diff --git a/src/test/run-pass/issue-3168.rs b/src/test/run-pass/issue-3168.rs
index fbe66708e476d..609849bffb488 100644
--- a/src/test/run-pass/issue-3168.rs
+++ b/src/test/run-pass/issue-3168.rs
@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // xfail-fast
+// xfail-win32 #7999
 
 use std::comm;
 use std::task;
diff --git a/src/test/run-pass/issue-3176.rs b/src/test/run-pass/issue-3176.rs
index 96648a2706b6d..df242ee3d3059 100644
--- a/src/test/run-pass/issue-3176.rs
+++ b/src/test/run-pass/issue-3176.rs
@@ -9,6 +9,7 @@
 // except according to those terms.
 
 // xfail-fast
+// xfail-win32 #7999
 
 use std::comm::{Select2, Selectable};
 use std::comm;
diff --git a/src/test/run-pass/pipe-sleep.rs b/src/test/run-pass/pipe-sleep.rs
index 549c733244049..4475a16a63bb7 100644
--- a/src/test/run-pass/pipe-sleep.rs
+++ b/src/test/run-pass/pipe-sleep.rs
@@ -11,6 +11,7 @@
 // except according to those terms.
 
 // xfail-test needs sleep
+// xfail-win32 #7999
 
 extern mod extra;
 
diff --git a/src/test/run-pass/unit-like-struct-drop-run.rs b/src/test/run-pass/unit-like-struct-drop-run.rs
index 41b971d64d023..d4a95ea607c2b 100644
--- a/src/test/run-pass/unit-like-struct-drop-run.rs
+++ b/src/test/run-pass/unit-like-struct-drop-run.rs
@@ -10,6 +10,7 @@
 
 // Make sure the destructor is run for unit-like structs.
 // xfail-fast
+// xfail-win32 #7999
 
 use std::task;