diff --git a/src/test/ui/intrinsics/intrinsic-alignment.rs b/src/test/ui/intrinsics/intrinsic-alignment.rs
index 6a67d04a54cf4..02e3139d29444 100644
--- a/src/test/ui/intrinsics/intrinsic-alignment.rs
+++ b/src/test/ui/intrinsics/intrinsic-alignment.rs
@@ -19,7 +19,8 @@ mod rusti {
           target_os = "macos",
           target_os = "netbsd",
           target_os = "openbsd",
-          target_os = "solaris"))]
+          target_os = "solaris",
+          target_os = "vxworks"))]
 mod m {
     #[main]
     #[cfg(target_arch = "x86")]
diff --git a/src/test/ui/signal-alternate-stack-cleanup.rs b/src/test/ui/signal-alternate-stack-cleanup.rs
index 787ff51799a8a..8fef66eac8de2 100644
--- a/src/test/ui/signal-alternate-stack-cleanup.rs
+++ b/src/test/ui/signal-alternate-stack-cleanup.rs
@@ -7,6 +7,7 @@
 // ignore-wasm32-bare no libc
 // ignore-windows
 // ignore-sgx no libc
+// ignore-vxworks no SIGWINCH in user space
 
 #![feature(rustc_private)]
 extern crate libc;
diff --git a/src/test/ui/structs-enums/rec-align-u64.rs b/src/test/ui/structs-enums/rec-align-u64.rs
index c4e9e9ea5ee1a..680a690ba34e3 100644
--- a/src/test/ui/structs-enums/rec-align-u64.rs
+++ b/src/test/ui/structs-enums/rec-align-u64.rs
@@ -40,7 +40,8 @@ struct Outer {
           target_os = "macos",
           target_os = "netbsd",
           target_os = "openbsd",
-          target_os = "solaris"))]
+          target_os = "solaris",
+          target_os = "vxworks"))]
 mod m {
     #[cfg(target_arch = "x86")]
     pub mod m {