diff --git a/src/test/run-fail/morestack1.rs b/src/test/run-fail/morestack1.rs
index e3165fb9c0d..3a437d7d859 100644
--- a/src/test/run-fail/morestack1.rs
+++ b/src/test/run-fail/morestack1.rs
@@ -1,4 +1,5 @@
 // xfail-test
+// compile-flags:--stack-growth
 fn getbig(i: int) {
     if i != 0 {
         getbig(i - 1);
diff --git a/src/test/run-pass/morestack1.rs b/src/test/run-pass/morestack1.rs
index f37debc3281..0a57be1f9f6 100644
--- a/src/test/run-pass/morestack1.rs
+++ b/src/test/run-pass/morestack1.rs
@@ -1,4 +1,5 @@
 // xfail-test
+// compile-flags:--stack-growth
 fn getbig(i: int) {
     if i != 0 {
         getbig(i - 1);
diff --git a/src/test/run-pass/morestack2.rs b/src/test/run-pass/morestack2.rs
index 2f9cca7c7d9..ad600dcfa69 100644
--- a/src/test/run-pass/morestack2.rs
+++ b/src/test/run-pass/morestack2.rs
@@ -1,4 +1,5 @@
 // xfail-test
+// compile-flags:--stack-growth
 fn getbig(i: int) -> int {
     let m = if i >= 0 {
         let j = getbig(i - 1);