diff --git a/library/std/src/sys/thread/unix.rs b/library/std/src/sys/thread/unix.rs
index 2f3ef1741cdfc..81ef39581d74d 100644
--- a/library/std/src/sys/thread/unix.rs
+++ b/library/std/src/sys/thread/unix.rs
@@ -155,6 +155,7 @@ pub fn available_parallelism() -> io::Result<NonZero<usize>> {
             target_os = "aix",
             target_vendor = "apple",
             target_os = "cygwin",
+            target_os = "wasi",
         ) => {
             #[allow(unused_assignments)]
             #[allow(unused_mut)]
diff --git a/library/std/tests/thread.rs b/library/std/tests/thread.rs
index dc8eadd75148b..ef13ce44d3180 100644
--- a/library/std/tests/thread.rs
+++ b/library/std/tests/thread.rs
@@ -85,7 +85,6 @@ fn thread_local_hygeiene() {
         target_env = "sgx",
         target_os = "solid_asp3",
         target_os = "teeos",
-        target_os = "wasi"
     ),
     should_panic
 )]