391bbbdd4..8ea5052afaf 100644
--- a/src/librustc/driver/session.rs
+++ b/src/librustc/driver/session.rs
@@ -332,6 +332,7 @@ fn sess_os_to_meta_os(os: os) -> metadata::loader::os {
 #[cfg(test)]
 mod test {
     #[legacy_exports];
+    use syntax::ast;
     use syntax::ast_util;
 
     fn make_crate_type_attr(t: ~str) -> ast::attribute {
diff --git a/src/librustc/front/test.rs b/src/librustc/front/test.rs
index a699b91f444..834b45f4944 100644
--- a/src/librustc/front/test.rs
+++ b/src/librustc/front/test.rs
@@ -238,7 +238,7 @@ fn nospan<T: Copy>(t: T) -> ast::spanned<T> {
 }
 
 fn path_node(ids: ~[ast::ident]) -> @ast::path {
-    @{span: dummy_sp(), global: false, idents: ids, rp: None, types: ~[]}
+    @{span: dummy_sp(), global: true, idents: ids, rp: None, types: ~[]}
 }
 
 fn mk_tests(cx: test_ctxt) -> @ast::item {
diff --git a/src/librustc/middle/astencode.rs b/src/librustc/middle/astencode.rs
index 815b91f6e7c..3a308011e75 100644
--- a/src/librustc/middle/astencode.rs
+++ b/src/librustc/middle/astencode.rs
@@ -23,12 +23,13 @@
 use middle;
 use util::ppaux::ty_to_str;
 
-use core::{dvec, option, vec};
+use core::{dvec, io, option, vec};
 use std::ebml::reader::get_doc;
 use std::ebml::reader;
 use std::ebml::writer::Encoder;
 use std::ebml;
 use std::map::HashMap;
+use std::prettyprint;
 use std::serialize;
 use std::serialize::{Encodable, EncoderHelpers, DecoderHelpers};
 use std::serialize::Decodable;
@@ -1071,10 +1072,10 @@ fn roundtrip(in_item: Option<@ast::item>) {
     let out_item = decode_item_ast(ebml_doc);
 
     let exp_str = do io::with_str_writer |w| {
-        in_item.encode(&std::prettyprint::Encoder(w))
+        in_item.encode(&prettyprint::Serializer(w))
     };
     let out_str = do io::with_str_writer |w| {
-        out_item.encode(&std::prettyprint::Encoder(w))
+        out_item.encode(&prettyprint::Serializer(w))
     };
 
     debug!("expected string: %s", exp_str);