diff --git a/tokio/tests/tcp_into_split.rs b/tokio/tests/tcp_into_split.rs
index 35265588845..52c0a4f240c 100644
--- a/tokio/tests/tcp_into_split.rs
+++ b/tokio/tests/tcp_into_split.rs
@@ -44,6 +44,7 @@ async fn split() -> Result<()> {
             assert_eq!(peek_len1, peek_len2);
 
             let read_len = read_half.read(&mut read_buf[..]).await?;
+            #[cfg(not(target_env = "sgx"))] // peek always returns Ok(0) in SGX
             assert_eq!(peek_len1, read_len);
             assert_eq!(&read_buf[..read_len], MSG);
             Ok(())
diff --git a/tokio/tests/tcp_split.rs b/tokio/tests/tcp_split.rs
index 6ef91b85854..53f350adfef 100644
--- a/tokio/tests/tcp_split.rs
+++ b/tokio/tests/tcp_split.rs
@@ -33,6 +33,7 @@ async fn split() -> Result<()> {
     assert_eq!(peek_len1, peek_len2);
 
     let read_len = read_half.read(&mut read_buf[..]).await?;
+    #[cfg(not(target_env = "sgx"))] // peek always returns Ok(0) in SGX
     assert_eq!(peek_len1, read_len);
     assert_eq!(&read_buf[..read_len], MSG);