diff --git a/src/test/compile-fail/impure-pred.rs b/src/test/compile-fail/impure-pred.rs
new file mode 100644
index 000000000000..b5ebc10e72f2
--- /dev/null
+++ b/src/test/compile-fail/impure-pred.rs
@@ -0,0 +1,17 @@
+// -*- rust -*-
+// xfail-boot
+// xfail-stage0
+// error-pattern: impure function
+
+fn g() -> () {}
+
+pred f(int q) -> bool { 
+  g();
+  ret true;
+}
+
+fn main() {
+  auto x = 0;
+
+  check f(x); 
+}
diff --git a/src/test/compile-fail/not-a-pred-2.rs b/src/test/compile-fail/not-a-pred-2.rs
index c8ac4a08adb3..07ea13b35eb4 100644
--- a/src/test/compile-fail/not-a-pred-2.rs
+++ b/src/test/compile-fail/not-a-pred-2.rs
@@ -1,5 +1,6 @@
 // -*- rust -*-
 // xfail-boot
+// xfail-stage0
 
 // error-pattern: non-predicate
 
diff --git a/src/test/compile-fail/not-a-pred-3.rs b/src/test/compile-fail/not-a-pred-3.rs
index ea1b6cc09657..f4dafd204d79 100644
--- a/src/test/compile-fail/not-a-pred-3.rs
+++ b/src/test/compile-fail/not-a-pred-3.rs
@@ -1,5 +1,6 @@
 // -*- rust -*-
 // xfail-boot
+// xfail-stage0
 
 // error-pattern: expected the constraint name
 
diff --git a/src/test/compile-fail/not-a-pred-check.rs b/src/test/compile-fail/not-a-pred-check.rs
new file mode 100644
index 000000000000..55698ad26414
--- /dev/null
+++ b/src/test/compile-fail/not-a-pred-check.rs
@@ -0,0 +1,12 @@
+// -*- rust -*-
+// xfail-boot
+// xfail-stage0
+// error-pattern: non-predicate
+
+fn f(int q) -> bool { ret true; }
+
+fn main() {
+  auto x = 0;
+
+  check f(x); 
+}
diff --git a/src/test/compile-fail/not-pred-args.rs b/src/test/compile-fail/not-pred-args.rs
index c92b4ff9cae4..7fe6220ad98f 100644
--- a/src/test/compile-fail/not-pred-args.rs
+++ b/src/test/compile-fail/not-pred-args.rs
@@ -1,5 +1,6 @@
 // -*- rust -*-
 // xfail-boot
+// xfail-stage0
 
 // error-pattern: Constraint args must be
 
diff --git a/src/test/compile-fail/pred-not-bool.rs b/src/test/compile-fail/pred-not-bool.rs
new file mode 100644
index 000000000000..c0d19ef2c9fc
--- /dev/null
+++ b/src/test/compile-fail/pred-not-bool.rs
@@ -0,0 +1,13 @@
+// -*- rust -*-
+
+// error-pattern: mismatched types
+
+// this checks that a pred with a non-bool return
+// type is rejected, even if the pred is never used
+
+pred bad(int a) -> int {
+  ret 37;
+}
+
+fn main() {
+}
diff --git a/src/test/run-pass/pred-check.rs b/src/test/run-pass/pred-check.rs
new file mode 100644
index 000000000000..e099756469ba
--- /dev/null
+++ b/src/test/run-pass/pred-check.rs
@@ -0,0 +1,11 @@
+// -*- rust -*-
+// xfail-boot
+// xfail-stage0
+
+pred f(int q) -> bool { ret true; }
+
+fn main() {
+  auto x = 0;
+
+  check f(x); 
+}
diff --git a/src/test/run-pass/pred.rs b/src/test/run-pass/pred.rs
index 022e1fc4f8a2..b4d003a87740 100644
--- a/src/test/run-pass/pred.rs
+++ b/src/test/run-pass/pred.rs
@@ -1,12 +1,10 @@
 // xfail-stage0
-// xfail-stage1
-// xfail-stage2
 // -*- rust -*-
 
 fn f(int a, int b) : lt(a,b) {
 }
 
-fn lt(int a, int b) -> bool {
+pred lt(int a, int b) -> bool {
   ret a < b;
 }