diff --git a/src/libcoretest/option.rs b/src/libcoretest/option.rs
index ad096630127c..66945ad251f1 100644
--- a/src/libcoretest/option.rs
+++ b/src/libcoretest/option.rs
@@ -219,7 +219,6 @@ fn test_ord() {
     assert!(big > None);
 }
 
-/* FIXME(#20575)
 #[test]
 fn test_collect() {
     let v: Option<Vec<isize>> = (0..0).map(|_| Some(0)).collect();
@@ -241,28 +240,26 @@ fn test_collect() {
 
     assert!(v == None);
 }
-*/
+
 
 #[test]
 fn test_cloned() {
-    let val1 = 1u32;
-    let mut val2 = 2u32;
-    let val1_ref = &val1;
+    let val = 1u32;
+    let val_ref = &val;
     let opt_none: Option<&'static u32> = None;
-    let opt_ref = Some(&val1);
-    let opt_ref_ref = Some(&val1_ref);
-    let opt_mut_ref = Some(&mut val2);
+    let opt_ref = Some(&val);
+    let opt_ref_ref = Some(&val_ref);
 
     // None works
     assert_eq!(opt_none.clone(), None);
     assert_eq!(opt_none.cloned(), None);
 
     // Immutable ref works
-    assert_eq!(opt_ref.clone(), Some(&val1));
+    assert_eq!(opt_ref.clone(), Some(&val));
     assert_eq!(opt_ref.cloned(), Some(1u32));
 
     // Double Immutable ref works
-    assert_eq!(opt_ref_ref.clone(), Some(&val1_ref));
-    assert_eq!(opt_ref_ref.clone().cloned(), Some(&val1));
+    assert_eq!(opt_ref_ref.clone(), Some(&val_ref));
+    assert_eq!(opt_ref_ref.clone().cloned(), Some(&val));
     assert_eq!(opt_ref_ref.cloned().cloned(), Some(1u32));
 }
diff --git a/src/libcoretest/result.rs b/src/libcoretest/result.rs
index ac8c2b953ae9..3fdb10287533 100644
--- a/src/libcoretest/result.rs
+++ b/src/libcoretest/result.rs
@@ -8,11 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-pub fn op1() -> Result<isize, &'static str> { Ok(666) }
-pub fn op2() -> Result<isize, &'static str> { Err("sadface") }
+fn op1() -> Result<isize, &'static str> { Ok(666) }
+fn op2() -> Result<isize, &'static str> { Err("sadface") }
 
 #[test]
-pub fn test_and() {
+fn test_and() {
     assert_eq!(op1().and(Ok(667)).unwrap(), 667);
     assert_eq!(op1().and(Err::<i32, &'static str>("bad")).unwrap_err(),
                "bad");
@@ -23,7 +23,7 @@ pub fn test_and() {
 }
 
 #[test]
-pub fn test_and_then() {
+fn test_and_then() {
     assert_eq!(op1().and_then(|i| Ok::<isize, &'static str>(i + 1)).unwrap(), 667);
     assert_eq!(op1().and_then(|_| Err::<isize, &'static str>("bad")).unwrap_err(),
                "bad");
@@ -35,7 +35,7 @@ pub fn test_and_then() {
 }
 
 #[test]
-pub fn test_or() {
+fn test_or() {
     assert_eq!(op1().or(Ok::<_, &'static str>(667)).unwrap(), 666);
     assert_eq!(op1().or(Err("bad")).unwrap(), 666);
 
@@ -44,7 +44,7 @@ pub fn test_or() {
 }
 
 #[test]
-pub fn test_or_else() {
+fn test_or_else() {
     assert_eq!(op1().or_else(|_| Ok::<isize, &'static str>(667)).unwrap(), 666);
     assert_eq!(op1().or_else(|e| Err::<isize, &'static str>(e)).unwrap(), 666);
 
@@ -54,18 +54,17 @@ pub fn test_or_else() {
 }
 
 #[test]
-pub fn test_impl_map() {
+fn test_impl_map() {
     assert!(Ok::<isize, isize>(1).map(|x| x + 1) == Ok(2));
     assert!(Err::<isize, isize>(1).map(|x| x + 1) == Err(1));
 }
 
 #[test]
-pub fn test_impl_map_err() {
+fn test_impl_map_err() {
     assert!(Ok::<isize, isize>(1).map_err(|x| x + 1) == Ok(1));
     assert!(Err::<isize, isize>(1).map_err(|x| x + 1) == Err(2));
 }
 
-/* FIXME(#20575)
 #[test]
 fn test_collect() {
     let v: Result<Vec<isize>, ()> = (0..0).map(|_| Ok::<isize, ()>(0)).collect();
@@ -86,10 +85,9 @@ fn test_collect() {
     let v: Result<Vec<()>, isize> = functions.iter_mut().map(|f| (*f)()).collect();
     assert!(v == Err(1));
 }
-*/
 
 #[test]
-pub fn test_fmt_default() {
+fn test_fmt_default() {
     let ok: Result<isize, &'static str> = Ok(100);
     let err: Result<isize, &'static str> = Err("Err");
 
@@ -100,7 +98,7 @@ pub fn test_fmt_default() {
 }
 
 #[test]
-pub fn test_unwrap_or() {
+fn test_unwrap_or() {
     let ok: Result<isize, &'static str> = Ok(100);
     let ok_err: Result<isize, &'static str> = Err("Err");
 
@@ -109,7 +107,7 @@ pub fn test_unwrap_or() {
 }
 
 #[test]
-pub fn test_unwrap_or_else() {
+fn test_unwrap_or_else() {
     fn handler(msg: &'static str) -> isize {
         if msg == "I got this." {
             50