diff --git a/src/test/run-pass/task-comm-10.rs b/src/test/run-pass/task-comm-10.rs
index 0482a1ff96d..a96b3062d9f 100644
--- a/src/test/run-pass/task-comm-10.rs
+++ b/src/test/run-pass/task-comm-10.rs
@@ -1,6 +1,10 @@
 // xfail-stage0
 // xfail-stage1
 // xfail-stage2
+
+use std;
+import std::task;
+
 fn start(chan[chan[str]] c) {
     let port[str] p = port();
     c <| chan(p);
@@ -10,9 +14,9 @@ fn start(chan[chan[str]] c) {
 
 fn main() {
     let port[chan[str]] p = port();
-    auto child = spawn "start" start(chan(p));
+    auto child = spawn start(chan(p));
     auto c; p |> c;
     c <| "A";
     c <| "B";
-    yield;
+    task::yield();
 }
diff --git a/src/test/run-pass/task-comm-11.rs b/src/test/run-pass/task-comm-11.rs
index 49c6382e5b3..723966082c1 100644
--- a/src/test/run-pass/task-comm-11.rs
+++ b/src/test/run-pass/task-comm-11.rs
@@ -1,6 +1,7 @@
 // xfail-stage0
 // xfail-stage1
 // xfail-stage2
+
 fn start(chan[chan[str]] c) {
     let port[str] p = port();
     c <| chan(p);
@@ -8,6 +9,6 @@ fn start(chan[chan[str]] c) {
 
 fn main() {
     let port[chan[str]] p = port();
-    auto child = spawn "child" start(chan(p));
+    auto child = spawn start(chan(p));
     auto c; p |> c;
 }
diff --git a/src/test/run-pass/task-comm-12.rs b/src/test/run-pass/task-comm-12.rs
index a1677a3d2ce..4c8fc4c2ebf 100644
--- a/src/test/run-pass/task-comm-12.rs
+++ b/src/test/run-pass/task-comm-12.rs
@@ -1,8 +1,7 @@
 // xfail-stage0
-// xfail-stage1
-// xfail-stage2
+
 use std;
-import std::_task;
+import std::task;
 
 fn main() -> () {
     test00();
@@ -14,13 +13,13 @@ fn start(int task_number) {
     
 fn test00() {    
     let int i = 0;
-    let task t = spawn thread "child" start(i);
+    let task t = spawn start(i);
     
     // Sleep long enough for the task to finish.
-    _task::sleep(10000u);
+    task::sleep(10000u);
     
     // Try joining tasks that have already finished.
-    join t;
+    task::join(t);
     
     log "Joined task.";
 }
\ No newline at end of file
diff --git a/src/test/run-pass/task-comm-13-thread.rs b/src/test/run-pass/task-comm-13-thread.rs
deleted file mode 100644
index 72f3c9568fe..00000000000
--- a/src/test/run-pass/task-comm-13-thread.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-// xfail-stage0
-// xfail-stage1
-// xfail-stage2
-use std;
-import std::_task;
-
-fn start(chan[int] c, int start, int number_of_messages) {
-    let int i = 0;
-    while (i < number_of_messages) {
-        c <| start + i;
-        i += 1;
-    }    
-}
-
-fn main() -> () {
-    log "Check that we don't deadlock.";
-    let port[int] p = port();
-    let task a = spawn thread "start" start(chan(p), 0, 10);
-    join a;
-    log "Joined task";
-}
\ No newline at end of file
diff --git a/src/test/run-pass/task-comm-13.rs b/src/test/run-pass/task-comm-13.rs
index c6de853332e..50b667e8a2f 100644
--- a/src/test/run-pass/task-comm-13.rs
+++ b/src/test/run-pass/task-comm-13.rs
@@ -1,8 +1,7 @@
 // xfail-stage0
-// xfail-stage1
-// xfail-stage2
+
 use std;
-import std::_task;
+import std::task;
 
 fn start(chan[int] c, int start, int number_of_messages) {
     let int i = 0;
@@ -15,7 +14,7 @@ fn start(chan[int] c, int start, int number_of_messages) {
 fn main() -> () {
     log "Check that we don't deadlock.";
     let port[int] p = port();
-    let task a = spawn "start" start(chan(p), 0, 10);
-    join a;
+    let task a = spawn start(chan(p), 0, 10);
+    task::join(a);
     log "Joined task";
 }
\ No newline at end of file
diff --git a/src/test/run-pass/task-comm-15.rs b/src/test/run-pass/task-comm-15.rs
index 5532cfdd580..58de577e274 100644
--- a/src/test/run-pass/task-comm-15.rs
+++ b/src/test/run-pass/task-comm-15.rs
@@ -1,6 +1,5 @@
 // xfail-stage0
-// xfail-stage1
-// xfail-stage2
+
 fn start(chan[int] c, int n) {
     let int i = n;
 
@@ -16,6 +15,6 @@ fn main() {
     // is likely to terminate before the child completes, so from
     // the child's point of view the receiver may die. We should
     // drop messages on the floor in this case, and not crash!
-    auto child = spawn thread "child" start(chan(p), 10);
+    auto child = spawn start(chan(p), 10);
     auto c; p |> c;
 }
diff --git a/src/test/run-pass/task-comm-2.rs b/src/test/run-pass/task-comm-2.rs
index e856f0bbef2..73d67ef61e3 100644
--- a/src/test/run-pass/task-comm-2.rs
+++ b/src/test/run-pass/task-comm-2.rs
@@ -1,11 +1,12 @@
 // xfail-stage0
-// xfail-stage1
-// xfail-stage2
+
+use std;
+
+import std::task;
+
 fn main() -> () {    
-    log "===== SPAWNING and JOINING TASKS =====";
-    test00(false);
     log "===== SPAWNING and JOINING THREAD TASKS =====";
-    test00(true);
+    test00();
 }
 
 fn start(int task_number) {
@@ -17,22 +18,18 @@ fn start(int task_number) {
     log "Finished task.";
 }
     
-fn test00(bool create_threads) {
+fn test00() {
     let int number_of_tasks = 8;
     
     let int i = 0;
     let vec[task] tasks = [];
     while (i < number_of_tasks) {
         i = i + 1;
-        if (create_threads) {
-            tasks += [spawn thread start(i)];
-        } else {
-            tasks += [spawn start(i)];
-        }
+        tasks += [spawn start(i)];
     }
     
     for (task t in tasks) {
-        join t;
+        task::join(t);
     }
     
     log "Joined all task.";
diff --git a/src/test/run-pass/task-comm-3.rs b/src/test/run-pass/task-comm-3.rs
index 97293102fa8..198d04f44fd 100644
--- a/src/test/run-pass/task-comm-3.rs
+++ b/src/test/run-pass/task-comm-3.rs
@@ -1,11 +1,11 @@
 // xfail-stage0
-// xfail-stage1
-// xfail-stage2
+
+use std;
+import std::task;
+
 fn main() -> () {
    log "===== WITHOUT THREADS =====";
-   test00(false);
-   log "====== WITH THREADS ======";
-   test00(true);
+   test00();
 }
 
 fn test00_start(chan[int] ch, int message, int count) {
@@ -19,7 +19,7 @@ fn test00_start(chan[int] ch, int message, int count) {
     log "Ending test00_start";
 }
 
-fn test00(bool is_multithreaded) {
+fn test00() {
     let int number_of_tasks = 16;
     let int number_of_messages = 4;
     
@@ -33,12 +33,7 @@ fn test00(bool is_multithreaded) {
     // Create and spawn tasks...
     let vec[task] tasks = [];
     while (i < number_of_tasks) {
-        if (is_multithreaded) {
-            tasks += [
-                spawn thread test00_start(ch, i, number_of_messages)];
-        } else {
-            tasks += [spawn test00_start(ch, i, number_of_messages)];
-        }
+        tasks += [spawn test00_start(ch, i, number_of_messages)];
         i = i + 1;
     }
     
@@ -55,7 +50,7 @@ fn test00(bool is_multithreaded) {
 
     // Join spawned tasks...
     for (task t in tasks) {
-        join t;
+        task::join(t);
     }
     
     log "Completed: Final number is: ";
diff --git a/src/test/run-pass/task-comm-7.rs b/src/test/run-pass/task-comm-7.rs
index 5602b742196..9953faf0b4c 100644
--- a/src/test/run-pass/task-comm-7.rs
+++ b/src/test/run-pass/task-comm-7.rs
@@ -1,6 +1,8 @@
 // xfail-stage0
-// xfail-stage1
-// xfail-stage2
+
+use std;
+import std::task;
+
 fn main() -> () {
    test00();
 }
@@ -37,10 +39,10 @@ fn test00() {
         i += 1;
     }
             
-    join t0;
-    join t1;
-    join t2;
-    join t3;
+    task::join(t0);
+    task::join(t1);
+    task::join(t2);
+    task::join(t3);
     
     assert (sum == (((number_of_messages * 4) * 
                    ((number_of_messages * 4) - 1)) / 2));
diff --git a/src/test/run-pass/task-comm-8.rs b/src/test/run-pass/task-comm-8.rs
index c731456cbfe..9953faf0b4c 100644
--- a/src/test/run-pass/task-comm-8.rs
+++ b/src/test/run-pass/task-comm-8.rs
@@ -1,6 +1,8 @@
 // xfail-stage0
-// xfail-stage1
-// xfail-stage2
+
+use std;
+import std::task;
+
 fn main() -> () {
    test00();
 }
@@ -19,14 +21,14 @@ fn test00() {
     let port[int] p = port();
     let int number_of_messages = 10;
         
-    let task t0 = spawn thread test00_start(chan(p), 
-                               number_of_messages * 0, number_of_messages);
-    let task t1 = spawn thread test00_start(chan(p), 
-                               number_of_messages * 1, number_of_messages);
-    let task t2 = spawn thread test00_start(chan(p), 
-                               number_of_messages * 2, number_of_messages);
-    let task t3 = spawn thread test00_start(chan(p), 
-                               number_of_messages * 3, number_of_messages);
+    let task t0 = spawn test00_start(chan(p), 
+                        number_of_messages * 0, number_of_messages);
+    let task t1 = spawn test00_start(chan(p), 
+                        number_of_messages * 1, number_of_messages);
+    let task t2 = spawn test00_start(chan(p), 
+                        number_of_messages * 2, number_of_messages);
+    let task t3 = spawn test00_start(chan(p), 
+                        number_of_messages * 3, number_of_messages);
     
     let int i = 0;
     while (i < number_of_messages) {
@@ -37,10 +39,10 @@ fn test00() {
         i += 1;
     }
             
-    join t0;
-    join t1;
-    join t2;
-    join t3;
+    task::join(t0);
+    task::join(t1);
+    task::join(t2);
+    task::join(t3);
     
     assert (sum == (((number_of_messages * 4) * 
                    ((number_of_messages * 4) - 1)) / 2));
diff --git a/src/test/run-pass/task-comm-9.rs b/src/test/run-pass/task-comm-9.rs
index abe5ea81098..3f93537e2d8 100644
--- a/src/test/run-pass/task-comm-9.rs
+++ b/src/test/run-pass/task-comm-9.rs
@@ -1,6 +1,8 @@
 // xfail-stage0
-// xfail-stage1
-// xfail-stage2
+
+use std;
+import std::task;
+
 fn main() -> () {
    test00();
 }
@@ -19,7 +21,7 @@ fn test00() {
     let port[int] p = port();
     let int number_of_messages = 10;
         
-    let task t0 = spawn thread "child"
+    let task t0 = spawn
         test00_start(chan(p), number_of_messages);
     
     let int i = 0;
@@ -28,7 +30,7 @@ fn test00() {
         i += 1;
     }
             
-    join t0;
+    task::join(t0);
     
     assert (sum == (number_of_messages * (number_of_messages - 1)) / 2);
 }
\ No newline at end of file
diff --git a/src/test/run-pass/task-comm.rs b/src/test/run-pass/task-comm.rs
index 3a3d7d5942d..16d255ab046 100644
--- a/src/test/run-pass/task-comm.rs
+++ b/src/test/run-pass/task-comm.rs
@@ -1,9 +1,11 @@
 // xfail-stage0
-// xfail-stage1
-// xfail-stage2
+
+use std;
+
+import std::task;
 
 fn main() -> () {
-    test00(true);
+    test00();
     // test01();
     test02();
     test03();
@@ -23,7 +25,7 @@ fn test00_start(chan[int] ch, int message, int count) {
     log "Ending test00_start";
 }
 
-fn test00(bool is_multithreaded) {
+fn test00() {
     let int number_of_tasks = 1;
     let int number_of_messages = 4;
     log "Creating tasks";
@@ -36,12 +38,7 @@ fn test00(bool is_multithreaded) {
     let vec[task] tasks = [];
     while (i < number_of_tasks) {
         i = i + 1;
-        if (is_multithreaded) {
-            tasks += [
-                spawn thread test00_start(ch, i, number_of_messages)];
-        } else {
-            tasks += [spawn test00_start(ch, i, number_of_messages)];
-        }
+        tasks += [spawn test00_start(ch, i, number_of_messages)];
     }
     
     let int sum = 0;
@@ -55,7 +52,7 @@ fn test00(bool is_multithreaded) {
     }
 
     for (task t in tasks) {
-        join t;
+        task::join(t);
     }
     
     log "Completed: Final number is: ";
@@ -89,9 +86,9 @@ obj vector(mutable int x, int y) {
 
 fn test03() {
     log "Creating object ...";
-    let mutable vector v = vector(1, 2);
+    let vector v = vector(1, 2);
     log "created object ...";
-    let mutable vector t = v;
+    let vector t = v;
     log v.length();
 }
 
@@ -109,7 +106,7 @@ fn test04() {
     let int i = 4;
     while (i > 0) {
         i = i - 1;
-        spawn thread test04_start();
+        spawn test04_start();
     }
     log "Finishing up.";
 }
@@ -125,7 +122,7 @@ fn test05_start(chan[int] ch) {
 fn test05() {
     let port[int] po = port();
     let chan[int] ch = chan(po);
-    spawn thread test05_start(ch);
+    spawn test05_start(ch);
     let int value; po |> value;
     po |> value;
     po |> value;
@@ -150,12 +147,11 @@ fn test06() {
     let vec[task] tasks = [];
     while (i < number_of_tasks) {
         i = i + 1;
-        tasks += [spawn thread test06_start(i)];
-        // tasks += [spawn test06_start(i)];
+        tasks += [spawn test06_start(i)];
     }
     
     for (task t in tasks) {
-        join t;
+        task::join(t);
     }
 }